इंटरनेट
मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार”
“प0रा1 को छोड न' 5 तरफ”
“The Right to Information, The Right to Live”
“Step Out From the Old to the New”
Mazdoor Kisan Shakti Sangathan
Jawaharlal Nehru
IS 371 (B) (1999): Ceiling Roses – Specification [ETD 14:
Electrical Wiring Accessories]
“!ान $ एक न' भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”
है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
vkbZ,l@IS 371 : 1999
¼f}Hkk"kh@Bilingual½
Hkkjrh; ekud
lhfyax jksfT+kT+k — fof'kf"V
¼ rhljk iqujh{k.k ½
la'kks/ku la[;k 1, 2, 3 vkSj 4 lekfo"V
Indian Standard
CEILING ROSES — SPECIFICATION
( Third Revision )
Incorporating Amendments No. 1, 2, 3 and 4
;wMhlh@UDC 29.140.10
©
Hkk ek C;w j ks 2012
Hkkjrh; ekud C;w j ks
ekud Hkou] 9 cgknq j 'kkg t+ Q j ekxZ
ubZ fnYyh 110002
© BIS 2012
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Qjojh@February 2012
ewY; oxZ@Price Group 8
fo|qr rkjcanh lgk;dkax fo"k; lfefr] bZVhMh 14
izkDdFku
bl Hkkjrh; ekud (rhljk iqujh{k.k) ds elkSns dh fo|qr rkjcanh lgk;dkax fo"k; lfefr }kjk vafre :i nsus vkSj fo|qr
rduhdh foHkkx ifj"kn ds vuqeksnu ds ckn Hkkjrh; ekud C;wjks }kjk xzg.k fd;k x;kA
;g ekud lcls igys 1954 esa izdkf'kr gqvk] vkSj vxys la'kksèku 1966 vkSj 1979 esa gq,A rhljk iqujh{k.k varjkZ"Vªh; i¼fr
ij gqbZ izxfr;ksa dks utj esa j[kdj fd;k x;k gSA bl ekud ds fiNys iqujh{k.k dks ykxw djus ls izkIr vuqHko dks Hkh è;ku
esa j[kk x;k gSA
bl iqujh{k.k ds eq[; y{k.k gSa%
d) IykfLVd ds {ks=k esa gqbZ izxfr;k¡ vkSj varjkZ"Vªh; O;ogkj dks è;ku esa j[krs gq, vfu;fer Å"ek vkSj vkx ds izfrjksèku
dh txg nhfIr rkj ijh{k.k cnyk x;k gSA
[k) fcuk isap ds VfeZuy 'kkfey fd, x, gSaA
x) vfèkd 'kCnkoyh 'kkfey dh xbZ gSA
?k) vFkZ VfeZuy vkSj pkj vyx VfeZuy okyh lhfyax jksT+k dh lqfoèkk 'kkfey dh xbZ gSA
Ä) vfèkd 'ks"k ruko vkSj tax izfrjksèku ds fy, ijh{k.k 'kkfey fd;k x;k gSA
p) lhfyax jkst dk oxhZdj.kA
(rhljs doj ij tkjh)
Electrical Wiring Accessories Sectional Committee, ETD 14
FOREWORD
This Indian Standard (Third Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by
the Electrical Wiring Accessories Sectional Committee had been approved by the Electrotechnical Division Council.
This standard was originally published in 1954 and was subsequently revised in 1966 and 1979. The third revision
is contemplated to take cognizance of the developments at the international level. The experience gained through
the implementation of this standard since its last revision has also been taken into account.
The important features of this revision are:
a)
Replacement of resistance to abnormal heat and fire test by Glow-Wire Test keeping in view the
development in the area of plastics and also keeping in line with international practice.
b) Introduction of screwless terminals.
c) Introduction of additional terminology.
d) Provision of earthing terminals and four separate terminal ceiling roses.
e) Inclusion of test for resistance to excessive residual stress and to rusting.
f) Classification of the ceiling roses.
(Continued on third cover)
vkbZ,l@IS 371 : 1999
Hkkjrh; ekud
lhfyax jksfT+kT+k — fof'kf"V
¼ rhljk iqujh{k.k ½
Indian Standard
CEILING ROSES — SPECIFICATION
( Third Revision )
1 fo"k; {ks = k
1 SCOPE
1-1 ;g ekud lrg vkSj vèkZ xM~<k fdLe dh lhfyax jksT+k
ftudk iz;ksx lkèkkj.k rFkk cgqiz;kstu yVdrs izdk'k midj.k
vkSj foèkqr ifjiFk ftuesa vfHkfgr oksYVrk 250 oksYV ls
vfèkd u gks vkSj fo|qr èkkjk 6 ,sfEi;j ls vfèkd u gks vkSj
vfèkdre 16 ,sfEi;j vafre fo|qr ifjiFk ds fy, isap okys
lIykbZ VfeZuy okys lhfyax jksT+k rFkk vfèkdre 10 ,sfEi;j
fcuk iasp okys lhfyax jksT+k ds fy, gSA bl ekud esa n'kkZbZ xbZ
vis{kkvksa dk iz;ksx esa lqj{kk ds fy, fo'ks"k lanHkZ gSA
lhfyax jksT+k fo|qr rkjsa tks vkb,l 694 % 1990 ^dk;Z'khy
oksYVrk 1 110 oksYV dks ysrs gq, vkSj bl rd ds fy, fo|qr
jksèkh ihohlh dscysa (rhljk iqujh{k.k)* ds vuqlkj cuh gksa ds
mi;ksx ds fy, mfpr gSA
lhfyax jksT+k ftlesa ySEi gksYMj rFkk Y;wfeusvj ds lacèa ku tksMu+ s
vkSj rksMu+ s dh lqfoèkkvksa ds fy, nqckjk rkjcanh djus ;ksX; VfeZuy
ds vykok nwljs lkèku gkas og bl ekud esa lfEefyr ugha gSA
1.1 This standard covers ceiling roses of surface and
semi-recessed types for use with simple or multiple
pendant lighting fitting and for the use in circuits in
which the nominal voltage does not exceed 250 V and
the current of 6A only and intended to be used in final
circuits with rated current 16A maximum for ceiling
roses with screw-type supply terminals or 10 A
maximum for ceiling roses with screwless supply
terminals. The requirements specified in this standard
have particular reference to safety in use.
The ceiling roses are intended for use with cables
complying with IS 694 : 1990 ‘PVC insulated cables
for working voltage up to and including 1 110 V (third
revision)’.
Ceiling roses incorporating means other than rewirable
terminals, to facilitate the connection and disconnection
of lampholders or luminaires, are not covered by this
standard.
fVIi.kh µ lgk;d milkèku tks bl ekud ds vuqlkj gSa mudks
fo|qr fudkl ekè;e dgk tk ldrk gSA
NOTE — Accessories complying with this standard may be
regarded as lighting outlets.
2 la n HkZ
2 REFERENCES
2-1 fuEufyf[kr Hkkjrh; ekud bl ekud ds vko';d
micaèk gSa%
vkbZ,l la302&1 % 1979
694 % 1990
2.1 The following Indian Standards are necessary
adjuncts to this standard:
'kh"kZd
?kjsyw vkSj ,sls gh fo|qr midj.kksa dh
lqj{kk % Hkkx 1 vke vko';drk,a (ikpok¡
iqujh{k.k)
dk;Z'khy oksYVrk 1 100 oksYV dks ysrs
gq, vkSj bl rd ds fy, fo|qr jksèkh
ihohlh dscysa (rhljk iqujh{k.k)
IS No.
302-1 : 1979
694 : 1990
1
Title
Safety of household and similar
electrical appliances: Part 1 General
requirements (fifth revision)
PVC insulated cables for working
voltage up to and including 1 100 V
(third revision)
vkbZ,l@IS 371 : 1999
IS No.
732 : 1989
vkbZ,l la732 % 1989
'kh"kZd
fo|qr rkjcanh laLFkkiuksa ds fy, dk;Z
lafgrk
1401 % 1970
vfHkxE;rk ds fy, tk¡p lykbZ;ka (igyk
iqujh{k.k)
2500 (Hkkx 1) % uewuksa dk fujh{k.k djus dk rjhdk %
1992
Hkkx 1 izR;sd Fkksd eky dh tkap ds
fy, ladsr dh gqbZ Lohdk;Z xq.koÙkk Lrj
(AQL) fo'ks"krk uewuk ;kstuk,a (nwljk
iqujh{k.k)
2667 % 1988
fo|qr rkjcanh ds fy, dBksj bLikr ds
ikbZi@pSusy ds fy, lkt lkeku@tksM+
(igyk iqujh{k.k)
3419 % 1988
dBksj jfgr èkkrw osQ pSuy@ikbZi osQ fy,
tksM+@lkT+k lkeku (nwljk iqujh{k.k)
9968 (Hkkx 1) % izR;kLFkyd fo|qr jksèkh dscysa% Hkkx 1
1988
1 100 oksYV rd vkSj bldks ysrs gq,
dk;Z'khy oksYVrk ds fy, (igyk iqujh{k.k)
11000 (Hkkx 2@ vkx ds [krjs ds fy, fujh{k.k % Hkkx 2
[kaM 1) % 1984 ijh{k.k <ax] [kaM 1 nhfIr rkj dk ijh{k.k
vkSj funsZ'ku
14772 % 2000 ?kjsyw vkSj ,sls gh vpy fo|qr lkt
lkeku ds fy, milkèkuksa ds laLFkkiu ds
fy, vkoj.k
1401 : 1970
2500 (Part l) :
1992
2667 : 1988
3419 : 1988
9968 (Part 1) :
1988
11000 (Part 2/
Sec 1) : 1984
14772 : 2000
Title
Code of practice for electrical wiring
installations
Accessibility test probes (first
revision)
Sampling inspection procedures: Part
1 Attribute sampling plans indexed
by acceptable quality level (AQL) for
lot-by-lot inspection (second
revision)
Fittings for rigid steel conduits for
electrical wiring (first revision)
Fittings for rigid non-metallic
conduits (second revision)
Elastomers insulated cables: Part 1
For working voltages up to and
including 1 100 V (first revision)
Fire hazard testing: Part 2 Tests
methods, Section 1 Glow-wire test
and guidance
Enclosures for accessories for
household and similar fixed electrical
installation
3 TERMINOLOGY
For the purpose of this Indian Standard, the following
definitions shall apply.
3 ifjHkkf"kd 'kCnkoyh
bl Hkkjrh; ekud ds iz;kstu ds fy, fuEufyf[kr ifjHkk"kk,a
ykxw gksaA
3.1 Ceiling Rose
An accessory for connection to the fixed wiring of an
installation to pass current to a lampholder or a
luminaire by means of the conductors of a flexible cable
or cord.
3-1 lhfya x jks T+ k
;g laLFkkiu dh fLFkj rkjcanh ds lacaèku ls ySEi gksYMj ;k
Y;wfeusvj esa ypdnkj dscy ;k rkj ls èkkjk dks xqtkjus dk
milkèku gSA
3.2 Surface-Type Ceiling Rose
3-2 lrguq e k lhfya x jks T+ k
og lhfyax jksTk+ ftuesa cSBus dh lrg bl rjg rS;kj dh tkrh
gS fd tc bl dks tgka yxkuk gks ogka yxk;k tk, ;g iwjk
lrg ds ckgj fn[kkbZ nsA
A ceiling rose provided with a seating surface such that
when mounted as intended it projects wholly outside
the surface on which it is mounted.
3.3 Semi-recessed or Flush-Type Ceiling Rose
3-3 vèkZ & dVko ;k Ýy'k iz d kj ds lhfya x
jks T + k
lhfyax jksTk+ ftuds vkèkkj ij NksVs xksykdkj daM;wV ds fMCcs
;k nwljs ;ksX; vkoj.k tks vkbZ,l 14772 ds vuqlkj gksa] esa
iwjs ;k vkaf'kd Hkkx vanj pys tkrs gSaA
A ceiling rose intended for mounting with its base
partially or completely sunk into a small circular
conduit box or other suitable enclosure complying with
IS 14772.
3.4 Terminal Housing
3-4 VfeZ u y gkÅfla x
lhfyax jksTk+ dk og Hkkx tks VfeZuy dh fLFkfr vkSj foHkktu
djrk gSA
That part of the ceiling rose which locates and separates
the terminals.
2
vkbZ,l@IS 371 : 1999
3-5 VfeZ u y
3.5 Terminal
;g og lkèku gS ftudh enn ls miHkksDrk mfpr dscy ;k
ypdnkj rkj vkSj milkèku ds pkyd Hkkxksa ds chp fo|qr
lacaèku fcuk fdlh Lis'ky vkStkj ds dj ldrk gSA
A means by which the user can make an electrical
connection between the appropriate cable or flexible
cable or cord and the conducting parts of the accessory
without the use of special tools.
3-6 ia s p uq e k VfeZ u y
3.6 Screw-Type Terminal
og VfeZuy ftlesa fdlh Hkh izdkj ds isap ;k f<cjh dh
lgk;rk ls lhèks ;k vlhèks lacaèku fd, tk ldrs gSaA
A terminal in which the connection is made directly or
indirectly by means of screws or nuts of any kind.
3-7 [ka c s uq e k VfeZ u y
3.7 Pillar Terminal
og VfeZuy ftlesa pkyd dks ,d Nsn ;k xrZ esa Mkydj
isap ;k isaspksa dh fiaMyh ds uhps idM+k tkrk gSA idM+ nkc
isap dh fiaMyh }kjk lhèks yxk;k tk ldrk gS ;k ,d
eèk;eorhZ Hkkx ftl ds Åij isp dh f<cjh ls nkc yxkbZ
tk ldrh gSA
A terminal in which the conductor is inserted into a
hole or cavity, where it is clamped under the shank of
the screw or screws. The clamping pressure may be
applied directly by the shank of the screw or through
an intermediate member to which pressure is applied
by the shank of the screw.
3-8 is a p okys VfeZ u y
3.8 Screw Terminal
VfeZuy ftlesa pkyd isap ds 'kh"kZ ds uhps idM+ esa jgrk gSA
idM+ dk nkc lhèks gh isap ds 'kh"kZ vFkok ,d eèk;orhZ Hkkx
tSlk fd ,d okW'kj] idM+us dh IysV vFkok izfr iQSyko
;qfDr ls yxk;k tk ldrk gSA
A terminal in which the conductor is clamped under
the head of the screw. The clamping pressure may be
applied directly by the head of the screw or through an
intermediate part, such as a washer, clamping plate or
anti-spread device.
3-9 LVM VfeZ u y
3.9 Stud Terminal
A terminal in which the conductor is clamped under a
nut. The clamping pressure may be applied directly by
a suitably shaped nut or through an intermediate part,
such as a washer, clamping plate or anti-spread device.
VfeZuy ftlesa pkyd f<cjh ds uhps idM+ esa jgrk gSA idM+
dk nkc lhèks gh mfpr 'kDy f<cjh }kjk vFkok ,d eè;eofrZ
Hkkx tSlk fd ,d okW'kj idM+us dh IysV vFkok izfr iQSyko
;qfDr ls yxk;k tk ldrk gSA
3.10 Screwless Terminal
3-10 fcuk is a p okys VfeZ u y
A connecting terminal for the connection and
subsequent disconnection of one conductor capable of
being dismantled, the connection being made, directly
or indirectly, by means of springs or wedges, eccentrics
or cones, etc.
la;kstu ds fy, VfeZuy ftldks ,d vyx fd, tkus okys
pkyd ds la;kstu djus vkSj rksM+us ds fy, iz;ksx esa yk;k tk
ldsA la;kstu dekuh rFkk iQku mRdsanzd rFkk 'kadq bR;kfn ds
}kjk lhèkk vlhèkk fd;k tk ldsA
3.11 Load Terminals
3-11 yks M VfeZ u y
Terminals intended to accommodate flexible
conductors for the connection of a lamp load, via a
lampholder or luminaire.
VfeZuy ftlesa ySEi gksYMj ;k Y;wfeusvj }kjk ySEi yksM ds
lacaèku ds fy, ypdnkj pkyd yxk, tk ldsaA
3.12 Supply Terminals
3-12 lIykbZ VfeZ u y
;g VfeZuy fLFkj rkjcanh esa pkydksa dks yxk;k tkrk gSA
Terminals intended to accommodate conductors of the
fixed wiring.
3-13 yw i VfeZ u y
3.13 Loop Terminal
lIykbZ VfeZuy ftlls 'kfDriw.kZ pkydksa dks fcuk ypdnkj
rkj ds lacaèku ls ijLij tksM+k tkrk gSA
A supply terminal intended for the interconnection of
live conductors without the provision for the connection
of flexible cords.
3-14 vkoj.k
3.14 Cover
ckgjh vkos"Vu dk og Hkkx tks laLFkkiu ds fy, izos'k xzg.k
djus ds mís'; ls mrkjk tkrk gSA
That part of the external enclosure which is intended
to be removed to gain access for installation purposes.
3
vkbZ,l@IS 371 : 1999
3-15 'kfDr iw . kZ Hkkx
3.15 Live Parts
lkekU; mi;ksx ds nkSjku tks èkkjk okgd Hkkx vkSj og èkkrq ds
Hkkx tks buds lEidZ esa vkrs gSaA
Current carrying parts, and those metal parts in contact
with them during normal use.
NOTE — Earthing terminals are not considered to be current
carrying parts.
fVIi.kh µ vFkZ VfeZuy èkkjk okgd Hkkxksa esa ugha fopkjs tkrsA
3-16 js f VM èkkjk
3.16 Rated Current
vfèkd ls vfèkd yksM] ,sEih;j esa] tks yksM VfeZuyksa ls tksM+k
tk ldrk gSA
The maximum load, in amperes, which may be
connected to the load terminals.
3-17 VkbZ i ijh{k.k
3.17 Type Tests
;s os ijh{k.k gSa tks bl ekud dh vis{kkvksa ds fy, vuq:irk
izekf.kr djus ds fy, fd, tkrs gSaA ;s ,d izdkj ds fn,
lhfyax jksT+k ds fMtkbZu esa lkekU; xq.krk dks izekf.kr djus ds
fy, gksrs gSaA
Tests carried out to prove conformity with the
requirements of the standard. These are intended to
prove the general qualities and design of a given type
of ceiling rose.
3-18 Lohdk;Z r k ijh{k.k
3.18 Acceptance Tests
Tests carried out on samples taken from a lot for the
purpose of acceptance of the lot.
;s os ijh{k.k gSa tks Fkksd eky dks Lohdkj djus ds mís'; ls
Fkksd eky esa ls fy, x, uewuksa ij fd, tkrs gSaA
3.19 Routine Tests
3-19 us e h ijh{k.k
Tests carried out on each item to check the essential
requirements which are likely to vary during
production.
;s os ijh{k.k gSa tks mRiknu ds nkSjku izR;sd oLrq ij mu
t:jh vis{kkvksa dks tk¡pus ds fy, fd, tkrs gSa] tks fuekZ.k
ds nkSjku cny ldrh gSA
4 CONDITIONS OF USE
4 iz;ksx dh 'krs±
Ceiling roses shall be suitable for use under the
following conditions:
fuEufyf[kr 'krksZa esa lhfyax jksT+k dk iz;ksx mfpr gksxk%
a)
An ambient temperature having a peak value
not exceeding 45°C with an average value not
exceeding 40°C in a period of 24 h, but not
subject to exposure to direct radiation from
the sun or any other source of heat likely to
raise the temperature above the specified
ambient temperature;
b) An ambient temperature having a value not
less than –5°C; and
c) An atmosphere not subject to excessive
pollution by smoke, chemical fumes, salt laden
spray, prolonged periods of high humidity or
other abnormal conditions.
d) ifjos'k rkieku ftldk f'k[kj eku 45°lsa- ls T;knk
u gks vkSj 24 ?kaVs dh vofèk ls vkSlru ek=kk
40°lsa- ls T;knk u gks] ij lw;Z dh lhèkh èkwi ;k
xehZ dk dksbZ nwljk lkèku tks fuf'pr fd, x,
ifjos'k rkieku dks u c<+k ldrk gks_
[k) ifjos'k rkieku ftldk eku –5°lsa- ls de u gks_
vkSj
x) ,slk okrkoj.k tks èkw,¡] jlk;fud ok'kWi] uedhu
ckSNkj yacs le; dh flYy ;k nwljh vlkèkkj.k
fLFkfr;ksa ls vfèkd iznwf"kr u gksA
5 lkèkkj.k t:jrs a
lhfyax jksT+k dh bl izdkj vfHkdYiuk dh tk, vkSj ,slk
cuk;k tk, fd tc og mfpr <ax ls laLFkkfir djds lkekU;
iz;ksx esa yk, tk,¡ rks mudk dk;Z Hkjksls ;ksX; gksuk pkfg,
vkSj blds dkj.k euq"; vkSj okrkoj.k dks dksbZ [krjk ugha
gksuk pkfg,A
lhfyax jksTk+ fuf'pr :i esa ;gk¡ fn, x, lHkh ijh{k.kksa vFkok
buls laxr mfpr t:jrksa dks iwjk djus ;ksX; gksA
5 GENERAL REQUIREMENTS
Ceiling roses shall be so designed and constructed that
when installed in the proper manner and in normal use
they function reliably and cause no danger to persons
or surrounding.
Ceiling roses shall be capable of meeting all the relevant
requirements and tests specified herein.
NOTE — Where tolerances are not specified in this standard
the values are to be regarded as nominal.
fVIi.kh µ bl ekud esa tgka NwV fuf'pr :i ls c;ku ugha dh xbZ
ogka ml ewY; dks vfHkfgr ekuk tk,A
4
vkbZ,l@IS 371 : 1999
6 GENERAL CONDITIONS FOR TYPE TESTING
6 VkbZ i ijh{k.kks a ds fy, lkekU; fLFkfr;k¡
6-1 tc rd fd vU;Fkk bl ekud esa lhfyax jksT+k ds
ijh{k.kksa dk mYys[k u fd;k gks] bUgsa lkekU; mi;ksx esa
15°lsa- ls 35°lsa- rkieku ds chp ijhf{kr fd;k tk ldrk gSA
6.1 Unless otherwise specified in this standard ceiling
roses shall be tested as delivered and installed, as in
normal use, at any ambient temperature between 15°C
to 35°C.
6-2 fuEukafdr flyflysokj [kaM+ksa ds rgr vfèkd`r tk¡p vkSj
ijh{k.k ds fy, lhfyax jksT+k ds dqy ukS uewus is'k fd, tk,a%
d) rhu lhfyax jksT+k µ [kaM 5 ] 9 ls 14
14] 20 vkSj 21_
[k) rhu lhfyax jksT+k µ [kaM 11 ls 14
14] 15-3 ls 15-6
vkSj 16
16] 17 vkSj 20
20_ vkSj
x) rhu lhfyax jksT+k µ [kaM 15-1
15-1] 15-2 vkSj 18
18] 19
vkSj 22
22A
6.2 A total sample of nine ceiling roses shall be
submitted to inspection and tests in the following order
of clauses:
a)
Three ceiling roses — Clauses 5, 9 to 14 and
20 and 21;
b) Three ceiling roses — Clauses 11 to 14, 15.3
to 15.6 and 16, 17 and 20; and
c) Three ceiling roses — Clauses 15.1, 15.2 and
18, 19 and 22.
6-3 ;fn [kaM 6-2 esa fn, x, ijh{k.kksa esa ls dksbZ Hkh lhfyax
jksT+k foiQy ugha gksrk rks ml izdkj ds lhfyax jksT+k dks bl
ekud ds vuqlkj lgh eku fy;k tk,A
;fn ,d Hkh lhfyax jksT+k [kaM 6-2 esa fn, x, ijh{k.kksa esa ls
fdlh ,d ijh{k.k ;k ijh{k.kksa dh Js.kh esa foiQy gksrk gS rks
mu lhfyax jksT+k dks lkekU; vfHkdYiuk vFkok mRiknu dk
izfrfufèk u ekuk tkk,] rc rhu vyx lhfyax jksT+k dk lewg
ml ijh{k.k ;k ijh{k.kksa ds fy, tks [kaM 6-2 esa fn, x, gSa]
tek djok,¡A ;fn bl iquiZjh{k.k esa dksbZ Hkh lhfyax jksT+k
foiQy ugha gksrk rks ml izdkj ds lhfyax jksT+k dks bl ekud
ds vuqlkj lgh ekuk tk,xkA
;fn ,d ls vfèkd lhfyax jksT+k [kaM 6-2 esa fn, ijh{k.kksa esa
foiQy gksrs gSa rks ml izdkj ds lhfyax jksT+k dks bl ekud ds
vuqlkj lgh ugha ekuk tk,xkA
6.3 If no ceiling roses fails in the tests specified in 6.2
then ceiling roses of that type shall be deemed to comply
with this standard.
If one ceiling rose fails in any individual test or series
of tests, specified in 6.2 and the ceiling roses can be
shown to be not representative of normal design or
production, then a separate set of three ceiling roses
shall be submitted to the relevant test or series of tests
specified in 6.2. If no ceiling rose fails in this re-test
then ceiling roses of that type shall be deemed to comply
with this standard.
If more than one ceiling rose fails in the tests specified
in 6.2 then ceiling roses of that type shall be deemed
not to comply with this standard.
7 ;ks X ;rkØe fuèkkZ j .k
7-1 lhfyax jksT+k dh jsfVM oksYVrk 250 oksYV ls vfèkd ugha
gksuh pkfg,A
7-2 lhfyax jksT+k dh jsfMV fctyh èkkjk 6 ,sfEi;j ls vfèkd
ugha gksuh pkfg,A
7 RATINGS
7.1 Ceiling roses shall have a rated voltage of not
exceeding 250 V.
7.2 Ceiling roses shall have a rated current of 6A only.
8 oxhZ d j.k
8-1 lhfyax jksT+k dks fuEufyf[kr oxksZa esa ckaVk tk ldrk gS%
d) yxkus ds rjhds ds vuqlkj%
3-2 ns[ksa)] ;k
1) lrg izdkj ds (3-2
2) vèkZ dVko izdkj ds ;k ÝyS'k izdkj ds
3-3 ns[ksa)A
(3-3
[k) yksM&LiksVZ ds vuqlkj%
1)
2)
8 CLASSIFICATION
8.1 Ceiling roses shall be classified as follows:
a)
According to the method of mounting
1) Surface-type (see 3.2), or
2) Semi-recessed or flush-type (see 3.3).
b) According to load-support:
1) Intended to support mechanical loads by
means of a flexible cord complying with
IS 694 (see 14.4), and
2) Intended to support mechanical loads as
nominated by the manufacturer in
addition to those specified in 8.1(b)(1),
by means other than a flexible cord.
vkbZ,l 694 ds ypdnkj rkj ls ;kaf=kd yksM
14-4 ns[ksa )] vkSj
rd nsus ds mís'; ds fy, (14-4
ypdnkj rkj ds vykok nwljs lkèku tks
mRiknd }kjk 8-1
8-1([k)(1) ls vfrfjDr ukeTk+ n
fd, x, gksa] ls ;kaf=kd LiksVZ nsus ds mís';
ds fy,A
5
vkbZ,l@IS 371 : 1999
x)
?k)
c)
According to the current-carrying terminal
arrangement:
1) having provision for the connection of
switch wiring, or
2) having no provision for the connection
of switch wiring.
d) According to terminal type:
1) having screw-type terminals, or
2) having screwless terminals, or
3) having a combination of both types of
terminals.
fctyh èkkjk okgd VfeZuy dh O;oLFkk ds vuqlkj%
1) fLop esa rkjcanh ds lacèa ku dh O;oLFkk gS] ;k
2) fLop esa rkjcanh ds lacèa ku dh O;oLFkk ugha gSA
VfeZuyksa dh fdLeksa ds vuqlkj%
1) isap uqek VfeZuy] ;k
2) fcuk isap okys VfeZuy] ;k
3) nksuksa izdkj ds VfeZuyksa ds lqey
s okys VfeZuyA
9 lw p uka d u
9-1 lhfyax jksT+k ds eq[; Hkkx ij ;k fdlh ,d Hkkx tks
lkekU; mi;ksx esa muds lkFk fLFkj gks ij fuEufyf[kr
tkudkjh vafdr gksuh pkfg,%
9 MARKING
9.1 Ceiling roses shall be marked with the following
information on their main part or one of the parts fixed
to it in normal use:
d) mRiknd }kjk fuf'pr izekf.kr oksYVrk_
[k) mRiknd }kjk fuf'pr izekf.kr fctyh èkkjk_
x) lhfyax jksT+k ftlesa laLFkkiu ds fy, rkjcanh esa
fcuk isap okys VfeZuy dh lqfoèkk gks] ds Åij ;g
vafdr gksuk pkfg,A ^10 ,sfEi;j ls vfèkd izekf.kr
fo|qr ifjiFk esa iz;ksx u djsaA*_
?k) mRiknd ;k ftEesnkj cspus okys dk uke ;k O;kikj
fpÉ_ vkSj
Ä) ftl ns'k eas fufeZr gqbZA
a) rated voltage, specified by manufacturer;
b) rated current, specified by the manufacturer;
c) ceiling roses provided with screwless
terminals for installation in wiring shall be
marked ‘Not to be used in circuits with
ratings exceeding 10 A’;
d) name or trade-mark of the manufacturer or
responsible vendor; and
e) country of manufacturer.
9-2 ;fn fpÉksa dk iz;ksx djuk gks rks os fuEufyf[kr vuqlkj
gksus pkfg,a%
,sfEi;j
oksYV
vFkZ
ykbZo
U;wVªy
9.2 When symbols are used, they shall be as follows:
A
V
amperes
volts
earth
live
neutral
⊥
–L
N
fVIi.kh µ vuqjksèk fd;k tkrk gS fd tgk¡ gks lds fpÉksa dk iz;ksx
fd;k tk,A
izekf.kr fctyh èkkjk vkSj izekf.kr oksYVrk dks lwpukadu ds fy, vdsys
vad Hkh iz;ksx esa yk, tk ldrs gSAa izekf.kr fctyh èkkjk izekf.kr oksYVrk
ds vkxs ;k Åij vafdr dh tkuh pkfg, vkSj oksYVrk ls ,d js[kk }kjk
vyx dh tk,] mnkgj.k ds fy,] 6A 250V] ;k 6@250A
A
V
⊥
–L
N
NOTE — It is recommended that, wherever practicable, the
symbols should preferably be used.
For the marking of the rated current and rated voltage, figures
may be used alone. The figure for rated current shall be placed
before or above that for the rated voltage and separated from the
latter by a line, for example, 6 A 250 V, or 6/250.
9-3 tgk¡ dksbZ Hkh VfeZuy fdlh fo'ks"k lacaèku ds fy,
yxk;k x;k gks ogka blds mi;ksx ckcr lwpukadu fn[kk,a
(mnkgj.k ds fy,] ywi) ,slh lwpukadu isapksa] okW'kjksa ;k nwljs
vklkuh ls mrkjs tkus okys Hkkxksa ij ugha yxkuh pkfg,A
9.3 Where any terminal is provided for particular
connection purposes there shall be marking to indicate
its intended use (for example, LOOP). Such marking
shall not be placed on screws, washers or other easily
removable parts.
9-4 lwpukadu vklkuh ls i<+s tkus ;ksX; vkSj fVdkÅ gksuh
pkfg,A
9.4 Marking shall be easily legible and durable.
9-4-1 vuqo`fÙk ds fy, lwpukadu dh tkap fujh{k.k }kjk vkSj
ikuh esa fHkxks, gq, diM+s ls 15 lSdsaM rd jxM+dj vkSj
nqckjk isVªksfy;e fLizV esa fHkxks, diM+s ls 15 lSosaQM ds fy,
jxM+ dj dh tk ldrh gSA
9.4.1 Compliance shall be checked by inspection and
by rubbing the markings for 15 s with a cloth soaked
in water and again for 15 s with a cloth soaked in
petroleum spirit.
lwpukadu i<+s tkus ;ksX; jgus pkfg,A
The marking shall remain legible.
6
vkbZ,l@IS 371 : 1999
Markings produced by an engraving or moulding
process are deemed to comply without this test.
lapfdr izfØ;k }kjk ;k mdjh gqbZ lwpukadu dks fcuk ijh{k.k
ds lgh eku ysuk pkfg,A
9-5 lhfyax jksTk+ ftudk 8 ([k)(2) ds vuqlkj oxhZdj.k
fd;k x;k gks muds lkFk ;kaf=kd yksM vkSj yxkus okyh lrg
ij fiQV djus ds rjhds eqrkfcd muds lqjf{kr mi;ksx ds
fy, laLFkkfir lwpuk dk izcaèk fd;k tk,A
9.5 Ceiling roses classified in accordance with 8(b)(2)
shall be provided with installation information
regarding their safe working for mechanical loads and
the method of fixing to mounting surfaces.
9.5.1 Compliance shall be checked by inspection.
9-5-1 vuqikyu dks fujh{k.k }kjk tkapk tk,A
9-6 lhfyax jksTk+ ij ekud fpÉ Hkh vafdr fd;k tk ldrk
gSA
9.6 The ceiling roses may also be marked with the
Standard Mark.
9-6-1 ekud eqgj dk mi;ksx Hkkjrh; ekud C;wjks vfèkfu;e]
1986 vkSj mlds vèkhu cus fu;eksa vkSj fofu;eksa ds çkoèkkuksa
vuqlkj gksA fuekZrkvksa rFkk laLdrkZvksa dks ftu 'krks± osQ
vèkhu ekud eqgj yxkus ds fy, ykblsal fn;k tkrk gS
mldk fooj.k Hkkjrh; ekud C;wjks ls çkIr fd;k tk ldrk
gSA
9.6.1 The use of the Standard Mark is governed by the
provisions of the Bureau of Indian Standards Act, 1986
and the Rules and Regulations made thereunder. The
details of conditions under which a licence for the use
of Standard Mark may be granted to manufacturers or
producers may be obtained from the Bureau of Indian
Standards.
10 vk;ke
10 DIMENSIONS
10-1 vèkZdVko ;k Ýy'k lhfyax jksT+k dk fMtkbZu bl izdkj
fd;k tk, fd os vkbZ,l 2667 vkSj vkbZ,l 3419 esa fn,
x, laLFkkiu okys fMCcksa ij vklkuh ls yx tk,aA
10-2 lrg ds Åij yxus okys lhfyax jksT+k esa laLFkkiu okys
isapksa ds fy, de ls de 5 feeh- O;kl ds de ls de nks
Nsn j[ks tk,aA
10.1 Semi-recessed or flush ceiling roses shall be so
designed that they can be fitted to the relevant mounting
boxes, as specified in IS 2667 and IS 3419.
10.2 Surface mounting ceiling roses shall be provided
with at least two holes of at least 5 mm diameter, to
accommodate mounting screws
10.3 The two holes should preferably be on nominal
centers of 50.8 mm or 60.3 mm. This dimensions is
applicable for semi-recessed type ceiling roses.
10-3 50-8 feeh- ;k 60-3 feeh- dsanz ij nks Nsn gksus pkfg,aA
;g vk;ke vèkZdVko izdkj ds lhfyax jksT+k ij ykxw gSaA
NOTE — This is for the guidance to the manufacturers.
fVIi.kh µ ;g mRiknd ds ekxZn'kZu ds fy, gSA
11 ACCESSIBILITY OF LIVE PARTS
11 'kfDriw . kZ Hkkxks a dh vfHkxE;rk
11-1 lhfyax jksT+k bl izdkj cuk, o fMtkbu fd, tk,a fd tc
os Bhd izdkj ls rkjas yxkdj lkekU; mi;ksx ds fy, leqPP;
djds fiQV fd, tk,a rc 'kfDriw.kZ Hkkxksa esa vfHkxe u gksAa
11.1 Ceiling roses shall be so designed and constructed
that when properly assembled, correctly wired and fitted
with flexible cord and cover as in normal use, live parts
are not accessible.
11-1-1 uewus dks LVSSaMMZ VSLV fiQaxj ls 5 U;wVu ?k"kZ.k cy
yxkdj tk¡pk tk ldrk gS (tSlk VSLV fiaQxj vkbZ,l 1401
esa fn;k x;k gS) tc lhfyax jksT+k ds lHkh igq¡p ds Hkhrjh
Hkkxksa dks vkbZ,l 694 ds vuqlkj cuh 0-5 feeh-2 xksykdkj
ypdnkj tqM+ok¡ rkj ls yksM VfeZuy ls tksM+ fn;k tk,A
11.1.1 Compliance shall be checked by using a standard
test finger with a force of 5N (Test finger as given in
IS 1401) to all accessible parts of the ceiling rose, when
fitted with a circular twin 0.5 mm2 flexible cord
complying with IS 694 connected to the load terminals.
11-2 lhfyax jksT+k bl izdkj ls cuk, o fMtkbu fd, tk,a
fd tc os Bhd izdkj ls rkjsa yxkdj leqPp; djds vkoj.k
ds lkFk ypdnkj rkjksa ds fcuk fiQV fd, tk,a] rc 'kfDriw.kZ
Hkkx vfHkxe ugha gksus pkfg,aA
11-2-1 lhfyax jksTk+ ds lHkh igqap ds Hkhrj Hkkxksa dks LVSaMMZ
VSLV fiQaxj dh lgk;rk ls tSlk fd vkbZ,l 1401 esa nh xbZ
gS] 5 U;wVu ?k"kZ.k cy yxkdj tk¡pk tk ldrk gSA
11.2 Ceiling roses shall be so designed and constructed
that when properly assembled, correctly wired and fitted
with cover, but not fitted with flexible cord, live parts
are not accessible.
11-3 tc blls lacafèkr fLop (vkWiQ iksth'ku) can gks vkSj
11.3 When an associated controlling switch is in the
11.2.1 Compliance shall be checked by applying, with
a force of 5N, using a standard test finger as given in
IS 1401 to all accessible parts of the ceiling rose.
7
vkbZ,l@IS 371 : 1999
lhfyax jksT+k t:jr ds eqrkfcd fdlh ypdnkj rkj dks
fudkyus ;k cnyus ds fy, [kksyk tk, rks dksbZ Hkh pkfyr
Hkkx ftlesa fctyh èkkjk jg ldrh gS] oks vpkud Nwus ls
vfHkxe ugha gksuk pkfg,A
11-3-1 vuqo`fr dks tk¡pus ds fy,] lhfyax jksT+k ftlesa dscy
tks vkbZ,l 694 dh lkj.kh 5 ;k 6 ds eqrkfcd gks] mlesa ls
1-0 feeh-2 ds jksfèkr pkykd lhfyax jksT+k esa fiQV djus ds
ckn vkbZ,l 1401 esa fn, x, VSLV fiQaxj 1 dks 5 U;wVu
?k"kZ.k cy ,sls Hkkxksa esa yxk;k tk, tgka Nwus dh laHkkouk
lcls T;knk gksA
‘OFF’ position and the ceiling rose is dismantled to the
extent necessary to remove or replace a corresponding
flexible cord, any conducting part which may remain
electrified shall not be accessible to accidental contact.
11-4 lhfyax jksT+k esa 'kfDriw.kZ Hkkxksa dks vpkud Nwus ls cpus
ds fy, ,d vkos"Vu yxk;k tk,A
11.4.1 Screw type covers of ceiling roses shall not be
removable without the cover being turned through an
angle of more than 270°C.
11-4-1 lhfyax jksT+k dk pwM+hnkj vkoj.k 270°lsa- ds dks.k ls
vfèkd ?kqekus ls igys ugha [kqyuk pkfg,A
11-4-1-1 lhfyax jksTk+ dks lery lrg ij rkj yxkdj vkSj
vkoj.k ds dk;Zdkjh pwMh+ nkj O;kl (feeh- es)a dk 0-02 xq.kk
U;wVu ehVj cykèkw.kZ ls dl dj tkapk tk,A vkoj.k 270 fMxzh
dks.k ls vfèkd ?kqekus ls igys gVkus ;ksX; ugha gksuk pkfg,A
11.4.1.1 Compliance shall be checked by mounting
the ceiling rose on a flat plain surface, wired as in
normal use and with the cover tightened to a torque,
in newton metres, equal to 0.02 times the effective
thread diameter, in millimetres, of the securing thread.
The cover shall not be removable without first being
turned through an angle greater than 270°.
12 Hkw l a i dZ u ds fy, iz c a è k
12 PROVISION FOR EARTHING
113.1 Compliance shall be checked by applying, with
a force of 5N, test finger 1 of IS 1401 in a manner
most likely to make contact with such parts, with the
ceiling rose fitted with 1.0 mm2 insulated conductors
from a cable complying with Table 5 or 6 of IS 694.
11.4 Ceiling roses shall be provided with an enclosure
to prevent inadvertent contact with live parts.
12.1 All ceiling roses shall be provided with an
earthing terminal as specified in 13. The earthing
terminals shall be visibly distinguishable.
12-1 lHkh lhfyax jksT+k esa vFkZ VfeZuy dk izcaèk gksuk pkfg,]
tSlk fd [kaM 13 esa fuf'pr fd;k x;k gSA vFkZ VfeZuy
fn[kus esa foHksn~; gksuk pkfg,A
12-2 èkkrq ds lHkh Hkkx tks lhfyax jksTk+ ;k pkyd dh jksfèkrrk
iQsy gksus ls 'kfDriw.kZ cu ldrs gS]a vkSj tks vkbZ,l 1401 esa
fn, x, VSLV fiQaxj ds lkFk Nwus ;ksX; gks ldrs gS]a tc lhfyax
jksTk+ dks Bhd izdkj ls rkjcanh djds yxk;k gks] dk vFkZ izcèa k
izHkkoiw.kZ gksuk pkfg,A ;g t:jr ispksa ;k oqQpkyd inkFkZ vkSj
oSls inkFkZ ftuls 'kfDriw.kZ Hkkxksa dks bl rjg vyx fd;k x;k
gks fd oks lkekU; mi;ksx esa 'kfDriw.kZ u cu ldsAa dksbZ Hkh vFkZ
VfeZuy ;k vFkZ laidZ vkSj og Hkkx ftUgsa blds lkFk tksMu+ s dh
t:jr gks] dk izfrjksèk de gksuk pkfg,A
12.2 Provision shall be made for the effective earthing
of all metal parts that may become live in the event of
failure of the insulation of the ceiling rose or conductors
and which are capable of being touched by test finger
as given in IS 1401, when the ceiling rose is correctly
wired and mounted as in normal use. This requirement
does not apply to screws in or through non-conducting
material and separated by such material from live parts
in such a way that, in normal use, they cannot become
live. Any connection between the earthing terminal or
earthing contact and parts required to be connected
thereto shall be of low resistance.
fctyh èkkjk fudkyus okys ,lh lkèku dh fcuk&yksM oksYVrk
12 oksYV ls vfèkd ugha gksuh pkfg, vkSj ;a=k dh izekf.kr
fctyh èkkjk 1-5 xq.kk ds cjkcj ;k 25 ,sfEi;j tks Hkh vfèkd
gks] vFkZ VfeZuy ;k vFkZ lEidZ vkSj igqap ds Hkhrj èkkrq ds
Hkkxksa ds chp esa ckjh&ckjh xqtkjsaA
A current derived from an ac source having a no-load
voltage not exceeding 12 V, and equal to 1.5 times the
rated current of the appliance or 25 A, whichever is the
greater, is passed between the earthing terminal or earthing
contact, and each of the accessible metal parts in turn.
lhfyax jksT+k ds vFkZ VfeZuy vkSj igqap ds Hkhrj èkkrq okys
Hkkx ds chp esa oksYVrk MªkWi dks ekisa vFkok bl oksYVrk
Mªki vkSj fctyh èkkjk ls izfrjksèk dh x.kuk djsaA
The voltage drop between the earthing terminal of the
ceiling rose and the accessible metal part is measured,
and the resistance calculated from the current and this
voltage drop.
fdlh Hkh gkyr esa izfrjksèk 0-1 vksãl ls vfèkd ugha gksuk pkfg,A
In no case shall the resistance exceed 0.1 ohms.
The resistance of the flexible cable or cord is not
included in the resistance measurement.
ypdnkj dscy ;k rkj dk izfrjksèk bl çfrjksèk ds ifjek.k
esa 'kkfey u fd;k tk,A
8
vkbZ,l@IS 371 : 1999
Care is taken that the contact resistance between the
tip of the measuring probe and the metal part under
test does not influence the test results.
è;ku jgs fd eki naM dk fljk tkap vèkhu èkkrq ds Hkkxksa
ds chp esa laidZ izfr:i urhtksa dks izHkkfor u djsA
13 VfeZ u y
13 TERMINALS
13-1 'kfDriw.kZ] U;wVjy vkSj j{kk ds fy, vFkZ pkydksa ds
la;kstu ds fy, VfeZuy yxk, tk,aA VfeZuy ftlesa 1-0
feeh-2 ;k 1-5 feeh-2 ds ,d] nks ;k rhu dBksj pkydksa]
fLop rkjcanh ds la;kstu okys VfeZuy dks NksM+dj ftuesa ,sls
,d ;k nks pkydksa ds la;kstu dh vuqefr gS ds la;kstu dh
LFkkfir rkjcanh esa fdlh fo'ks"k rS;kjh ds fcuk la;kstu dh
lqfoèkk gksA ypdnkj rkj ds 0-5 feeh-2 ls 1-0 feeh-2 rd
ds 'kfDriw.kZ vkSj U;wVªy pkydksa ds la;kstu dh vuqefr ds
fy, vyx lkèku gksaA
13.1 Terminals shall be provided for the connection
of live, neutral and protective earthing conductors.
Terminal intended for the connection of fixed wiring
shall permit the connection, without special
preparation, of one, two or three 1.0 mm2 or 1.5 mm2
solid conductors, except in the case of the terminal
for the connection of switch wiring, which shall permit
the connection of one or two such conductors. There
shall be separate means to permit the connection of
live and neutral conductors of a flexible cord from 0.5
mm2 to 1.0 mm2.
VfeZuy bl rjg ds gksus pkfg,a fd os gjsd pkyd dks
etcwrh ls idM+ ysa vkSj os bl rjg fMtkbZu fd, tk,a fd
pkyd ds rarqvksa dks ckgj fiQlyus ls jksdsaA
Terminal shall be of a type in which each conductor is
gripped firmly and they shall be so designed as to
prevent the strands of the conductor from slipping out.
fVIi.kh;ka
1 iasp okys VfeZuy dBksj pkydksa dks O;fDrxr ;k lkewfgd rkSj ij
idM+ ldsaA
2 vFkZ VfeZuy dks dsoy ,d isap yxk;k tk ldrk gSA
NOTES
1 A screw type terminal may clamp rigid conductors individually
or collectively.
2 Terminals provided for earthing may have one terminal screw
only.
13-1-1 vuqo`fr dks fujh{k.k }kjk tkapk tk ldrk gSA
13.1.1 Compliance shall be checked by inspection.
13-2 isap uqek VfeZuyksa dks ,sls fLFkr fd;k tkuk pkfg, fd
tc VfeZuy osQ isap dks ?kqek;k tk, rc os VfeZuyksa dks ?kweus
ls jksdsaA
13.2 Screw type terminals shall be so located that they
are prevented from rotating when the terminal screws
are turned.
tc [kacs uqek VfeZuy iz;ksx esa yk, tk,a os fuEufyf[kr
t:jrsa iwjh djrs gksa%
When polar type terminals are used they shall meet
the following requirements:
a)
minimum nominal diameter of terminal
screw: 2.5 mm;
b) minimum length of the thread in pillar
through which the terminal screw passes shall
be 2.5 mm;
c) the diameter of the conductor hole shall not
permit a clearance greater than 0.4 mm on
either side of the terminal screw. The screw
shall be long enough under the head to extend
to the far side of the conductor hole. In case
of grub screw the length should be such that
the top of the screw is flushed with the face
of the terminal when tightened fully.
The screw shall have a slightly rounded end,
and the wall of the hole against which the
screw clamps the conductor shall be
unbroken.
13.2.1 Compliance shall be checked by inspection,
measurement and the following test.
d) VfeZuy isap dk vfHkfgr O;kl de ls de 2-5
feeh-_
[k) fiyj esa pwM+h dh yackbZ ftlesa ls VfeZuy isap
xqtjrk gSA de ls de 2-5 feeh- gksuh pkfg,_
x) pkykd ds fy, Nsn dk O;kl&VfeZuy isap dh
izR;sd cxy esa 0-4 feeh- ls vfèkd fuckZèkrk dh
vuqefr u nsA 'kh"kZ ds uhps iasp brus yacs gksa fd os
pkyd ds fy, Nsn ds nwj rd okys fljs rd tk
ldsaA fcuk 'kh"kZ okys isapksa ds ekeys esa isap dh
yackbZ VfeZuy dh Åijh lrg ds cjkcj gksuh
pkfg, tc os vPNh rjg ls dls gksaA
isap dk fljk FkksM+k&lk xksy gks vkSj Nsn dh nhokj
ftlds fo#¼ iasp pkyd dks idM+rk gS] VwVh&iQwVh
ugha gksuh pkfg,A
13-2-1 vuqo`fr dks fujh{k.k vFkok ifjek.k vkSj fuEufyf[kr
ijh{k.kksa ls tk¡pk tk,A
9
vkbZ,l@IS 371 : 1999
1-0 feeh-2 vuqizLFk ifjPNsfnr {ks=k ds dBksj pkyd ;ksX;
ispdl ;k Lisuj ls lkj.kh 1 esa nh xbZ cykèkw.kZ yxkdj ik¡p
ckj dlk o <hyk fd;k tk,A
A rigid conductor of 1.0 mm2 cross-sectional area shall
be tightened and loosened five times by means of a
suitable screwdriver or spanner applying a torque as
shown in Table 1.
fVIi.kh µ ;g t:jh gS fd ijh{k.k ispdl dk iQyd isap ds 'kh"kZ
ds ;ksX; gks vkSj isap >Vdksa esa ugha dlk tkuk pkfg,A
NOTE — It is essential that the shape of the blade of the test
screwdriver suits the head of the screw being tested and that
the screw is not tightened in jerks.
pkyd dks gj ckj igyh txg ls fgyk ysa tc&tc iasp o
f<cjh dks <hyk fd;k tk,A
The conductor shall be moved each time the screw or
nut is loosened.
bl ijh{k.k ds nkSjku] VfeZuy ls dksbZ ,slh rcnhyh u gks
ftlls VfeZuy ds vkxs fy, tkus okys dk;Z esa dksbZ ckèkk u
iM+sA
During the test, no change shall occur that impairs
the further use of the terminal.
lkj.kh 1 VfeZuy isapksa ds fy, cykèkw.kZ eku
([kaM 13-2-1 vkSj 16-2)
Øeka d
la [ ;k
ia s p dk vfHkfgr O;kl
feeh(2)
(1)
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
ix)
;ka f=kd lkeF;Z
2-6
2-6
2-8
3-0
3-2
3-6
4-1
4-7
5-3
dks ysrs gq, vkSj bl rd
ls T;knk vkSj 2-8 dks ysrs
ls T;knk vkSj 3-0 dks ysrs
ls T;knk vkSj 3-2 dks ysrs
ls T;knk vkSj 3-6 dks ysrs
ls T;knk vkSj 4-1 dks ysrs
ls T;knk vkSj 4-7 dks ysrs
ls T;knk vkSj 5-3 dks ysrs
ls T;knk vkSj 6-0 dks ysrs
gq,
gq,
gq,
gq,
gq,
gq,
gq,
gq,
vkSj
vkSj
vkSj
vkSj
vkSj
vkSj
vkSj
vkSj
bl
bl
bl
bl
bl
bl
bl
bl
rd
rd
rd
rd
rd
rd
rd
rd
lkekU; mi;ks x ds fy, ijh{k.k
uhps1) c;ku fd,
iaspksa ds fy,
U;wVu ehVj
(3)
nwljs isapksa vkSj
f<cfj;ksa ds fy,
U;wVu ehVj
(4)
uhps1) c;ku fd,
isapksa ds fy,
U;wVu ehVj
(5)
nwljs isapksa vkSj
f<cfj;ksa ds fy,
U;wVu ehVj
(6)
0-15
0-20
0-25
0-30
0-40
0-70
0-80
0-80
0-80
0-30
0-40
0-50
0-60
0-80
1-20
1-80
2-00
2-50
0-1
0-13
0-16
0-20
0-30
0-40
0-60
0-60
0-60
0-20
0-26
0-32
0-40
0-60
0-80
1-20
1-40
1-60
1)
;g dkye fcuk 'kh"kZ ds iaspksa ds fy, ykxw gSA ;fn iasp tc dlk tk, mldk mHkkj lqjk[k ls Åij u gks vkSj nwljs isapksa ds fy, tks ml
ispdl ls u dls tk ldsa] ftlls iQyd dh pkSM+kbZ isap ds O;kl ls T;knk gksA
Table 1 Terminal Screw Torque Values
(Clauses 13.2.1 and 16.2)
Sl
No.
(1)
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
ix)
Nominal Diameter
of Screw
mm
(2)
Up to and including 2.6
Over 2.6 up to and including 2.8
Over 2.8 up to and including 3.0
Over 3.0 up to and including 3.2
Over 3.2 up to and including 3.6
Over 3.6 up to and including 4.1
Over 4.1 up to and including 4.7
Over 4.7 up to and including 5.3
Over 5.3 up to and including 6.0
Mechanical Strength
Normal Use Test
For Screws
Described Below 1)
Nm
(3)
For Other Screws
and Nuts
Nm
(4)
For Screws
Described Below 1)
Nm
(5)
For Other Screws
and Nut
Nm
(6)
0.15
0.20
0.25
0.30
0.40
0.70
0.80
0.80
0.80
0.30
0.40
0.50
0.60
0.80
1.20
1.80
2.00
2.50
0.1
0.13
0.16
0.20
0.30
0.40
0.60
0.60
0.60
0.20
0.26
0.32
0.40
0.60
0.80
1.20
1.40
1.60
1)
This column applies to screws without heads if the screw, when tightened does not protrude from the hole and to other screws which
cannot be tightened by means of screwdriver with a blade wider than the screw diameter.
10
vkbZ,l@IS 371 : 1999
13-3 fcuk isap okys VfeZuyksa ds fy, ;g vuqefr gS fd os
dBksj vkSj@;k ypdnkj pkydksa ds ;ksX; gksaA
13.3 It is permissible for screwless terminals to be
suitable for rigid and/or flexible conductors.
vxj fcuk isap ds VfeZuy nksuksa dBksj vkSj ypdnkj pkydksa
ds fy, ;ksX; gksa rks igys ijh{k.k dBksj pkydksa ds lkFk fd,
tk,a vkSj ckn esa ypdnkj pkydksa ls nksgjk,aA
If the screwless terminal is suitable for both rigid and
flexible conductors, tests shall carried out with rigid
conductors first and then repeated with flexible conductors.
fcuk iasp okys VfeZuyksa esa ,sls idM+us okys Hkkx gksa ftlesa
rkacs ds pkydksa ftuds vfHkfgr vuqizLFk ifjPNsfnr {ks=k
13-1 ds vuqlkj gksa] dk lgh la;kstu gks ldsA
Screwless terminals shall be provided with clamping
units which allow the proper connection of copper
conductors having nominal cross-sectional areas
complying with 13.1.
fVIif.k;ka
1 fcuk isap okys VfeZuyksa dk iz;ksx dsoy fcuk rS;kjh fd, rkacs ds
pkydksa ds fy, gS] tc nks pkydksa dks tksM+us dh t:jr gks] rc gj
,d pkyd vyx&vyx idM+us okys Hkkx esa j[kk tk,A
2 bl dk eryc t:jh ugha fd vyx&vyx Nsn gksaA fcuk isap
VfeZuy ds Hkkx] ftudk iz;ksx vdlj fo|qr èkkjk ds fy, gS
[kaM 20-3 esa nh gqbZ lkexzh ds cus gksaA
3 fLizax] ypdhys ;wfuV] idM+us dh IysVsa vkSj bu tSlksa dks fo|qr
èkkjk ds fy, iqtsZ ugha ekuk tk,A
NOTES
1 The screwless terminals are intended for the connection of
copper conductors only without special preparation, when two
conductors have to be connected, each conductor shall be
introduced into a separate independent clamping unit.
2 This does not necessarily mean in separate holes. Parts of
screwless terminals mainly intended for carrying current shall
be of materials as specified in 20.3.
3 Springs, resilient units, clamping plates and the like are not
considered as parts mainly intended for carrying current.
13-3-1 vuqo`fr dks fujh{k.k ls tkapk tk,A
13.3.1 Compliance shall be checked by inspection.
13-4 fcuk isap okys VfeZuy ds fMtkbu bl izdkj gkas fd
izR;sd laidZ nkc ds lkFk fuf'pr pkyd dks idM+ lds vkSj
pkyd esa dksbZ {kfr u gksA
13.4 Screwless terminals shall be so designed that they
clamp the specified conductors with sufficient contact
pressure and without undue damage to the conductors.
Conductors shall be deemed to be undudy damaged if
they show deep or sharp indentations.
pkydksa dks vuqfpr :i ls {kfrxr ekuk tk, ;fn mu ij
xgjs ;k rh[ks nrqajrk fn[kkbZ nsaA
The conductor shall be clamped between metal surfaces.
pkyd dks èkkrq ds lrgksa ds chp idM+k tk,A
It shall be clear how the insertion and disconnection of
the conductors is intended to be effected: this may be
with or without the aid of a tool.
;g Li"V gksuk pkfg, fd pkyd dks dSls Mkyuk vkSj
fudkyuk gS % vkStkj ds fcuk ;k vkStkj ls fd;k tk ldrk
gSA
The intended disconnection of a conductor shall require
an operation other than a pull not exceeding 30 N on
the conductor.
pkyd dks lgh <ax ls fudkyus ds fy, pkyd ij ,d [khap
tks rhl U;wVu ls vfèkd u gks] ds vykok ,d dkjZokbZ dh
t:jr gksuh pkfg,A
If openings are provided for the use of a tool intended
to assist the insertion or disconnection, they shall be
clearly distinguishable from the opening intended for
the conductor.
pkyd dks Mkyus ;k fudkyus ds fy, vkStkj mi;ksx djus ds
fy, ;fn Nsn cuk, x, gksa rks og pkyd ds fy, lqjk[kksa esa
vklkuh ls fHkUu fn[kus pkfg,aA
13.4.1 Compliance shall be checked by inspection and
by the tests described in 13.8.
13-4-1 vuqo`fr dks fujh{k.k ls vkSj [kaM 13-8 esa fn, x,
ijh{k.kksa ls tkapk tk,A
13.5 Screwless terminals which are intended to be used
for the interconnection of more than one conductor shall
be so designed that:
13-5 fcuk isap ds VfeZuy tks ,d ls vfèkd pkydksa ds
ijLij la;kstuksa ds fy, iz;qDr fd, x, gksa] mudk fMtkbu
bl rjg gksuk pkfg, fd%
a)
during the insertion, the operation of the
clamping means of one of the conductors is
independent of the operation of that of the
other conductor, and
b) during the disconnection, the conductors can
be disconnected either at the same time or
separately.
d) Nsn esa Mkyrs le; ,d pkyd ds dlus dk izcaèk
nwljs pkyd ds dlus ds izcaèk ls vyx gks] vkSj
[k) Nsn ls fudkyrs le; pkyd bdV~Bs gh ;k
vyx&vyx fudkys tk ldsaA
11
vkbZ,l@IS 371 : 1999
fMtkbZu ds eqrkfcd vfèkd ls vfèkd pkydksa dks vPNh
rjg idM+us dh lqfoèkk gksuh pkfg,A
It shall be possible to clamp securely any number of
conductors up to the maximum as designed.
13-5-1 vuqo`fr dks fujh{k.k vkSj gkFk ls fd, tkus okys
ijh{k.kksa ls mfpr pkydksa (la[;k vkSj lkbZt) dk iz;ksx
djds tk¡pk tk,A
13.5.1 Compliance shall be checked by inspection and
manual tests using the appropriate conductors (number
and size).
13.6 Screwless terminals shall be so designed that
undue insertion of the conductor is prevented and
adequate insertion is obvious.
13-6 ffcuk isap ds VfeZuy bl izdkj ls fMtkbu fd, tk,a
fd pkyd ds v;ksX; fuos'ku dks jksdk tk lds vkSj i;kZIr
fuos'ku Li"V gksA
NOTE — For the purpose of this requirement an appropriate
marking indicating the length of insulation to be removed before
the insertion of the conductor into the screwless terminal may
be put on the ceiling rose or given in an instruction sheet which
accompanies the ceiling rose.
fVIi.kh µ bl mís'; dh iwfr ds fy,] fcuk Nsn ds VfeZuy esa
pkyd Mkyus ls igys pkyd dh fdruh yackbZ ls jksèku dks mrkjk
tk,A lhfyax jksT+k ij mfpr txg ij lwpukadu fd;k tk, ;k lhfyax
jksT+k ds lkFk funsZ'k if=kdk ij ntZ d;k tk,A
13.6.1 Compliance shall be checked by inspection and
by the tests of 13.8.
13-6-1 vuqo`fr dks fujh{k.k ls vkSj [kaM 13-8 esa fn, x,
ijh{k.kksa ls tk¡pk tk,A
13-7 fcuk isap okys VfeZuyksa dks lhfyax jksT+k ij Bhd izdkj
ls fiQV fd;k tk,A pkyd laLFkkiu vkSj lkèkkj.k iz;ksx ds
le; Mkyus vkSj fudkyus ij <hys ugha gksus pkfg,aA
13.7 Screwless terminals shall be properly fixed to the
ceiling rose. They shall not work loose when the
conductors are inserted or disconnected during
installation and in normal use.
fVIi.kh µ fcuk fdlh nwljs <ax ls ykWfdax dh O;oLFkk ds lhy djus
okys ;kSfxd ls doj djuk dkiQh ugha gksxkA VfeZuy ftu ij ;kaf=kd
ruko u iM+rk gks mudks fLFkj djus ds fy, vius vki l[r gksus
okys jsftu iz;ksx fd, tk ldrs gSaA
NOTE — Covering with sealing compound without other means
of locking is not sufficient. Self hardening resins may, however,
be used to fix terminals which are not subject to mechanical
stress in normal use.
13.7.1 Compliance shall be checked by inspection and
by the tests of 13.8.
13-7-1 vuqo`fr dks fujh{k.k ls vkSj [kaM 13-8 esa fn, x,
ijh{k.kksa ls tk¡pk tk,A
13.8 Screwless terminals shall withstand the mechanical
stresses occurring in normal use.
13-8 fcuk isap okys VfeZuy lkekU; mi;ksx esa vkus okys
;kaf=kd ruko dks lgu dj ldsaA
13.8.1 For screwless terminals designed for use with
rigid conductors, compliance shall be checked with
insulated conductors on one screwless terminal of each
ceiling rose.
13-8-1 fcuk isap okys VfeZuy tks dBksj pkydksa ds iz;ksx ds
fy, fMtkbZu fd, x, gksa] dh vuqo`fr dk fujh{k.k gj ,d
lhfyax jksT+k ds ,d fcuk isap okys VfeZuy esa jksfèkr pkyd
Mkydj fd;k tk,A
The test is carried out with solid copper conductors,
first with conductors having the largest cross-sectional
area, and then as specified in 13.1.
;g ijh{k.k dBksj rkacs ds pkydksa ds lkFk fd, tk,a] igys
vfèkdre vuqizLFk ifjPNsfnr {ks=k okys pkyd ls fd;k tk,]
fiQj tSls [kaM 13-1 ls fuf'pr fd;k x;k gSA
Conductors are inserted and disconnected five times,
new conductors being used each time, except for the
fifth time when conductors used for the fourth insertion
are clamped at the same place.
pkyd dks ik¡p ckj VfeZuy esa Mkyk vkSj fudkyk tk,] gj
ckjh u, pkyd iz;ksx esa yk,a] ik¡poha ckjh ds vykok tc
pkSFkh ckj Mkys x, pkyd dh txg ij idM+k tk,A
For each insertion, the conductors are either pushed as
far as possible into the terminal or are inserted so that
adequate connection is obvious.
gj ,d fuos'ku esa pkydksa dks VfeZuy esa tgka rd laHko gks
èkdsyk tk, ;k bruk pkyd Mkyk tk, ftlls i;kZIr la;kstu
Li"V :i ls gks tk,A
gj fuos'ku ds ckn 10 U;wVu dk èk"kZ.k Hkkj yxk;k tk,A
?k"kZ.k Hkkj fcuk >Vdksa ds ,d feuV ds fy, pkyd ds LFkku
dks ns'kkUrj js[kk ds v{k dh fn'kk esa yxk, tk,A
After each insertion, the conductor is subjected to a
pull of 10 N, the pull is applied without jerks for 1
min, in the direction of the longitudinal axis of the
conductor space.
?k"kZ.k dh izfØ;k ds nkSjku pkyd fcuk isap okys VfeZuyksa ls
ckgj ugha vkus pkfg,aA
During the application of the pull, the conductor shall
not come out of the screwless terminals.
12
vkbZ,l@IS 371 : 1999
The test is then repeated with rigid stranded copper
conductors having the largest and smallest crosssectional areas specified in 13.1. These conductors, are,
however, inserted and connected only once.
;g ijh{k.k rc dBksj rkacs ds rUrquqek pkydksa ftudk
vuqizLFk ifjPNsfnr {ks=k vfèkdre vkSj U;wure tSlk fd [kaM
13-1 esa fuf'pr fd;k x;k gS ij nksgjk,A fdarq ;s pkyd
dsoy ,d ckj gh VfeZuyksa esa Mkys vkSj fudkys tk,aA
After the tests, neither the terminals nor the clamping
means shall have worked loose and the conductors shall
show no deterioration impairing their further use.
bl ijh{k.k ds ckn u gh VfeZuy <hys gksa] vkSj u gh idM+us
ds lkèkuksa vkSj pkydksa }kjk vkxs fy, tkus okys dk;Z esa dksbZ
[kjkch fn[kkbZ nsA
13.8.2 For screwless terminals designed for use with
flexible conductors, compliance shall be checked with
insulated conductors on one screwless terminal on each
ceiling rose.
13-8-2 fcuk isap ds VfeZuy tks ypdhys pkydksa ds mi;ksx
ds fy, fMtkbu fd, x, gksa] dh vuqo`fr dks gj ,d lhfyax
jksT+k ds ,d fcuk iasp ds VfeZuy esa jksfèkr pkyd Mkydj
tk¡pk tk,A
The test is carried out with flexible copper conductors,
first with conductors having the smallest cross-sectional
area as specified in 13.1.
;g ijh{k.k ypdhys rkacs ds pkydksa ds lkFk fd;k tk,]
igys U;wure vuqizLFk ifjPNsfnr {ks=k okys pkyd ls fd,
tk,a tSlk fd [kaM 13-1 esa fuf'pr fd;k x;k gSA
Conductors are inserted and disconnected five times,
new conductors being used each time, except for the
fifth time when conductors used for the fourth insertion
are clamped at the same place.
pkydksa dks ik¡p ckj VfeZuy esa Mkyk vkSj fudkyk tk, gj
ckj u, pkyd iz;ksx esa yk,a] ik¡poh ckjh ds vykok tc
pkSFkh ckj Mkys x, pkyd dh txg ij idM+k tk,A
For each insertion the conductors are either pushed as
far as possible into the terminal or are inserted so that
adequate connection is obvious.
gj ,d fuos'ku esa pkydksa dks VfeZuy esa tgka rd laHko gks
èkdsyk tk, ;k bruk pkyd Mkyk tk, ftlls i;kZIr la;kstu
Li"V #i ls gks tk,A
gj ckj pkyd Mkyus ds ckn 10 U;wVu dk ?k"kZ.k Hkkj yxk;k
tk,A ?k"kZ.k Hkkj fcuk >Vdksa ds ,d feuV ds fy, pkyd ds
LFkku dks ns'kkUrj js[kk ds v{k dh fn'kk esa yxk;k tk,A
After each insertion, the conductor is subjected to a
pull of 10 N, the pull is applied without jerks for 1 min
in the direction of the longitudinal axis of the conductor
space.
?k"kZ.k dh izfØ;k osQ nkSjku pkyd fcuk isap okys VfeZuyksa ls
ckgj ugha vkus pkfg,aA
During the application of the pull, the conductor shall
not come out of the screwless terminal.
bl ijh{k.k ds ckn u gh VfeZuy <hys gksa vkSj u idM+us ds
lkèku vkSj pkydksa }kjk vkxs fy, tkus okys dk;Z esa dksbZ
[kjkch fn[kkbZ nsA
After the tests, neither the terminals nor the clamping
means shall have worked loose and the conductors shall
show no deterioration impairing their further use.
13.8.3 For screwless terminals designed for use with
both rigid and flexible conductors, compliance shall
be checked with insulated conductors having crosssectional area as specified in 13.1.
13-8-3 fcuk isp
a okys VfeZuy tks dBksj vkSj ypdnkj nksuksa izdkj
ds pkydksa ds iz;ksx ds fy, fMtkbu fd, x, gksa fd vuqof` r dk
fujh{k.k jksfèkr pkyd ftudk vuqiLz Fk ifjPNsfnr {ks=k [kaM 13
13-- 1
esa fuf'pr fd;k x;k gS] ds iz;ksx ds }kjk fd;k tk,A
pkydksa dks ik¡p ckj VfeZuy esa Mkyk vkSj fudkyk tk,A gj
ckj u, pkyd iz;ksx esa yk,] ik¡poha ckj ds vykok tc
pkyd pkSFkh ckj VfeZuy esa Mkydj ,d gh LFkku ls idMa+sA
Conductors are inserted and disconnected five times,
new conductors being used each time, except for the
fifth time when conductors used for the fourth insertion
are clamped at the same place.
gj ,d fuos'ku esa pkydksa dks VfeZuy esa tgka rd laHko gks
èkdsyk tk, ;k bruk Mkyk tk, ftlls i;kZIr la;kstu Li"V
:i ls gks tk,A
For each insertion, the conductors are either pushed as
far as possible into the terminal or are inserted so that
adequate connection is obvious.
gj ckj VfeZuy esa pkyd Mkyus ds ckn 10 U;wVu dk ?k"kZ.k Hkkj
yxk;k tk,A ?k"kZ.k Hkkj fcuk >Vdksa ds ,d feuV ds fy, pkyd
ds LFkku dh ns'kkUrj js[kk ds v{k dh fn'kk esa yxk;k tk,A
After each insertion the conductor is subjected to a pull
of 10 N, the pull is applied without jerks, for 1 min,
in the direction of the longitudinal axis of the
conductor space.
?k"kZ.k Hkkj yxkrs le; pkyd fcuk isap okys VfeZuy ls ckgj
ugha vkuk pkfg,A
During the application of the pull, the conductor shall
not come out of the screwless terminal.
13
vkbZ,l@IS 371 : 1999
The test is then repeated with rigid stranded copper
conductors having the largest and smallest crosssectional areas specified in 13.1. These conductors are,
however, inserted and disconnected only once.
rc ;g ijh{k.k rk¡cs ds vfèkdre vkSj U;wure vuqizLFkk
ifjPNsfnr gksus okys n`<+ yM+nkj pkyd tSlk fd [kaM 13-1
esa fuf'pr fd;k x;k gS] ls nksgjk,aA ;s pkyd] tSls Hkh gks]
osQoy ,d ckj VfeZuyksa esa Mkys vkSj fudkys tk,aA
The test is then repeated with flexible copper
conductors having the largest and smallest crosssectional areas specified in 13.1. These conductors are
however, inserted and disconnected only once and the
pull is reduced to 10 N.
rc ;g ijh{k.k ypdnkj rkacs ds vfèkdre vkSj U;wure
vuqizLFkk ifjPNsfnr {ks=k okys pkyd tSlk fd [kaM 13-1 esa
fuf'pr fd;k x;k gS] ls nksgjk,aA ;s pkyd tSls Hkh gks dsoy
,d ckj VfeZuyksa esa Mkys vkSj fudkys tk,a rFkk ?k"kZ.k Hkkj
?kVkdj 10 U;wVu dj fn;k tk,A
After the tests, neither the terminals nor the clamping
means shall have worked loose and the conductors shall
show no deterioration impairing their further use.
bl ijh{k.k ds ckn u gh VfeZuy <hys gksa vkSj u gh idM+us
ds lkèku vkSj pkydksa }kjk vkxs fy, tkus okys dk;Z esa dksbZ
[kjkch fn[kkbZ nsA
13.9 Screwless terminals shall withstand the electrical
and thermal stresses occurring in normal use.
13-9 fcuk isap ds VfeZuy lkèkkj.k iz;ksx esa fctyh vkSj rki
ls iSnk gksus okys ruko dks lgu dj ldsaA
13.9.1 Compliance shall be checked by the tests
described in 13.9.2 and 13.9.3 which are carried out
on five screwless terminals of ceiling roses which have
not been used for any other test. Both tests shall be
carried out with unused copper conductors.
13-9-1 vuqo`fr dks [kaM 13-9-2
13-9-2] 13-9-3 esa fn, x,
ijh{k.kksa ls tk¡pk tk ldrk gSA ;g lhfyax jksT+k ds ik¡p fcuk
isap okys VfeZuyksa tks fdlh nwljs ijh{k.k ds fy, iz;ksx esa u
yk, x, gksa] ds Åij fd, tk,¡A nksuksa ijh{k.k fcuk iz;ksx
fd, rkacs ds pkydksa ds lkFk fd, tk,a¡A
13.9.2 The test is carried out loading the screwless
terminals for 1 h with an alternating current, as specified
in Table 2, when connected to 1 m long conductors
having the cross-sectional area as specified in the same
table and using the type of conductor, that is, rigid or
flexible, applicable to the terminal. The test is carried
out on each clamping unit.
13-9-2 ;g ijh{k.k fcuk iasp okys VfeZuyksa ij lkj.kh 2 esa
nh xbZ ,dkUrj èkkjk ,d ?kaVs rd xqtkjus ds fy, ,d ehVj
yacs lkj.kh 2 esa fn, x, vuqizLFk ifjPNsfnr {ks=k okys
pkydksa ls tksM+sa vkSj VfeZuy esa dke esa ykus ;ksX; dBksj vkSj
ypdnkj pkydksa dk iz;ksx djsaA ;g ijh{k.k gj ,d idM+us
okys ;wfuV ij fd;k tk,A
During the test the current is not passed through the
ceiling rose but only through the terminals.
bl ijh{k.k ds nkSjku èkkjk dks VfeZuy ls xqtkjk tk,] lhfyax
jksT+k ls ughaA
Immediately after this period the voltage drop across
each clamping unit is measured with rated current
following. In no case shall the voltage drop exceed 15
mV. The measurements shall be made across each
clamping unit and as near as possible to the place of
contact.
bl le; ds rqjra ckn gjsd idM+us okys ;wfuV ds chp ftlesa
izekf.kr èkkjk cg jgh gS] oksYVrk MªkWi ukik tk,A fdlh Hkh
fLFkfr esa oksYVrk MªkWi 15 feyhoksYV ls vfèkd u gksA ;g
ifjek.k gj ,d idM+us okys ;wfuV ds chp vkSj ftruk laHko
gks lds tksM+ ds utnhd ls fy, tk,¡A
NOTES
1 If the back connection of the terminal is not accessible the
ceiling roses may be suitably prepared by the manufacturer.
Care should be taken not to affect the behaviour of the terminals.
fVIif.k;ka
1 ;fn ihNs okys VfeZuy rd igqap laHko u gks] rks mRiknd lhfyax
jksT+k dh mfpr rS;kjh djk ldrk gSA èk;ku j[ksa fd VfeZuy ds
O;ogkj ij vlj u gksA
2 ;g t:jh gS fd è;ku j[kk tk, fd ijh{k.k ;k ekiu ds le; ds
nkSjku pkyd vkSj ekiu LFkku VfeZuy esa fgy u tk,aA
2 It is essential that care is taken to ensure that, during the
period of the test, including the measurements, the conductors
and the measurements taps cannot move noticeably in the
terminals.
13-9-3 la;kstu ftudk [kaM 13-9-2 osQ vuqlkj oksYVrk MªkWi
dj fy;k gks muds ijh{k.k fuEufyf[kr vuqlkj djsaA
13.9.3 The connections already subjected to the
determination of the voltage drop specified in 13.9.2
are tested as follows.
ijh{k.k ds nkSjku ijh{k.k èkkjk tks fd lkj.kh 2 esa nh xbZ
fctyh èkkjk eku ds cjkcj gks] xqtkjh tk,A
During the test, a current equal to the test current value
given in Table 2 is passed.
14
vkbZ,l@IS 371 : 1999
Table 2 Test Current
(Clauses 13.9.2 and 13.9.3)
lkj.kh 2 ijh{k.k èkkjk
([kaM 13-9-2 vkSj 13-9-3)
Sl
No.
Øekad fcuk is ap ds VfeZu y ij ijh{k.k ds fy, ijh{k.k èkkjk,a
pkyd dk vuqizLFk ifjPNsfnr {ks=k
Test Currents for Test on Screwless Terminals
ijh{k.k èkkjk
feeh-2
(1)
(1)
(2)
(3)
i)
ii)
1-0
1-5
10
15
i)
ii)
Cross-Sectional Area of the
Conductor
mm2
(2)
Test Current
1.0
1.5
10
15
(3)
The whole test arrangement, including the conductors,
shall not be moved until the measurements of the
voltage drop have been completed.
pkydkas lesr lkjh ijh{k.k O;oLFkk dks u fgyk;k tk, tc
rd cksYVrk MªkWi osQ lkjs ifjek.k iwjs u dj fy, tk,¡A
The connections are subjected to 192 cycles, each cycle
having a duration of approximately 1 h and being
carried out as follows:
la;kstuksa dks 192 pØksa }kjk tk¡ps gj ,d pØ dh vofèk
yxHkx ,d ?kaVs dh gks] vkSj fuEufyf[kr vuqlkj fd,
tk,¡%
a)
with the current flowing, for approximately
30 min;
b) for a further 30 min approximately, with no
current flowing.
The voltage drop in each clamping unit is determined
as described in 13.9.2 after each 24 cycles and after
the 192 cycles have been completed. In no case shall
the voltage drop exceed 22.5 mV. After this test an
inspection by normal or corrected vision without
additional magnification shall show no changes
evidently impairing further use such as cracks,
deformations or the like.
d) yxHkx 30 feuV ds fy, èkkjk izokgu ds lkFk]
[k) vxys yxHkx 30 feuV ds fy, fcuk èkkjk izokgu
ds lkFkA
gjsd 24 pØksa ds ckn vkSj 192 pØksa ds iwjk djus ds ckn
gjsd idM+us okys ;wfuV ds chp 13-9-2 esa o.kZu dh oksYVrk
MªkWi uksV djsaA fdlh Hkh fLFkfr esa oksYVrk MªkWi 22-5 feyhoksYV
ls vfèkd u gksA bl ijh{k.k ds ckn ,d fujh{k.k lkekU; ;k
lgh dYiuk }kjk fcuk vfrfjDr vfr'k;ksfDr ds }kjk fy,
tkus okys dk;Z esa dksbZ Li"V ifjorZu fn[kkbZ u ns tSlk fd
njkjsa] fo:i.k ;k bu tSlkA
blls vfèkd 13-8 esa of.kZr ;kaf=kd lkeF;Z ijh{k.k nksgjk,a
vkSj lHkh ik¡p VfeZuy bl ijh{k.k dks lgu dj ldsaA
Furthermore the appropriate mechanical strength test
described in 13.8 is repeated and all five terminals
shall withstand this test.
14 fuekZ.k
14 CONSTRUCTION
14-1 ;gka fo|qr >Vds ds fo#¼ j{kk vkèkkj ds Åij vkoj.k
,slh fdlh vVSpeSaV }kjk dldj fd;k x;k gks] ,sls fgLls
lkekU; mi;ksx esa yxus okys cy dks lgu dj ldsaA
14.1 Where protection against electric shock is
provided by a cover screwing on to a base, or by similar
attachment, such parts shall withstand the forces likely
to be applied in normal use.
14-1-1 vuqo`fr ds ,sls fgLlksa dks gkFk ls nl ckjh yxkdj
vkSj mrkjdj tk¡pk tk ldrk gS] gj ckjh ijh{k.k vèkhu Hkkx
dks blds ckgjh O;kl ds 0-03 xq.kk U;wVu ehVj ls cykèkw.kZ
yxkdj dlk tk,A
14.1.1 Compliance shall be checked by removing and
replacing such parts by hand 10 times, tightening each
time with a torque, in newton metres, equal to 0.03
times the outside diameter, in millimetres, of the part
under test.
14-2 vkbZ,l 694 ds vuqlkj xksykdkj ypdnkj rkj ftlesa
1-0 feeh-2 ds rhu pkyd gkas ds nkf[kys vkSj la;kstuksa dk
izcaèk gksA
14.2 Provision shall be made for the entry and
connection of a circular flexible cord having three
conductors of 1.0 mm and complying with IS 694.
nkf[kys ds lkèku eqyk;e fpdus gksa rkfd rkj dh 'khFk ij
[kjksap ;k vU; {kfr u igqapsA
The means of entry shall be smooth and shall not cause
abrasion or other damage to the sheath of the cord.
14-2-1 vuqo`fr dks 1-00 feeh-2 dh rhu dksj ypdnkj rkj
ls tksM+dj fujh{k.k fd;k tk,A
14.2.1 Compliance shall be checked by connection of
the 3 core, 1.00 mm 2, flexible cord followed by
inspection.
15
vkbZ,l@IS 371 : 1999
14-3 lhfyax jksT+k dks tksM+s x, ypdnkj pkydksa ij ruko]
tks VfeZuy rd igqap ldrk gS fd eqfDr ds fy, ,d ;a=k
;k jksèku lkexzh ds mfpr lkèkuksa dh lqfoèkk gksuh pkfg,A
14.3 A device or means of insulating material, referred
to herein as a strain relief, shall be provided, to prevent
strain upon flexible conductors, connected to the ceiling
rose, being transmitted to the terminals.
14-3-1 vuqo`fr dks fuEufyf[kr ijh{k.k }kjk tkapk tk,A
lhfyax jksT+k esa 2&dksj] 0-5 feeh-2 xksy lhFkM okyh ypdnkj
rkj tks fd vkbZ,l 694 vuqlkj gks] ls fiQV fd;k tk, vkSj
VfeZuy iasp dsoy brus dls tk,a fd pkyd VfeZuy ls ckgj
u fiQlys ij brus T;knk dls u tk,a fd ruko fuokj.k lkèku
ij vlj gksA
14.3.1 Compliance shall be checked by the following
test. The ceiling rose shall be fitted with 2-core, 0.5
mm2, circular sheathed flexible cord complying with
IS 694 the terminal screws shall be tightened only
sufficiently to stop the conductors slipping out of the
terminals but not sufficiently to influence the
effectiveness of the strain relief.
;s lkèku blds fMtkbZu ds vuqlkj dlk tk, tSlk fd
lkekU; mi;ksx esa djrs gSaA ;fn ruko fuokj.k lkèku esa
,d ;k T;knk isap yxs gksa rks budks lkj.kh 1 esa nh xbZ
la[;k ds nks frgkbZ cykèkw.kZ ls dlk tk,A ;fn ruko
fuokj.k lkèku lacafèkr isap okys Hkkxksa ds bdV~Bs dls tkus
ij fuHkZj gks rc bls 14-1 esa nh gqbZ la[;k ds nks frgkbZ
cykèkw.kZ ls dlk tk,A rkj dks lkekU; mi;ksx okyh fn'kk
esa 25 U;wVu ds ?k"kZ.k Hkkj ls 1 feuV ds fy, [khapk tk,A
bl ijh{k.k dks rhu ckj nksgjkds gj ckj gj ijh{k.k ds ckn
cy gVk,¡A
The device shall then be tightened in a manner
appropriate to its design, as in normal use. If the strain
relief incorporates one or more screws, then these shall
be tightened with a torque equal to two-thirds of the
appropriate value given in Table 1. If the strain relief
relies upon the screwing together of related threaded
parts, then such parts shall be tightened with a torque
equal to two-thirds of the value specified in 14.1. The
cord shall be subjected to a pull of 25 N for 1 min
steadily applied in the direction of the axis of the cord
in normal use. The test shall be applied three times, the
force being removed after each test.
ijh{k.kksa dh lekfIr ij pkyd VfeZuyksa esa bruk u fgys tks
uksfVl esa vk, vkSj pkyd dh jksèku dks dksbZ {kfr u gks]
ftlls pkyd vukofjr gks tk,A ijh{k.k ds var esa rkj
2 feeh- ls T;knk ugha fgyuh pkfg,A
At the conclusion of the tests, the conductors shall not
have moved noticeably in the terminals and there shall
be no damage to the conductor insulation such as to
expose the conductor. At the end of the test the cord
shall not have moved more than 2 mm.
14-4 lhfyax jksT+k fuEufyf[kr Hkkj mBkus ;ksX; gks%
14.4 The ceiling rose shall be capable of carrying a
load as follows:
d) 8-1([k)(1) ds vuqlkj oxhZd`r lhfyax jksT+k ds
fy, 2-5 fdyksxzkeA
[k) 8-1([k)(2) ds vuqlkj oxhZd`r lhfyax jksT+k ds
fy, 2-5 fdyksxzke ;k vfèkdre tSlk mRiknd
}kjk uketn fd;k x;k gksA
a)
Ceiling roses classified in accordance with
8.1(b)(1): 2.5 kg.
b) Ceiling roses classified in accordance with
8.1(b)(2): 2.5 kg or higher as nominated by
the manufacturer.
14-4-1 vuqo`fr dks fujh{k.k }kjk vkSj fuEufyf[kr ijh{k.kksa
}kjk tk¡pk tk,A
14.4.1 Compliance shall be checked by inspection and
by the following test.
lhfyax jksTk+ dks vkbZ,l 694 dh lkj.kh 6 esa nh xbZ 1-0
feeh-2 xksykdkj tqM+oka yphyh rkj ls fiQV djds lkekU;
mi;ksx esa f{kfrt ds lekukUrj lrg ds uhps yxk, x,
lhfyax jksT+k lqjf{kr gksaA VfeZuy isapksa dks lkekU; mi;ksx ds
fy, lkj.kh 1 esa fuf'pr cykèkw.kZ ls dlk tk, vkSj ruko
ds cpko dk ;a=k ;k dlus ds lkèku 14-3 ds vuqlkj dls
tk,aA lhfyax jksT+k ls ypdnkj rkj }kjk 5 fdyksxzke ijh{k.k
Hkkj yVdk;k tk, vkSj bl midj.k dks 24 ?kaVs dh vofèk
ds fy, 40 ± 5°lsa- rkieku d{k esa j[kk tk,A
The ceiling rose shall be secured as in normal use to
the underside of a horizontal surface and fitted with a
1.0 mm2 circular twin flexible cord complying with
Table 6 of IS 694. The terminal screws shall be
tightened with the torque values for normal use
specified in Table 1 and the strain relief device or means
shall be tightened as specified in 14.3. A test load of 5
kg shall be suspended from the ceiling rose via the
flexible cord and the equipment placed in an oven at a
temperature of 40 ± 5°C for a period of 24 h.
bl ijh{k.k ds [kRe gksus rd Hkkj yVdk gksuk pkfg, vkSj
lhfyax jksT+k vHkh Hkh mi;ksx ds ;ksX; gks vkSj 11 ds vuqlkj
vkSj tgka ykxw gS] 14-1 vkSj@;k 14-2 ds vuqlkj Hkh lgh gksA
At the conclusion of the test the load shall still be
supported, the ceiling rose shall remain in a usable
condition and shall comply with 11 and, where
appropriate, 14.1 and/or 14.2.
16
vkbZ,l@IS 371 : 1999
8-1([k)(2) ds vuqlkj oxhZd`r lhfyax jksT+k ds fy, Åij ds
ijh{k.k fd, tk,a vkSj mRiknd }kjk fuf'pr fd, x, Hkkj ds
lkFk nks ckj nksgjk,a] ypdnkj rkj }kjk dksbZ Hkkj ifjorZu u
gksA
For ceiling roses classified in accordance with 8.1(b)(2)
the above test is carried out and then repeated with twice
the load nominated by the manufacturer with no load
being transmitted through the flexible cord.
bl ijh{k.k ds [kRe gksus rd Hkkj yVdk gksuk pkfg, vkSj
lhfyax jksT+k vHkh mi;ksx ds ;ksX; gks vkSj 10 ds vuqlkj
vkSj tgka ykxw gS] 14-1 vkSj@;k 14-2 ds vuqlkj Hkh lgh
gksA
At the conclusion of the test the load shall still be
supported, the ceiling rose shall remain in a usable
condition and shall comply with 10, and where
appropriate, 14.1 and/or 14.2.
15 ueh vkS j xhys i u ds iz f r fo|q r jks è ku
iz f rjks f èkrk vkS j fo|q r lkeF;Z
15 RESISTANCE TO MOISTURE AND
HUMIDITY, INSULATION RESISTANCE AND
ELECTRIC STRENGTH
15-1 lhfyax jkst ds phuh feV~Vh ds iqtksZa dh vknZzrk xzkgh u
gksuk gh dkiQh gSA ueh izfrjksfèkrk dk¡fpr fd, ;k jksxu fd,
;k ,sls lkeku lrg ds O;ogkj ij fuHkZj ugha gksuh pkfg,A
15.1 Ceramic parts of ceiling roses shall be sufficiently
non-hygroscopic. The resistance to moisture shall not
depend on glaze or varnish or similar surface treatment.
15-1-1 vuqo`fr dks fuEufyf[kr ijh{k.k ls tkapk tk,A phuh
feV~Vh ds Hkkxksa dks 24 ?kaVs dh vofèk ds fy, 15°lsa- ls
35°lsa- ds chp fdlh Hkh rkieku ij vkSj 45 ls 75 izfr'kr
visf{kd vknzZrk esa vuqdwyu ds fy, j[ksa vkSj blds ckn
15°lsa- ls 35°lsa- ds chp fdlh Hkh rkieku ij 24 ?kaVs dh
vofèk ds fy, vklqr ty esa foeftZr fd;k tk,A bl vofèk
ds var esa ;s Hkkx fudky fy, tk,a] vkSj lrg ij fn[kus
okyh ikuh dh lHkh cwans iksaNus ds ckn] bu iqtksZa dk Hkkj
1-0 izfr'kr ls c<+uk ugha pkfg,A
15.1.1 Compliance shall be checked by the following
test. Ceramic parts shall be conditioned for 24 h at any
temperature between 15°C to 35°C and 45 percent
relative humidity to 75 percent relative humidity and
then immersed in distilled water for 24 h at any ambient
temperature between of 15°C to 35°C. At the end of
this period the parts shall be removed and, after all
visible water has been wiped from the surface, the mass
of the parts shall not have increased by more than 1.0
percent.
15-2 lhfyax jksT+k ds IykfLVd ds iqtsZ vknzZrkxzkgh jfgr gksus
pkfg,aA ueh izfrjksfèkrk dk¡fpr dh ;k jksxu dh ;k blh
leku dh lrg ds O;ogkj ij fuHkZj ugha gksuk pkfg,A
15.2 Plastics parts of ceiling roses shall be sufficiently
non-hygroscopic. The resistance to moisture shall not
depend on glaze or varnish or similar surface treatment.
15-2-1 vuqo`fr dks fuEufyf[kr ijh{k.k ls tkapk tk,A
IykfLVd ds iqtksZa dks 24 ?kaVs dh vofèk ds fy, 15°lsa- ls
35°lsa- ds chp fdlh Hkh rkieku ij vkSj 45 ls 75 izfr'kr
visf{kr ueh esa vuqdwyu ds fy, j[ksa vkSj blds ckn 15°lsals 35°lsa- ds chp fdlh Hkh rkieku ij 48 ?kaVs dh vofèk
ds fy, vklqr ty essa fuefTtr fd;k tk,A vofèk ds var
esa Hkkx fudky fy, tk,a vkSj lrg ij fn[kus okyh ikuh dh
lHkh cwans iksaNus ds ckn 'kDy esa dksbZ ifjorZu] iQwyuk] rg
dk vyx gksuk ;k dksbZ oqQ:irk u gks ftlls lhfyax jksT+k ds
iz;ksx esa ckèkk vk,A
15.2.1 Compliance shall be checked by the following
test. Plastics parts shall be conditioned for 24 h at any
ambient temperature between 15°C to 35°C and 45
percent relative humidity to 74 percent relative humidity
and then immersed in distilled water for 48 h at any
ambient temperature between 15°C to 35°C. At the end
of this period the parts shall be removed and, after all
visible water has been wiped from the surface, there
shall be no distortion, swelling, delamination or other
deformation which would impair the function of the
ceiling rose.
15-3 iwjk lhfyax jksT+k lkekU; mi;ksx esa vknzZrk iSnk gksus
okyh fLFkfr;ksa ls fuizHkkfor gksA
15.3 Complete ceiling roses shall be proof against
humid conditions that may occur in normal use.
15-3-1 vuqo`fr dks vknzZrk mipkj ls tks bl mi[kaM esa
O;Dr fd;k x;k gS] ds rqjar ckn jksèku izfrjksèkrk ekaisa vkSj
fo|qr lkeF;Z ijh{k.kksa ls tSls 15-5 vkSj 15-6 esa O;Dr fd,
x, gSa] tk¡pk tk,A
15.3.1 Compliance shall be checked by the humidity
treatment described in this subclause followed
immediately by the measurement of the insulation
resistance and by the electric strength tests described
in 15.5 and 15.6.
rkj ds nkf[kys] vxj dksbZ gS mls [kqyk j[ksa] vxj ukd~ vkÅV
yxk, x, gSa muesa ls ,d dks [kqyk j[kk tk,A
Cable entries, if any, shall be left open; if knock-outs
are provided one of them shall be opened.
17
vkbZ,l@IS 371 : 1999
ueh mipkj 91 vkSj 95 izfr'kr ds chp visf{kr ueh okyh
gok okys vknzZrk d{k esa fd;k tk,A lHkh LFkkuksa ij tgka&tgka
uewuksa dks j[kk tk ldrk gS_ ogka gok dk rkieku 15°lsa- vkSj
35°lsa- ds chp fdlh Hkh eku ij ftldh xqatkbZ'k Åij uhps
IK rd gks] esa j[kk tk,A
The humidity treatment shall be carried out in a
humidity cabinet containing air with a relative
humidity maintained between 91 percent and 95
percent. The temperature of the air, at all places where
samples can be located, shall be maintained within
IK of any convenient value between 15°C and 35°C.
vknZrz k d{k esa j[kus ls igys_ lhfyax jksTk+ dk rkieku t°ls-a vkSj
t°$4°ls-a ds chp yk;k tk,A lhfyax jksTk+ dks 48 ?kaVs dh vofèk
ds fy, d{k esa j[kk tk,A bl mipkj ds ckn] lhfyax jksTk+ esa
dksbZ {kfr u vk, tks bl ekud dh vuqo`fr ij vlj djsA
Before being placed in the humidity cabinet, the ceiling
roses shall be brought to a temperature between t°C
and t + 4°C. Ceiling roses shall be kept in the cabinet
for 48 h. After this treatment, the ceiling roses shall
show no damage that affects compliance with this
standard.
fVIif.k;ka
1 T;knkrj fLFkfr;ksa esa lhfyax jkst dks vknzZrk mipkj esa ikus ls igys
mudks fuf'pr fd, x, rkieku ij ykus ds fy, de ls de 4 ?kaVs
ds fy, bl rkieku ij j[kk tk,A
2 91 çfr'kr vkSj 95 çfr'kr ds chp vkisf{kr vknzZrk (xhykiu)
lksfM;e lYiQsV ;k iksVkf'k;e ukbZVªsV ds ikuh esa lar`Ir ?kksy dks
vknzZrk d{k ftlesa gok T;knk ls T;knk Li'kZ gks esa j[k dj izkIr dh
tk ldrh gSA d{k esa fuf'pr fLFkfr iSnk djus ds fy, ;g t:jh gS
fd mlesa yxkrkj gok cgko cuk jgs vkSj vke rkSj ij rki jksèkh d{k
dk iz;ksx fd;k tk,A
NOTES
1 In most cases, the ceiling roses may be brought to the specified
temperature by keeping them at this temperature for at least
4 h before the humidity treatment.
2 Relative humidity between 91 percent and 95 percent can be
obtained by placing in the humidity cabinet a saturated solution
of sodium sulphate (Na2SO4) or potassium nitrate (KNO3) in
water, having a sufficiently large contact surface with the air.
In order to achieve the specified conditions within the cabinet,
it is necessary to ensure constant circulation of the air within
and, in general, to use a cabinet that is thermally insulated.
15-4 jksfèkrk bu Hkkxksa ds chp izHkkoiw.kZ gks%
15.4 Insulation shall be effective between:
d) 'kfDriw.kZ Hkkxksa ds fojksèkh èkqzo_ vkSj
[k) 'kfDriw.kZ Hkkxksa ds fojksèkh èkzqoksa dks bdV~Bs tksM+dj
vkSj nwljs èkkrq ds iqtsZ tks buls jksfèkr fd, x, gSa]
vFkZ fd, èkkrq ds iqtksZa ds lfgrA
a) live parts of opposite polarity; and
b) live parts of opposite polarity connected
together, and other metal parts insulated
therefrom, including earthed metal parts.
15.4.1 Compliance shall be checked by the tests
described in 15.5 and 15.6.
15-4-1 vuqo`fr dks 15-5 vkSj 15-6 esa C;ku fd, ijh{k.kksa
}kjk tk¡pk tk,A
15-5 jksèku izfrjksfèkrk dks yxHkx 500 oksYV Mhlh oksYVrk ds
lkFk ekik tk,A 15-4 esa fuf'pr fd, x, IokabVksa ds chp
ckjh&ckjh oksYVrk ds vuqiz;ksx ds ,d feuV ckn ;s ifjek.k
fy, tk,aA jksèku izfrjksfèkrk 5 esxk vksgel ls de u gksA
15.5 The insulation resistance shall be measured with
a dc voltage of approximately 500 V, the measurement
being made 1 min after the application of the voltage
consecutively between the points defined in 15.4. The
insulation resistance shall be not less than 5 MΩ.
15-6 15-5 esa fuf'pr fd, ijh{k.k ds rqjar ckn ,lh
oksYVrk tks dkiQh gn rd 50 gVZT+k dh vko`fr ds lkFk lkbZu
osc esa gks vkSj 2 000 oksyV vkj,e,l eku 15-4 esa fn, x,
fcanqvksa ds chp ,d feuV ds fy, yxk;k tk,A 'kq: esa
fuf'pr oksYVrk vkèks ls T;knk u yxkbZ tk, fiQj bldks
tYnh ls fu/kkZfjr eku rd c<+k;k tk,A
15.6 Immediately after the test specified in 15.5 an ac
voltage of substantially sine-wave form with a
frequency of 50 Hz and with an rms value of 2 000 V
shall be applied for 1 min between the points defined
in 15.4. Initially not more than half the prescribed
voltage shall be applied, then it shall be raised rapidly
to the required value.
dksbZ fcxkM+ ;k vfèkd LikdZ ugha gksuk pkfg,A oksYVrk esa
fcuk fxjkoV gq, nhfIr fMLpkjtksa dks u ekuk tk,A
No breakdown or flashover shall occur. Glow
discharges without drop in voltage are ignored.
15-7 ÝyS'k ijh{k.k
15.7 Flash Test
useh ijh{k.k ds :i esa mPp oksYVrk ijh{k.k ÝyS'k ijh{k.k ds
:i esa fd;k tk ldrk gS ftlesa [kaM 15-4 esa mfYyf[kr ds
vuqlkj lHkh Hkkxksa ds chp esa ,d lsfdaM dh vofèk ds fy,
2 000 oksYV vkj,e,l fcuk vkdZ ds yxkbZ tk,A
As a routine test, the high voltage, may be carried out
in the form of flash test an ac voltage of 2 000 V rms
being applied for a period of 1 s between the parts
specified in 15.4 without arcing.
18
vkbZ,l@IS 371 : 1999
16 TEMPERATURE RISE
16 rkieku o`f¼
16-1 lhfyax jksT+k dks bl rjg cuk;k o fMtkbu fd;k tk,
fd tc os lkekU; iz;ksx esa yxk,a vkSj dke esa yk,a tk,a rc
muds èkkjk okgd iqtks± dk rkieku vR;fèkd u gksA
16.1 Ceiling roses shall be so designed and constructed
that, when installed and used as in normal use, the
temperature rise of current-carrying parts is not
excessive.
16-1-1 vuqo`fr dks 16-2 vkSj 16-3 esa fn, x, ijh{k.kksa ls
tkapk tk,A
16.1.1 Compliance shall be checked by the tests
described in 16.2 and 16.3.
16-2 oxhZdj.k 8-1 ds }kjk n'kkZ, x, rjhds ds vuqlkj
lhfyax jksT+k dks f{kfrt ds lekukarj lrg tks yxHkx 10
feeh- eksVk vkSj 500 × 500 feeh-2 IykbZoqM ds VqdM+s ftl
ij esV liQsn jksxu fd;k x;k gks ds uhps yxk,aA dksbZ Hkh
t:jh yxkus okyh fMCch ;k ;qfDr fdlh Hkh fo'ks"k <ax ls
lkekU; ifjlaLFkkiu vH;kl esa iz;ksx esa ykbZ tk, vkSj lhfyax
jksT+k dks yxkus okyh lrg ds fcYdqy dsanz esa yxk,aA
16.2 Ceiling roses shall be mounted, in the manner
indicated by the classification of 8.1, on the underside
of a horizontal surface comprising a piece of plywood
approximately 10 mm thick and 500 mm × 500 mm2,
painted mate white. Any necessary mounting box or
device shall be used in a manner typical of normal
installation practice and the ceiling rose shall be
located in the center of the mounting surface.
dsoy yphyh rkjksa ds la;kstu ds fy, VfeZuyksa ds vykok
lkjs VfeZuyksa dks 1-5 feeh-2 piVh tqM+oka rkj tks vkbZ,l 694
ds vuqlkj gks ftlesa ifjiFk ds cpko ds fy, pkyd gks] ls
rkjcanh dh tk,A
All terminals, other than those intended for the
exclusive connection of flexible cords, shall be wired
with 1.5 mm2 flat twin complying with IS 694 with
circuit protective conductor.
VfeZuy tks ypdnkj rkjksa dks tksM+us ds fy, fuèkkZfjr gks
mudh 0-75 feeh-2 xksy tqM+oka ypdnkj rkj] tks vkbZ,l 694
dh lkj.kh 6 ds vuqlkj gks] ls rkjcanh dh tk,A
fuf'pr dh gqbZ dscysa ;k rkjksa dh lhfyax jksT+k ls ckgj dh
yackbZ dscy ds fy, de ls de 1-0 ehVj vkSj rkjksa ds fy,
0-5 ehVj gksA
Terminals intended for the connection of flexible cords
shall be wired with 0.75 mm2 circular twin flexible
cord complying with Table 6 of IS 694.
The length of the specified cables or cords, outside
the ceiling rose, shall be at least 1.0 m for cables and
0.5 m for cords.
fuEufyf[kr ifjiFk la;kstu cuk, tk,a%
The following circuit connections shall be made:
d) vkus okyh lIykbZ % 1-5 feeh-2 dh dscysa_
[k) tkus okyh lIykbZ % 1-5 feeh-2 dh dscysa_
x) fLop la;kstu
% 1-5 feeh-2 dh dscysa (fVIi.kh
ns[ksa)_ vkSj
?k) yksM la;kstu
% 0-75 feeh-2 ypdhyh rkjA
a) incoming supply : 1.5 mm2 cables;
b) outgoing supply : 1.5 mm2 cables;
c) switch connection: 1.5 mm2 cables (see Note);
and
d) load connection : 0.75 mm2 flexible cord.
VfeZuy isapksa dks ftudk lkj.kh 1 esa lkekU; mi;ksx ds fy,
cykèkw.kZ eku fn;k x;k gS] ds vuqlkj dlk tk,A
Terminal screws shall be tightened with the torque
values for normal use given in Table 1.
fVIi.kh µ lhfyax jksT+k ftldk iz;ksx fLop ifjiFk ds la;kstu ds
fy, u gks] en (x) dks NksM+ fn;k tk,A
NOTE — Except that, in a ceiling rose not intended for the
connection of a switching circuit, item (c) is omitted.
16-3 16-2 esa fn, ijh{k.k ds ckn uhps fy[kh nks ijh{k.k
fLFkfr;ka iSnk djus ds fy, yksM dks dscyksa ds lkFk tksMk+ tk,A
16.3 Loads shall then be connected to the cables after
the test of 16.2 to provide two test conditions as
follows:
ijh{k.k 1
Test 1
d) lIykbZ lkslZ ds lkFk tksM+k tk,A
[k) izfrjksfèkr yksM dks fuEufyf[kr vuqlkj tksM+sa%
1) isp
a uqek VfeZuyksa ds fy, 16 ,sfEi;j izfrjksfèkr
yksM ds lkFk tksM+k tk,_
2) cxSj isap ds VfeZuyksa ds fy, 10 ,sfEi;j
izfrjksfèkr yksM ds lkFk tksM+sa_
a) Connect to supply source;
b) Connect to a resistive load as follows:
1) For screw-type terminals connect to a
16 A resistive load;
2) For screwless terminals connect to a 10 A
resistive load;
19
vkbZ,l@IS 371 : 1999
c) Open-circuit (see Note); and
d) Open circuit.
x) [kqyk ifjiFk (fVIi.kh ns[ksa)_ vkSj
?k) [kqyk ifjiFkA
ijh{k.k 2
d) lIykbZ lkslZ ds lkFk tksM+k tk,_
[k) izfrjksfèkr yksM osQ lkFk fuEukuqlkj tksM+sa%
1) isp
a uqek VfeZuyksa ds fy, 10 ,sfEi;j izfrjksfèkr
yksM ds lkFk tksM+k tk,_
2) cxSj isp ds VfeZuyksa ds fy, 4 ,sfEi;j
izfrjksfèkr yksM ds lkFk tksM+sa_
x) can ifjiFk (fVIi.kh ns[kaas)_ vkSj
?k) 6 ,sfEi;j izfrjksèkd yksM ds lkFk tksMs+aA
Test 2
a)
Connect to supply source;
b) Connect to a resistive load as follows:
1) For screw-type terminals connect to a
10 A resistive load;
2) For screwless terminals connect to a 4 A
resistive load;
c) Closed circuit (see Note); and
d) Connect to a 6 A resistive load.
fVIi.kh µ lhfyax jksT+k ftldk iz;ksx fLop ifjiFk ds la;kstu ds
fy, u gks % ijh{k.k 1 vkSj ijh{k.k 2 dh en (x) dks NksM+ fn;k
tk, vkSj tgka ckgj tkus okys vyx VfeZuy u fn, x, gkas] ijh{k.k
1 vkSj ijh{k.k 2 dh en ([k) dks NksM+ fn;k tk,A
NOTE — Except that, in a ceiling rose not intended for the
connection of a switching circuit, item (c) of Test 1 and Test 2
is omitted and where separate outgoing terminals are not
provided item (b) of Test 1 and Test 2 is omitted.
16.4 When separate outgoing supply terminals are not
provided Test 1 is not applicable.
16-4 tc ckgj tkus okyh lIykbZ ds vyx VfeZuy u fn,
x, gksa rc ijh{k.k 1 ykxw ugha gksxkA
fdlh Hkh ijh{k.k esa yksM ij fdlh Hkh èkkjk okgd VfeZuy dk
rkieku 45°ls-a ls vfèkd ugha gksuk pkfg,A ijh{k.k dks rc rd
tkjh j[kk tk, tc rd fLFkjrk ugha gksrh] ,d ?kaVs esa 1°ls-a ls
vfèkd rkieku esa o`f¼ u gksus dh fLFkfr dks fLFkjrk ekuk tk,A
The temperature rise of any current-carrying terminal,
on load, shall not exceed 45°C in either test. The test
shall continue until stability is reached, stability being
taken as not more than 1°C rise within 1 h.
17 MECHANICAL STRENGTH
17 ;ka f =kd lkeF;Z
17-1 lhfyax jksT+k dh ;kaf=kd lkeF;Z bruh gksuh pkfg, fd
laLFkkiu vkSj dke esa vkus okys ruko dks lgu dj ldsaA
17.1 Ceiling roses shall have adequate mechanical
strength to withstand the stresses imposed during
installation and use.
17-1-1 vuqo`fr dks 17-2 esa fn, x, midj.k dk iz;ksx
djds 17-3 esa o.kZu fd, x, ijh{k.kksa }kjk tkapk tk,A
17-2 lhfyax jksTk+ dks vkd`fr 1 esa fn[kk, x, bEiSDV ;a=k ls
ijh{k.k fd;k tkrk gSA
17.1.1 Compliance shall be checked by the tests
described in 17.3 using the apparatus in 17.2.
17.2 Ceiling roses are tested with the impact apparatus
shown in Fig. 1.
nksyd ;a=k esa ,d bLikr dh yVdrh V~;wc gksrh gS tks dsoy
yac :i Iysu esa xfr djrh gSA ,d pksV yxkus okyk rRo
ftldk Hkkj 0-15 fdyksxzke gks vkSj tks V~;wc ds uhps okys
fljs ij iDdh rjg fiQDl fd;k gks vkSj ftldk v{k
yVdko ds v{k ls 1 ehVj dh nwjh ij gksA
The pendulum consists of a steel tube suspended in
such a way that it swings only in a vertical plane. A
striking element of 0.15 kg is rigidly fixed to the lower
end with its axis 1 m from the axis of suspension.
ikyhvekbZM ds cus gq, v¼Z xksy fljs pksV yxkus okys rRo
dk fljk 10 feeh- vèkZO;kl dk v¼Z xksykdkj gksrk gS] ;g
ikyhvekbZM ftldk jkdoSy dM+diu R 100 ;k gkjuche
gks] dk cuk gksrk gS (vkÑfr 2 ns[ksa)A
The striking element has a hemispherical face made of
polyamide having a Rockwell hardens of R 100, or
hornbeam, and a radius of 10 mm (see Fig. 2).
The design of the apparatus is such that a force of 1.9 N
to 2 N is applied to the face of the striking elements to
maintain the pendulum in a horizontal position.
;a=k dk fMtkbZu ,lk gks fd nksyd ;a=k dks lery fLFkfr eas
j[kus ds fy, pkj rRo ds fljs ij 1-9 U;wVu ls 2-0 U;wVu
dk cy yxkuk iM+sA
lhfyax jksTk+ dks 175 feeh-2] 8 feeh- eksVh IykbZoqM dh 'khV
ds dsanz esa yxkdj vkd`fr 3 esa n'kkZbZ xbZ yxkus okyh Vsd ij
Åij vkSj uhps okys fljksa ij yxk;k tk,A
Ceiling roses are mounted in the center of a sheet of
plywood, 8 mm thick and 175 mm2, secured at its top
and bottom edges to a mounting support shown in
Fig. 3.
20
vkbZ,l@IS 371 : 1999
ikboV
lek;ksT;
idM+
pksV yxkus
okyk rRo
uewuk
fxjus dh
mQ¡pkbZ
vkèkkj
fVIi.kh µ bl fp=k dk mís'; fMtkbZu dks fu;af=kr djuk ugha gS] dsoy vk;ke vkSj fof'k"V vis{kkvksa ds fy, gSA
NOTE — This drawing is not intended to govern design except as regards the dimensions and specific requirements shown.
lHkh vk;ke feyhehVjksa esaA
vkd`fr 1 nkSyd la?kV~V ijh{k.k midj.k
All dimensions in millimetres.
FIG. 1 PENDULUM IMPACT TEST APPARATUS
vkd`fr 3 esa fn[kkbZ xbZ yxkus okyh Vsd ftldk otu 10 ± 1
fdyksxzke gks vkSj og /qfj;ksa }kjk dBksj czSdsVksa ij yxh gksA
czSdsV ,d izsQe ij yxh gks tks dBksj nhokj ls fiQDl gksA
dBksj pkSdh dk fMtkbu ,slk gks fd%
The mounting support shown (see Fig. 3) having a mass
of 10 ± 1 kg is mounted on a rigid bracket by means of
pivots. The bracket is mounted on a frame which is
fixed to a solid wall. The design of the rigid mounting
is such that:
d) lhfyax jksT+k dks bl rjg yxk;k tk lds fd pksV
dk fcanw èkwjh ds v{k ls xqtjrs gq, yac :i Iysu
esa gks_
[k) lhfyax jksT+k f{kfrt ds lekukUrj Iysu esa fgykbZ tk
lds vkSj IykbZoqM dh lrg ds yEcor v{k ds
fxnZ ?kqek;k tk lds_ vkSj
x) IykbZoqM dks yac :i v{k o fxnZ ?kqek;k tk ldsA
a)
the ceiling rose can be so placed that the point
of impact lies in the vertical plane through
the axis of the pivot;
b) the ceiling rose can be moved horizontally
and turned about an axis perpendicular to the
surface of the plywood; and
c) the plywood can be turned about a vertical axis.
17.3 Surface type ceiling roses shall be mounted on
the plywood.
17-3 lrg izdkj ds lhfyax jksT+k IykbZoqM ij yxk, tk,aA
izkoèkku ;k v¼Z&dVko izdkj ds lhfyax jksT+k vkSj muds
fMCcs] vxj gksa] mudks gkMZoqM ds l[r ydM+h ds VqdM+s esa
j[kdj IykbZoqM dh 'khV ij fiQDl fd;k tk,A tks ydM+h
VqdM+s ds fy, bLrseky gks muds js'kksa dh fn'kk pksV dh fn'kk
ds lacaèk esa yEc :i gksA lkekU; mi;ksx dh fLFkfr ds
Flush or semi-recessed type ceiling roses and their
boxes, if any, shall be placed in a block of hardwood
which is itself fixed to the sheet of plywood. In the
wood used for the block the direction of the wood fibres
shall be perpendicular to the direction of impact. To
21
22
Materials
1. Polyamide or hornbean
2, 3, 4 and 5: Steel
FIG. 2 CONSTRUCTIONAL DETAILS OF STRIKING ELEMENT
All dimensions in millimetres.
vkd`fr 2 pksV yxkus okys rRo dk lajpukRed foLrkj
lHkh vk;ke feyhehVjksa esaA
NOTE — The drawing is not intended to govern design except as regards the dimensions and specific requirements shown.
fVIi.kh µ bl fp=k dk mís'; fMtkbZu dks fu;af=kr djuk ugha gS] dsoy vk;ke vkSj fof'k"V vis{kkvksa ds fy, gSA
lkefxz;k¡
1- iksyhekbM ;k gksuZche
2] 3] 4 vkSj 5 % LVhy
vkbZ,l@IS 371 : 1999
vkbZ,l@IS 371 : 1999
ikboV
IykbZoqM dh 'khV
ikboV
U;wure
fVIi.kh µ bl fp=k dk mís'; fMtkbZu dks fu;af=kr djuk ugha gS] ;g dsoy vk;ke vkSj fof'k"V vis{kkvksa ds fy, gSA
NOTE — This drawing is not intended to govern design except as regards the dimensions and specific requirements shown.
lHkh vk;ke feyhehVjksa esaA
vkÑfr 3 ijh{k.k uewus osQ fy;s yxkus okys vkèkkj dk lajpukRed foLrkj
All dimensions in millimetres.
FIG. 3 CONSTRUCTIONAL DETAILS OF MOUNTING SUPPORT FOR TEST SPECIMENS
simulate the condition of normal use the rear of the
plate is flush with the surface of the block. The front
edge of the box shall be between 2.5 mm and 5 mm
behind the face of the block.
vuqdwy cukus ds fy, IysV dk fiNyk fgLlk VqdM+s dh
lrg ij leku gksA fMCcs dk vxyk fgLlk VqdM+s dh lrg
ds 2-5 ls 5 feeh- ds chp ihNs gksA lHkh ijh{k.kksa esa pksV
rRo VqdM+s dh lrg osQ 2-5 feeh- ls 5 feeh- osQ chp ihNs
gksA
For all tests the striking element shall be between
2.5 mm and 5 mm behind the face of the block.
lHkh ijh{k.kksa ds fy, pksV rRo VqdM+s dh lrg ds 2-5 feehls 5 feeh- ds chp ihNs gksA
For all tests the striking element shall fall from a height
of 150 mm measured vertically between the point of
impact on the ceiling rose and the face of the striking
element at the point of release.
lHkh ijh{k.kksa esa pksV rRo 150 feeh- dh ÅapkbZ ls fxjuk
pkfg,] ;g ÅapkbZ lhfyax jksT+k ij pksV ds fcUnw vkSj pksV rRo
dh lrg] ;gka ls mls NksM+k tkrk gS] yac :i esa ekik tk,A
lhfyax jksT+k dh igqap okyh ckgjh lrg ij] ukd&vkÅV dks
NksM+dj fHkUu&2 fcUnqvksa ij dqy 10 pksVsa yxkbZ tk,aA
A total of 10 blows shall be applied to points distributed
over the accessible external surface of the ceiling rose,
excluding knock-outs.
23
vkbZ,l@IS 371 : 1999
During the test, cracks may appear and small pieces
may become detached, but provided the ceiling rose
cover can be removed and replaced and still complies
with 11, 15.5 and 15.6.
ijh{k.k ds nkSjku] njkjsa vk ldrh gSa vkSj NksVs VqdM+s VwV ldrs
gSa] ij ;fn lhfyax jksT+k dk <Ddu [kksyk vkSj yxk;k tk lds
rks 11
11] 15-5 vkSj 15-6 ds vuqlkj gksA
18 Å"ek izfrjksèku
18 RESISTANCE TO HEAT
18-1 lhfyax jksT+k Å"ek jksèkh gksus pkfg,aA
18.1 Ceiling roses shall be resistant to heat.
18-1-1 vuqo`fr dks 18-2
18-2] 18-3 vkSj 18-4 esa mfYyf[kr
ijh{k.kksa ls tk¡pk tk,A
18.1.1 Compliance shall be checked by the tests
described in 18.2, 18.3 and 18.4.
18-2 lhfyax jksT+k dks xeZ djus okys d{k esa ,d ?kaVs dh
vo/h ds fy, 100 ± 2°lsa- ds rki ij j[kk tk,A
18.2 The ceiling roses shall be kept for 1 h in a heating
cabinet at a temperature of 100 ± 2°C.
bl ijh{k.k ds nkSjku lhfyax jksT+k esa dksbZ Hkh ifjorZu u gks]
vkSj ftl ls vkxs fy, tkus okys dk;Z eas ckèkk vk,A lhy
djus okys ;kSfxd ds fdlh Hkh cgko dks NksM+ fn;k tk,A
During the test, the ceiling roses shall not undergo
any change impairing their further use. Any flow of
sealing compound shall be disregarded.
After the test, the ceiling rose shall comply with 11.
ijh{k.k ds ckn lhfyax jksT+k [kaM 11 ds vuqlkj lgh gksaA
18-3 jksèku lkexzh ds Hkkxksa tks èkkjk ys tkus okys Hkkxksa dks
jksdus ds fy, t:jh gksa mu ij vkd`fr 4 esa fn[kk,a midj.k
}kjk ckWy nkc ijh{k.k fd;k tk,A ijhf{kr fd, tkus okys Hkkx
dh lrg dks {kSfrt fLFkfr esa j[k dj 5 feeh- O;kl ds bLikr
dh ckWy ds lkFk lrg ij 20 U;wVu dk ncko fn;k tk,A
18.3 Parts of insulating material necessary to retain
current carrying parts shall be subjected to a ball
pressure test by means of the apparatus shown in Fig. 4.
The surface of the part to be tested shall be placed in a
horizontal position and a steel ball of 5 mm diameter
shall be pressed against this surface with a force of
20 N.
tc ;g ijh{k.k Lo;a lhfyax jksT+k ds Åij djuk laHko gks ;g
ijh{k.k ,d leku lkexzh ds uewus ftldh eksVkbZ 2 feeh- ls
de u gks] ij fd;k tk,A
When it is possible to carry out the test on the ceiling
rose itself the tests shall be carried out on a specimen
of the same material not less than 2 mm thick.
;g ijh{k.k rkiu d{k esa 125 ± 2°lsa- ds rki ij j[kdj
fd;k tk,A
The test shall be made in a heating cabinet at a
temperature of 125 ± 2°C.
Vsd dks rkiu d{k esa i;kZIr le; rd j[kk tk, rkfd og
ijh{k.k 'kq: gksus ls igys fLFkj ijhf{kr rkieku rd igq¡p
ldsA
The underside of the supporting means shall be placed
within the heating cabinet for a sufficient time to
ensure they have attained the stabilized testing
temperature before the test commences.
xksykdkj
ijh{k.k uewuk
fVIi.kh µ bl fp=k dk mís'; fMtkbZu dks fu;af=kr djuk ugha gS] ;g dsoy vk;ke vkSj fof'k"V vis{kkvksa ds fy, gSA
NOTE — This drawing is not intended to govern design except as regards the dimensions and specific requirements shown.
lHkh vk;ke feyhehVjksa esaA
vkd`fr 4 ckWy nkc ijh{k.k midj.k
All dimensions in millimetres.
FIG . 4 BALL PRESSURE TEST A PPARATUS
24
vkbZ,l@IS 371 : 1999
os Hkkx ftu ij ijh{k.k fd;k tkuk gks] dks ijh{k.k yksM
Mkyus ls 10 feuV igys rkiu d{k esa j[kk tk,A
The part to be tested shall be placed in heating cabinet
for a period of 10 min before the test load is applied.
,d ?kaVs ds ckn uewus ls cy dks gVk;k tk, vkSj de ls de
10 lSdaM ikuh] ftldk rkieku dejs ds rkieku ds cjkcj
gks] esa fuefTtr djds BaMk fd;k tk,A ckWy ls cus gq, nkc
dk O;kl ekik tk, vkSj ;g 2 feeh- ls T;knk u gksA
After 1 h, the ball shall be removed from the specimen
which shall then be cooled down by immersion for at
least 10 s in water at approximately room temperature.
The diameter of the impression caused by the ball shall
be measured and shall not exceed 2 mm.
18-4 jksfèkr lkexzh ds Hkkx t:jh ugha fd og èkkjk okgd
Hkkxksa dks fLFkfr esa j[krs gksa] cs'kd og muds lkFk laidZ esa
gksa] mu ij cky nkc ijh{k.k 18-3 ds vuqlkj fd;k tk, ij
ijh{k.k 75 ± 2°lsa- rkieku ij gksA
18.4 Parts of insulating material not necessary to retain
current carrying parts in position, even though they are
in contact with them, shall be subjected to a ball
pressure test as described in 18.3 but the test shall be
made at a temperature at 75 ± 2°C.
1 9 v l k è k k j . k Å " e kk]] v kkx
x vkSj vuqorZu
izfrjksèku
19 RESISTANCE TO ABNORMAL HEAT, FIRE
AND TRACKING
19-1 milkèku] vlkèkkj.k mQ"ek] vkx vkSj vuqorZu ls
vesèk gksA
19.1 Accessories shall be proof against abnormal heat,
fire and tracking.
19-1-1 vuqo`fr dks 19-2 vkSj 19-3 esa fn, x, ijh{k.kksa }kjk
tk¡pk tk,A
19.1.1 Compliance shall be checked by the tests
described in 19.2 and 19.3.
;g ijh{k.k fljkfed lkexzh vkSj èkkrq ds cus Hkkxksa ij u
fd, tk,aA
The tests shall not be made on parts of ceramic material
or metal.
19-2 nhfIr&rkj ijh{k.k
19.2 Glow-Wire Test
;g ijh{k.k vkbZ,l 11000 (Hkkx 2@[kaM 1) ds vuqlkj
fuEufyf[kr fLFkfr;ksa esa fd, tk,a%
The test is performed according to IS 11000 (Part 2/
Sec 1) under the following conditions:
a)
for parts of insulating material necessary to
retain current-carrying parts and parts of the
earthing circuit, in position, by the test made
at a temperature of 850°C; and
b) for parts of insulating material not necessary
to retain current-carrying parts and parts of
the earthing circuit in position, even they are
in contact with them, by the test made at a
temperature of 850°C.
d) jksèku lkexzh ds os Hkkx tks èkkjk okgd Hkkxksa dks
jksdus ds fy, t:jh gkas vkSj vFkZ ifjiFk ds Hkkxksa
ij mlh fLFkfr esa ;g ijh{k.k 850°lsa- rkieku ij
fd;k tk,a_ vkSj
[k) jksèku lkexzh ds os Hkkx tks èkkjk okgd Hkkxksa ds
jksdus ds fy, t:jh u gksa vkSj vFkZ ifjiFk okys
Hkkx viuh fLFkfr esa gksa] cs'kd og muds laidZ esa
gks] mu ij ;g ijh{k.k 850°lsa- ij fd;k tk,A
If the tests specified have to be made at more than one
place on the same ceiling rose, care shall be taken to
ensure that any deterioration caused by previous tests
does not affect the result of the test to be made.
;fn fuf'pr ijh{k.k mlh lhfyax jksT+k ij ,d ls T;knk LFkkuksa
ij djus gkas rks ;g fuf'pr fd;k tk, fd igys fd, x,
ijh{k.k ls gqbZ [kjkch dk vlj fd, tk jgs ijh{k.k ds urhts
ij u gksA
Small parts, such as washers, are not subjected to
tests.
NksVs Hkkxksa] tSlk fd okW'kjksa] ij ijh{k.k u fd, tk,aA dk¡fpr
lkexzh ds Hkkxksa ij ijh{k.k u fd, tk,aA
The tests are not made on parts of ceramic material.
fVIif.k;ka
1 nhfIr&rkj ijh{k.k ;g fuf'pr djus ds fy, fd;k tkrk gS fd
fctyh }kjk xeZ dh xbZ ijh{k.k rkj crkbZ xbZ 'krksZa ds vuqlkj jksfèkr
lkexzh ds Hkkxksa dks vkx u yxk lds ;k ;g fuf'pr djus ds fy,
fd ftl jksfèkr lkexzh ds Hkkx dks crkbZ xbZ 'krksZa ds vuqlkj xeZ
ijh{k.k rkj ls vkx yxkbZ tk,] tks yiVksa ls vkx vkSj rUrq i=k ls
n¡kis IykbZoqM dh r[rh rd tyrs gq, Hkkx ;k NksVs rRo ijhf{kr gks
jgs Hkkx ls fxjdj vkx iQSyus ds fcuk lhfer le; ds fy, gh ty
ldsA
NOTES
1 The glow-wire test is applied to ensure that electrically heated
test wire under defined test condition does not cause ignition
of insulating parts or to ensure that a part of insulating material,
which might be ignited by the heated test wire under defined
conditions, has a limited time to burn without spreading fire by
flame or burning parts or droplets from the tested part falling down
on to the pinewood board covered with tissue paper.
25
vkbZ,l@IS 371 : 1999
If possible, the specimen should be a complete ceiling rose.
;fn laHko gks rks uewuk laiw.kZ lhfyax jksT+k gksuk pkfg,A
2 ;fn] ijh{k.k laiw.kZ lhfyax jksT+k ij djuk laHko u gks rks ijh{k.k
ds fy, blls ,d mfpr Hkkx dkV fy;k tk,A ijh{k.k ,d uewus ij
fd;k tk,A 'kadk dh fLFkfr esa nks vyx uewuksa ij ijh{k.k nksgjk,aA
ijh{k.k ls igys uewuksa dks 24 ?kaVs dh vofèk ds fy, LVSaMMZ ifjos'k
okrkoj.k fLFkfr esa j[kk tk,A
ijh{k.k] nhfIr rkj ,d gh ckj yxkdj fd;k tk,A
ijh{k.k nkSjku] uewus dks blds iz;ksx ds lcls T;knk izfrdwy fLFkfr
esa yxk;k tk,A (ijhf{kr lrg ds yac :i fLFkfr ds lkFk) nhfIr
rkj ds fljs dks uewus dh fuf'pr lrg ij ;g è;ku esa j[krs gq,
ml txg ij yxk;k tk, fd blds iz;ksx dh fLFkfr;ka ftuesa xeZ
;k tyrk gqvk iqtkZ lhfyax jksT+k ds laidZ esa vk,A
nhfIr rkj ds vuqiz;ksx dh vofèk ds nkSjku vkSj vuqiz;ksx dks [kRe
gksus ls 30 lSdaM dh vofèk ds nkSjku uewus vkSj blds bnZ&fxnZ ds
Hkkx] uewus ds uhps dh ijr ds lfgr Hkkxksa dk fujh{k.k djsaA
og le; tc uewuk tyuk 'kq: djrk gS vkSj@;k og le; tc
vuqiz;ksx dh vofèk ds ckn ;k nkSjku yiVsa cq>rh gSa] dks ekik tk,
vkSj fjdkMZ fd;k tk,A
lhfyax jksT+k nhfIr rkj ijh{k.k ds ikl gqbZ ekuh tk,xh ;fn%
µ yiVsa vkSj fcuk VwVs Toyu n`f"Vxkspj u gksA
µ lhfyax jksT+k ls nhfIr rkj gVkus ls 30 lSdaM ds chp yiVsa vkSj
Toyu cq> tk,A
fyiVs gq, rarq i=k ij Toyu ;k r[rh ij nXèk ds fu'kku ugha gksus
pkfg,A
3 ijh{k.k vkbZ,l 302&1 ds ifjf'k"V ts esa fn, nwljs rjhds ls Hkh
fd;k tk ldrk gSA ij bl ekud ds izdkf'kr gksus dh frfFk ls 3
lky ckn] ;s rjhdk ykxw ughaA
4 nhfIr rkj ijh{k.k midj.k vkSj rkikUrj ;qXe ds lkFk nhfIr rkj
dk fo'ks"k fp=k vkd`fr 5 vkSj 6 esa fn[kk;k x;k gSA
2 If the test cannot be made on a complete ceiling rose a suitable
part may be cut from it for the purpose of the test.
The test is made on one specimen. In case of doubt, the test shall
be repeated on two further specimens.
The specimens shall be stored for 24 h at standard ambient
atmospheric condition before the test.
The test is made applying the glow-wire once.
The specimen shall be positioned during the test in the most
unfavourable position of its intended use (with the surface tested
in a vertical position). The tip of the glow-wire shall be applied
to the specified surface of the specimen taking into account
the conditions of the intended use under which a heated or
glowing element may come into contact with the switch.
During the application time of the glow-wire and during a period
of 30 s from the end of the application time, the sample and the
surrounding parts, including the layer under the sample, shall
be observed.
The time when the ignition of the sample occurs and/or the
time when the flames extinguish during or after the application
time shall be measured and recorded.
The switch is regarded as having passed the glow-wire test if:
— there is no visible flame and sustained glowing.
— flames and glowing at the switch extinguish within 30 s
after the removal of the glow-wire.
There shall be no ignition of the wrapping tissue or scorching
of the board.
3 The test may be carried out by the alternative method given
in Annex J of IS 302-1. However the method shall not be
applicable after 3 years from the date of publication of this
standard.
4 A typical diagram of glow-wire test apparatus and glow-wire
with thermocouple has been shown in Fig. 5 and Fig. 6.
19-3 vuqorZu ijh{k.k
19.3 Tracking Test
ijhf{kr djus okys Hkkx dh piVh lrg] tks ;fn gks lds rks
de ls de 15 feeh- × 15 feeh- vkSj 3 feeh- eksVh gks]
{kSfrt ds lekukUrj j[kh tk,A vkd`fr 7 esa fn[kk, x, rki
okys IySfVue ds nks bySDVªksM uewus dh lrg ij j[ks tk,a]
tSlk fd vkd`fr esa fn[kk;k x;k gS rkfd buds xksy fljs dh
iwjh yackbZ uewus ds lkFk lEidZ esa gksA izR;sd bySDVªksM
1 ± 0-05 U;wVu dk cy lrg ij MkysaA
A flat surface of the part to be tested, if possible at
least 15 mm × 15 mm and 3 mm thick, is placed in a
horizontal position. Two electrodes of platinum with
dimensions shown in Fig. 7, are placed on surface of
the specimen as shown in figure, so that the rounded
edges are in contact with the specimen over the whole
length. The force exerted on the surface by each
electrode is 1 ± 0.05 N.
The electrodes are connected to a 50 Hz supply of
substantially sinusoidal waveform with a no-load
voltage of 175 V. The current is adjusted by means of
a variable resistor to 1 ± 0.1A with cos φ = 0.95 ±
0.05. An over current relay which will trip when 0.5
A or more has persisted for 2 s is included in the circuit.
bySDVªksM dks 50 gVZt~ dh vkiwfrZ rRoiw.kZ T;koØh; rjaxiQkeZ
175 oksYV fcuk yksM ds oksYVrk osQ lkFk tksM+k tk,A èkkjk dks
ifjorZu'khy izfrjksèkd ls ,sl lek;ksftr fd;k tk, fd
cos φ = 0-95 ± 0-05 ds lkFk 1 ± 0-1 ,sfEi;j fey ldsA
ifjiFk esa ,d vfr èkkjk fjys gksuh pkfg, tks 0-5 ,sfEi;j ;k
T;knk èkkjk 2 lSdaM+ rd cgus ij fVªi gks tk,A
The surface of the specimen is wetted by allowing drops
of a solution of ammonium chloride in distilled water
to fall centrally between the electrodes. The solution
shall have a resistivity of 395 ± 5 φ. cm any ambient
temperature between 15°C to 35°C corresponding to a
concentration of 0.1 percent. The drops shall have a
volume of 20 ± 3 mm3 and shall fall from a height of 35
uewus dh lrg dks veksfu;e dyksjkbM ds vklqr ty esa
?kksy dh cwankssa ls xhyk fd;k tk, tks bySDVªkWM ds chp dsanz
ij fxjsaA ?kksy ftldh lkanZzrk 0-1 izfr'kr ds vuqlkj gS] dh
izfrjksfèkrk ijhos'k ds 15°lsa- ls 35°lsa- ds eè; ds rki ij
395 ± 5 φ lseh- gks] cwanksa dk ?kuiQy 20 ± 3 feeh-3 gks vkSj
26
vkbZ,l@IS 371 : 1999
lwpd%
Key: 1. Glow-wire, brazed to 3
2. Thermocouple
3. Brass Studs (37 percent Cu)
1- 3 ds lkFk ihry dk Vakdk yxh gqbZ nhfIr&rkj
2- rkikUrj ;qXe
3- ihry ds LVM (37 çfr'kr rkack)
lHkh vk;ke feyhehVjksa esaA
vkd`fr 5 rkikUrj ;qXe lfgr nhfIr&rkj
All dimensions in millimetres.
FIG. 5 GLOW-WIRE WITH THERMOCOUPLE
og 30 ± 5 feeh- dh mQ¡pkbZ ls fxjsA ,d cawn vksj vxyh
cwan dk le; varjky 30 ± 5 lSfdaM+ gksxkA 50 cwansa fxjus ls
igys bySDVªkWM ds chp esa nEd foltZu ;k Hkatu u gksA
± 5 mm. The time interval between one drop and the
next shall be 30 ± 5 s. No flashover or breakdown
between the electrodes shall occur before 50 drops have
fallen.
uewus ij rhu LFkkuksa ij ijh{k.k fd;k tk,A 'kadk dh fLFkfr
esa ;fn t:jh gks rks u, uewus ij ijh{k.k fd;k tk,A
The test shall be made at three places on the specimen.
In case of doubt the test is repeated, if necessary on a
new specimen.
fVIi.kh;ka
1 ;g t:jh gS fd gj ijh{k.k 'kq: djus ls igys ;g ;dhu cuk;k
tk, fd bySDDVªkWM lkiQ gks] cukoV Bhd gks vkSj mudks lgh txg
ij yxk;k tk,A
2 ;g ijh{k.k mRikndksa ds fn'kk funsZ'k ds fy, gS rkfd og dPph
lkexzh dk lgh pquko dj ldsA
NOTES
1 It is essential that care is taken to ensure that the electrodes are
clean, correctly shaped and correctly positioned before each test
is started.
2 This test is for the proper selection of the raw material as a
guidance for the manufacturers.
20 SCREWS, CURRENT-CARRYING PARTS
AND CONNECTIONS
20 is a p ] èkkjk&okgd Hkkx vkS j tks M +
20-1 isap okys tksM+ksa dks fctyh vkSj nwljs lkekU; iz;ksx esa
vkus okys ;kaf=kd rukoksa dks lgus dh lkeF;Z gksA isap tks
fctyh laidZ ds fy, ncko cukrs gSa mudh pwM+h èkkrq esa
p<+uh pkfg,A isap ,slh èkkrq ds ugha gksus pkfg,a tks ueZ gks
vkSj tks ean fo:i.k gks ldsA
20.1 Screwed connection, electrical and otherwise,
shall withstand the mechanical stresses occurring in
normal use. Screw transmitting electrical contact
pressure shall screw into metal. Screw shall not be of
metal which is soft and liable to creep.
27
vkbZ,l@IS 371 : 1999
lwpd%
1- uewus ds fy, Vsd
2- Vªkyh
3- [khapus okyh Mksjh
4- vkèkkj IysV
5- Hkkj
6- lek;ksT; jksd
Key :
78910-
Tokyk dh ÅapkbZ ukius dk iSekuk
1. Support for sample 7.
8.
2. Carriage
csaèk dh xgjkbZ ds fy, iSekuk
9.
3. Pulling string
rkikUrj ;qXe lfgr nhfIr&rkj
10.
4. Base plate
vkèkkj IysV esa <ys gq, ;k tyrs
5. Weight
gq, rRoksa ds fudkl ds fy, [kkyh
6. Adjustable stop
txg
lHkh vk;ke feyhehVjksa esaA
Scale for flame height
Scale for depth of penetration
Glow-wire with thermocouple
Opening in base plate to pass
molten or glowing particles
vkd`fr 6 nhfIr&rkj ijh{k.k midj.k
All dimensions in millimetres.
FIG. 6 GLOW-WIRE TEST APPARATUS
isap jksfèkr lkexzh ds u cus gkas ;fn mudh txg ij èkkrq ds
isap yxkus ds ckn bl [kaM dh vuqo`fr ij vlj gksA
Screw shall not be of insulating material if their
replacement by a metal screw would affect compliance
of this clause.
fctyh ds tksM+ dk fMtkbu ,slk gks fd laidZ nkc phuh ds
bykok nwljh jksfèkr lkexzh }kjk u igqaprk gks] ;fn jksfèkr
lkexzh dh laHkkfor fldqM+u dks {kfr iwfrZ ds fy, èkkrq Hkkxksa
eas mfpr ypd u gksA
Electrical connection shall be so designed that contact
pressure is not transmitted through insulating material
other than ceramic, unless there is sufficient resiliency
in the metal parts to compensate for any possible
shrinkage of the insulating material.
20-1-1 vuqo`fr dks fujh{k.k }kjk tkapk tk, vkSj isapksa vkSj
f<cfj;ka tks laLFkkiu ;k mi;ksx ds nkSjku dlus ds earO; ds
fy, gksa] dks fuEufyf[kr ijh{k.k }kjk tkapk tk,A
20.1.1 Compliance shall be checked by inspection and,
for screws and nuts which are intended to be tightened
during installation, or use, by the following test.
isap dks dlk vkSj <hyk fd;k tk,%
The screw shall be tightened and loosened:
a)
d) fo|qr jksfèkr lkexzh esa Hkhrjh pwfM+;ksa esa dk;Z djus
okys isapksa ds fy, 10 ckj] ;s isap gj ckj iw.kZ :i
ls gVk, tk,a vkSj fiQj ls yxk fn, tk,a_ vkSj
28
10 times for screws in engagement with a thread
of insulating material, the screw being
completely removed and replaced each time; and
vkbZ,l@IS 371 : 1999
b) five times for nuts and other screws.
[k) èkkrq ds Hkhrjh pwfM+;ksa esa dk;Z djus okys isapksa ds
fy, 5 ckjA
NOTES
fVIif.k;ka
1 VfeZuyksa dh tkap ds fy, vko';drk,a 13 esa nh xbZ gSA
ijh{k.k mi;qDr ijh{k.k ispdl }kjk lkj.kh 1 esa nh xbZ cykèkw.kZ
yxkdj fd;k tk,A
bl ijh{k.k ds nkSjku] isapnkj la;kstuksa }kjk fy, tkus okys dk;Z esa
dksbZ Hkh {kfr ;k VwV&iQwV u gksA
2 ;g t:jh gS fd ijh{k.k ispdl ds iQyd dk vkdkj ijhf{kr
fd, tkus okys isp ds 'kh"kZ ds fy, mi;qDr gks] vkSj isp dks >Vdksa
ls ugha dlk tk,A
1 The requirements for the verification of terminals are given
in 13.
20-2 èkkjk&okgd Hkkxksa ds latk;uksa ds fy, pwM+h cukus okys
isap iz;ksx esa u yk,aA
20.2 Thread-forming screws shall not be used for the
connection of current-carrying parts.
fVIi.kh µ pwM+h cukus okys isapksa dk iz;ksx vFkZ lkrR; ds fy,
fd;k tk ldrk gSA ;|fi ;g lkekU; mi;ksx esa bl la;kstu dks
fgykus dh vko';drk u gks vkSj gj ,d la;kstu ds fy, de ls
de nks isap iz;ksx esa yk,aA
èkkjk okgd la;kstu ds fy, isap tks vyx&vyx Hkkxksa esa ;kaf=kd
la;kstu cukrs gks]a mudks <hyk gksus ls jksdus ds fy, jksd yxkbZ tk,
;fn bl la;kstu esa èkkjk cgrh gksA dhyd tks fd èkkjk okgd
la;kstuksa ds fy, fd;k x;k gks muds fy, <hyk gksus ls jksd yxkbZ
tk, ;fn ;s la;kstu lkekU; mi;ksx esa ejksM+ ls izHkkfor gksus okyk gksA
NOTE — Thread forming screws may be used to provide earthing
continuity, provided that it is not necessary to distrub the
connection in normal use and at least two screws are used for
each connection.
The test shall be made by means of a suitable test screwdriver,
applying a torque as given in Table 1.
During the test no damage impairing the further use of the screwed
connection shall occur.
2 It is essential that the shape of the blade of the test screwdriver
suits the head of the screw being tested, and that the screw is not
tightened in jerks.
Screws which make a mechanical connection between different
parts of the accessory shall be locked against loosening, if the
connection carries current. Rivets used for current-carrying
connection shall be locked against loosening, if these connections
are subject to torsion in normal use.
d) bySDVªksM
[k) bySDVªksM O;oLFkk
a) Electrode
b) Electrode Arrangement
Key :
1. Platinum electrode
2. Brass extension
3. Support
4. Tip of dropping device
5. Specimen
lwpd%
1- IysfVue bySDVªksM
2- ihry dh oèkZu
3- Vsd
4- rq"V osQ fxjkus okyh ;qfDr dk fljk
5- uewuk
lHkh vk;ke feyhehVjksa esaA
vkd`fr 7 vuqorZu ijh{k.k osQ fy;s bySDVªksM dh O;oLFkk vkSj vk;ke
All dimensions in millimetres.
FIG. 7 A RRANGEMENT AND DIMENSIONS OF THE E LECTRODES FOR THE TRACKING T EST
29
vkbZ,l@IS 371 : 1999
20.2.1 Compliance shall be checked by inspection and
by manual test to check tightness.
20-2-1 vuqo`fr dks fujh{k.k }kjk vkSj dlko ds nLrh
ijh{k.k }kjk tkapk tk,A
NOTES
fVif.k;ka
1 NYyk vkSj bl tSls midj.k larks"k tud jksd iSnk dj ldrs gksaA
2 dhydksa ds fy, u xksykdkj fi.Myh ;k ,d mfpr nkark dkiQh
gksxkA
1 Spring washers and the like may provide satisfactory locking.
2 For rivets a non-circular shank or an appropriate notch may
be sufficient.
20.3 Current-carrying parts shall be of brass, copper,
phosphor bronze or other metal at least equivalent with
regard to its conductivity and resistance to corrosion.
20-3 èkkjk okgd Hkkx ihry] rkack iQkliQksj ;qDr dkalk ;k
nwljk èkkrq ftldh lapkfydrk vkSj la{kkj.k jksfèkdrk de ls
de buds rqY; gksA
NOTE — This requirement does not apply to screws, nuts,
washers, clamping plates and similar parts of terminals nor to
parts used for earth continuity purposes.
fVIi.kh µ ;g vko';drk isap] f<cjh] NYys] idM+us okyh IysV
vkSj VfeZuy ds bl tSls Hkkxksa ij ykxw ugha gS] u gh mu Hkkxksa ds
fy, tks vFkZ lkrR; ds fy, bLrseky gksA
20.3.1 Compliance shall be checked by inspection and
by the relevant tests of 16 and 22.
20-3-1 vuqo`fr dks fujh{k.k }kjk 16 vkSj 22 ds lacafèkr
ijh{k.kksa }kjk tkapk tk,A
21 CREEPAGE DISTANCE AND CLEARANCES
21 folihZ nw j h vkS j fuckZ è krk
Creepage distance and clearances shall be not less than
the values shown in Table 3.
folihZ nwjh vkSj fuckZèkrk dk eku lkj.kh 3 esa fn[kk, x,
ekuksa ls de u gksA
21.1 Compliance shall be checked by inspection and
measurement.
21-1 vuqo`fr dks fujh{k.k vkSj ekiu ds }kjk tkapk tk,A
Table 3 Creepage Distances and Clearances
(Clause 21; and Annex A)
lkj.kh 3 folihZ nwjh vkSj fuckZèkrk
([kaM 21_ vkSj vuqcaèk d)
Øeka d
(1)
i)
ii)
iii)
fopkjkèkhu iFk
fuckèkZ r k folihZ nwjh
feehfeeh(2)
(3)
(4)
fofHkUu èkzqork okys 'kfDriw.kZ Hkkxksa ds chp
2-0
2-5
'kfDriw.kZ Hkkxksa vkSj nwljs èkkrq ds Hkkxksa ds 2-5
5
chp
µ
'kfDriw.kZ èkkrq ds Hkkxksa vkSj vkoj.k ;k 3-0
lrg ftl ds Åij milkèku dks yxk;k
x;k gS_ ugha rks Nsn ftlesa ,sls 'kfDriw.kZ
Hkkx gksa de ls de 1 feeh- eksVh fly
jfgr jksèku ls Hkjs tk,a
Sl
No.
(1)
Path Under Consideration
i)
Between live parts of different
polarity
Between live parts and other metal
part
Between live metal parts and the
enclosure or the surface on which the
accessory is mounted, unless the holes
containing such live parts are filled in
with a non-hygroscopic insulation of
at least 1 mm thickness
ii)
iii)
(2)
Clearance Creepage
mm
mm
(3)
(4)
2.0
2.5
2.5
2.5
3.0
—
22 RESISTANCE TO EXCESSIVE RESIDUAL
STRESS AND TO RUSTING
22 vfèkd 'ks"k ruko vkSj tax ds izfr
jks f èkrk
22.1 Contacts and other functional parts of copper or
copper alloy shall be resistant to failure in use due to
brittleness.
22-1 rkacs ;k rkacs dh èkkrqvksa ds feJ.k ls cus lEidZ vkSj
nwljs dke djus okys Hkkx [kqjnjsiu dkj.k iz;ksx esa foiQyrk
ds fo|qr jksèkh gksus pkfg,aA
22-1-1 og rkacs ;k rkacs dh èkkrqvksa ds feJ.k ls cus Hkkx
ftuesa 80 çfr'kr ls de rkack u gks] dks lgh ekuk tk,A
22.1.1 Parts made from copper or copper alloy
containing not less than 80 percent copper shall be
assumed to comply.
rkacs dh èkkrqvksa ds feJ.k ls cus Hkkx ftuesa 80 çfr'kr ls
de rkack gks] mudks fuEufyf[kr ijh{k.kksa ls tkapk tk,A
For copper alloys containing less than 80 percent
copper, compliance shall be checked by the following
test.
Hkkx dh fpdukgV [kkjs ;k vkxZfud ?kksy ls nwj dh tk,]
fiQj bls ejD;wjl ukbZVªsV ds tyh; ?kksy ftlesa izfr fyVj 10
xzke Hg2(NO3)2 vkSj 10 fefyyhVj HNO3 (ftldh visf{kr
The part is degreased in a suitable alkaline decreasing
solution or organic solvent, then immersed in an
aqueous solution of mercurous nitrate containing 10 g
30
vkbZ,l@IS 371 : 1999
of Hg2 (NO3)2 and 10 ml of HNO3 (relative density
1.42) per litre of solution for 30 min at any ambient
temperature between 15°C to 35°C.
?k.krk 1-42 gks) Mkyk gks] mlesa 30 feuV ds fy, 15°ls-a vkSj
35°lsa- ij fuefTtr djssaA
fVIi.kh µ psrkouh nh tkrh gS fd ;g ?kksy tgjhys gksus dh otg
ls buds iz;ksx ds nkSjku t:jh lkoèkkfu;ka cjrh tk,aA
bl mipkj ds ckn uewuksa dks cgrs ikuh esa èkks;k tk,] vfèkd ikjk
lkiQ fd;k tk,] vkSj uewuksa dks vka[kksa ls ns[k dj tk¡psaA dksbZ njkj
u gks tks lkekU; rFkk fcuk vfèkd vfr';ksfDr ds Bhd dh gqbZ n`f"V
ls ns[kh tk ldsA
NOTE — Attention is drawn to the fact that due precautions should
be taken when using these liquids as they are toxic.
After the treatment the sample is washed in running water, any
excess mercury wiped off and the sample is immediately visually
examined. There shall be no cracks visible with normal or
corrected vision without additional magnification.
22.2 Ferrous part shall be adequately protected against
rusting.
22-2 yksgs ds Hkkxksa dk tax ds izfr vPNh rjg cpko gksA
22-2-1 vuqo`fr dks fuEufyf[kr ijh{k.kksa ls tkapk tk,A
22.2.1 Compliance shall be checked by the following
test.
lHkh ijhf{kr Hkkxksa dks VªkbDyksjksbFksu ;k bl tSls xzht mtkjus
okys ,tsaV esa 10 feuV ds fy, fuefTtr djds xzht mrkj nsa
rc iqtksZ dks 15°lsa- vkSj 35°lsa- ds rkieku ds chp 10 feuV
ds fy, 10 çfr'kr veksfu;e DyksjkbM ds ikuh esa fuefTtr
djsaA
All grease is removed from the parts to be tested, by
immersion in trichlorethane or an equivalent degreasing
agent for 10 min. The parts are then immersed for 10
min in a 10 percent solution of ammonium chloride in
water at any ambient temperature between 15°C to 35°C.
Hkkxksa dks fcuk lq[kk, ijarq cwanksa dks vPNh rjg fgykdj
NqVkus ij 10 feuV ds fy, vknzZrk d{k ftldk rkieku
15°lsa- vkSj 35°lsa- ds chp gks vkSj mlesa ueh okyh gok gks]
esa j[ksaA rkiu d{k esa 100 ± 5°lsa- rki ij 10 feuV rd
lq[kku ds ckn mudh lrg ij tax ds fu'kku utj ugha vkus
pkfg,aA
Without drying, but after shaking off any drops, the
parts are placed for 10 min in a box containing air
saturated with moisture at any ambient temperature
between 15°C to 35°C. After the parts have been dried
for 10 min in a heating cabinet at a temperature of 100
± 5°C their surfaces shall show no signs of rust.
fVIif.k;k¡
1 rh[ks Hkkxksa ij tax dh ygjsa vkSj ihysiu dh ijr] ftls jxM+us
ls mrkjk tk, mudks NksM+ fn;k tk,A
2 NksVs dqaMfyuh dekuh vFkok ,sls gh vkSj iqtsZ ftu ds Åij [kjksapsa
vk ldrh gSa vkSj muds Åij xzhl dh ijr tax ds fo#¼ lqj{kk ds
fy, dkiQh gSA ,sls Hkkxksa ij vxj xzhl ds ckjs esa 'kadk gks rks ijh{k.k
igyh xzhl dh ijr dks mrkjs fcuk fd;k tk,A
NOTES
1 Traces of rust on sharp edges and any yellowish film
removable by rubbing should be ignored.
2 For small helical spring and the like, and for parts exposed to
abrasion, a layer of grease may provide sufficient protection
against rusting. Such parts are only subjected to the test if there
is doubt about the effectiveness of the grease film and the test
should then be made without previous removal of the grease.
23 ijh{k.k
23 TESTS
23-1 Vkbi ijh{k.k
23.1 Type Tests
lhfyax jkst ds rhu uewuksa ij fuEufyf[kr Vkbi ijh{k.k fd,
tk,a tgka uewus rjthg rkSj ij fufeZr mRiknu ykWV ls
;kn`fPNd :i ls fy, tk,aA
The following shall be carried out as type tests on nine
samples of ceiling roses, drawn preferably at random
from a regular production lot:
Øekad
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
Sl
No.
Vkbi ijh{k.k
[kaM ns[ksa
lwpukadu
9
vk;ke
10
'kfDriw.kZ iqtksZa dh vfHkxE;rk
11
vFkZ ds fy, izcaèk
12
VfeZuy
13
fuekZ.k
14
xhykiu vkSj ueh izfrjksfèkrk] jksèku 15
izfrjksfèkrk vkSj fo|qr lkeF;Z
rkieku esa o`f¼
16
i)
ii)
iii)
iv)
v)
vi)
vii)
Type Test
Markings
Dimensions
Accessibility of live parts
Provision of earthing
Terminals
Construction
Resistance to moisture and humidity,
insulation resistance and electric strength
viii) Temperature rise
31
See
Clause
9
10
11
12
13
14
15
16
vkbZ,l@IS 371 : 1999
Øekad
ix)
x)
xi)
xii)
xiii)
xiv)
Type Test
Sl
No.
Vkbi ijh{k.k
[kaM ns[ksa
;kaf=kd lkeF;Z
17
Å"ek izfrjksèku
18
vfu;fer Å"ek] vkx vkSj vuqorZu 19
izfrjksfèkrk
isap] fo|qr èkkjk&okgd iqtsZ vkSj
20
;kstd
folihZ nwjh vkSj fuckZèkrk
21
vfèkd 'ks"k ruko vkSj tax dh
22
izfrjksfèkrk
See
Clause
ix) Mechanical strength
x) Resistance to heat
xi) Resistance to abnormal heat fire and
tracking
xii) Screws, current-carrying parts and
connectors
xiii) Creepage distances and clearances
xiv) Resistance to excessive residual stresses
and to rusting
17
18
19
20
21
22
23-1-1 uewuksa dh la[;k ukS gks] ftu ij 6-2 esa fn, x,
ijh{k.k fd, tk,aA
23.1.1 The number of samples shall be nine and
subjected to test specified in 6.2.
23-1-2 Lohdk;Zrk ds fy, ekinaM
23.1.2 Criteria of Acceptance
Lohdk;Zrk ds fy, ekinaM 6-3 ds vuqlkj gksA
The criteria of acceptance shall be as per 6.3.
23-2 Lohdk;Zrk ijh{k.k
23.2 Acceptance Tests
fuEufyf[kr ijh{k.k Lohdk;Zrk ijh{k.k ekus tk,a%
The following shall constitute acceptance tests:
Øekad
Lohdk;Zrk ijh{k.k
i)
ii)
iii)
iv)
v)
vi)
lwpukadu
vk;ke
'kfDriw.kZ iqtks± dh vfHkxE;rk
vFkZ dsd fy, izcaèk
VfeZuy
xhykiu vkSj ueh izfrjksfèkrk] jksèku
izfrjksfèkrk vkSj fo|qr lkeF;Z
vii) rkieku esa o`f¼
viii) ;kaf=kd lkeF;Z
ix) isp] fo|qr èkkjk&okgd iqtsZ vkSj ;kstd
[kaM ns[ks
Sl
No.
9
10
11
12
13
15
i)
ii)
iii)
iv)
v)
vi)
Acceptance Test
Marking
Dimensions
Accessibility of live parts
Provision of earthing
Terminals
Resistance to moisture and humidity
insulation resistance and electric
strength
vii) Temperature rise
viii) Mechanical strength
ix) Screws, current-carrying parts and
connections
16
17
20
See
Clause
9
10
11
12
13
15
16
17
20
23-2-1 uewus ysus dh dk;Zfofèk ds fy, vkbZ,l 2500
(Hkkx 1) dks fopkjk tk ldrk gSA
23.2.1 For sampling plan IS 2500 (Part 1) may be
referred to.
23-3 us e h ijh{k.k
23.3 Routine Tests
fuEufyf[kr ijh{k.k useh ijh{k.k ekus tk,a%
The following shall constitute routine tests:
i)
i) Flash test (see 15.7)
ii) Marking (see 9)
ÝyS'k ijh{k.k (15-7
15-7 ns[ksa)
lwpukadu (99 ns[ksa)
ii)
fVIi.kh µ lwpukadu dks fujh{k.k }kjk tkapk tk,A
NOTE — Marking shall be checked by inspection.
32
vkbZ,l@IS 371 : 1999
vuqcaèk d
([kaM 21] vkSj lkj.kh 3)
folihZ nwjh vkSj fuckZèkrk dk eki
ANNEX A
(Clause 21, and Table 3)
MEASUREMENT OF CREEPAGE DISTANCES AND CLEARANCES
A-l The methods of measuring creepage distances and
clearances to be used in interpreting the requirements
of 21 are indicated in Cases 1 to 10 of this Annex. These
cases do not differentiate between gaps and grooves or
between types of insulation.
d&1 folihZ nwjh vkSj fuckZèkrk dks ekius ds fy, [kaM 21
esa nh xbZ t:jrksa dks le>kus ds fy, tks bl ifjf'k"V dh
fLFkfr;ka 1 ls 10 esa nh xbZ gSa] dk iz;ksx fd;k tk,A bu
fLFkfr;ksa esa varjky vkSj [kkapksa ds chp ;k jksèku ds fdLeksa ds
chp voyksdu ugha djrsA
d&2 fuEufyf[kr dYiuk,a dh tk ldrh gS%
d) [kkapsa lekukUrj vfHklkjh vkSj vilkjh fn'kk esa gks
ldrh gSaA
[k) dksbZ Hkh [kkap ftldh vilkjh fn'kk dh U;wure
pkSMk+ bZ 0-25 feeh- ls vfèkd u gks] xgjkbZ 1-5 feehuhps dh pkSM+kbZ 1 feeh- ds cjkcj ;k vfèkd gks]
bldks ok;q varjky ekuk tk, (fLFkfr 8 ns[ksa)A
x) dksbZ Hkh dksuk ftl esa 80 fMxzh ls de dks.k Hkh
'kkfey gks dks lcls T;knk çfrowQy fLFkfr esa yxs
1 feeh- pkSM+kbZ (èkwyjfgr fLFkfr gsrq 0-25 feeh-)
osQ jksèku fyad osQ lkFk ikVk gqvk ekuk tk,
(fLFkfr 3 ns[ksa)A
?k) tgka [kkap ds Åij okys fgLls ds chp 1 feeh ;k
vfèkd dh nwjh gks (èkwyjfgr fLFkfr ds fy, 0-25
feeh-) ok;q {ks=k ds chp folihZ nwjh ugha jguh
pkfg, (fLFkfr 2 ns[ksa)A
Ä) ;fn ok;q varjky tSlk fd en ([k) esa mQij fn;k
x;k gS_ 0-25 feeh- ls vfèkd gks rks folihZ iFk
ugha gSA
p) Hkkx tks ,d nwljs ds lacèa k ls fgyus okys gksa mudh
folihZ nwjh vkSj fuckZèkrk dks rc ekik tk, tc ;g
Hkkx lcls T;knk izfrdwy fLFkj fLFkfr esa gksAa
N) vfHkdfyr folihZ nwjh dHkh Hkh ekih gqbZ fuckZèkrk
nwjh ls de ugha gksxhA
t) dksbZ ok;q varjky ftldh pkSM+kbZ 1 feeh- (èkwyjfgr
fLFkfr ds fy, 0-25 feeh-) ls de gks] mldks
dqy fuckZèkrk nwjh ds vfHkdyu esa u ekuk tk,A
A-2 The following assumptions are made:
a)
A groove may have parallel, converging or
diverging sides.
b) Any groove having diverging sides, a
minimum width exceeding 0.25 mm, a depth
exceeding 1.5 mm and width at a bottom equal
to, or greater than, 1 mm, is regarded as an air
gap (see Case 8).
c)
Any corner including an angle less than 80°
is assumed to be bridged with an insulating
link of 1 mm width (0.25 mm for dirt-free
situations) moved into the most unfavourable
position (see Case 3).
d) Where the distances across the top of a groove
is 1 mm (0.25 mm for dirt-free situations) or
more, no creepage distance exists across the
air space (see Case 2)
e)
A creepage path is assumed not to exist if there
is an air gap, as defined in item (b) above,
exceeding 0.25 mm.
f)
Creepage distances and clearances measured
between parts moving relative to each other
are measured when these parts are in their most
unfavourable stationary positions.
g) A computed creepage distance is never less
than a measured clearance.
h) Any air gap less than 1 mm wide (0.25 mm
for dirt-free situations) is ignored in computing
the total clearance.
33
vkbZ,l@IS 371 : 1999
'krZ %
tk¡p vèkhu iFk esa lekukraj ;k vfHklkjh lkbZM okyh fdlh Hkh
xgjkbZ dh [kk¡p] ftldh pkSM+kbZ 1 feeh- ls de gks] 'kkfey gSaA
fu;e % folihZ nwjh vkSj fuckZèkrk dks [kk¡p ds chp lhèkk ukik tkrk gS
tSlk fd fn[kk;k x;k gSA
Condition:
Rule:
'krZ % tk¡p vèkhu iFk esa mHkkj 'kkfey gSA
fu;e % fuckZèkrk mHkkj ds Åij ls lhèkk y?kqre gok esa iFk gSA folihZ
iFk mHkkj dh :ijs[kk ds lkFk&lkFk pyrk gSA
Condition: Path under consideration includes a rib.
Rule:
Clearance is the shortest direct air path over the top of
the rib. Creepage path follows the contour of the rib.
Path under consideration includes a parallel or convergingside groove of any depth with width less than 1 mm.
Creepage distance and clearance are measured directly
across the groove as shown.
fLFkfr 4
CASE 4
fLFkfr 1
CASE 1
'krZ %
tk¡p vèkhu iFk esa lkekUrj lkbZM okyh fdlh Hkh xgjkbZ okyh
vkSj 1 feeh- ;k blls T;knk pkSM+kbZ okyh [kk¡p 'kkfey gSA
fu;e % fuckZèkrk ^n`f"V dh js[kk* dh nwjh gSA folihZ iFk [kk¡p dh
:ijs[kk ds lkFk&lkFk pyrk gSA
'krZ %
tk¡p vèkhu iFk fcuk lhesVa fd;k gqvk tksM+ ftldh nksuksa lkbZM
esa 1 feeh- ls de (0-25 feeh-) pkSMk+ bZ dh [kk¡p gks] 'kkfey gSA
fu;e % fuckZèkrk vkSj folihZ iFk ^n`f"V dh js[kk* dh nwjh gS tSlk fd
fn[kk;k x;k gSA
Condition: Path under consideration includes a parallel-sided groove
of any depth, and equal to or more than 1 mm wide.
Rule:
Clearance is a ‘line of sight’ distance. Creepage path
follows the contour of the groove.
Condition: Path under consideration includes an uncemented joint
with grooves of less than 1 mm (0.25 mm) width on
either side.
Rule:
Creepage and clearance path is the ‘line of sight’
distance shown.
fLFkfr 2
CASE 2
fLFkfr 5
CASE 5
tk¡p vèkhu iFk esa V-vkdkj dh [kk¡p ftlesa van:uh dks.k
80° ls de gks vkSj pkSM+kbZ 1 feeh- ls T;knk gks 'kkfey gSA
fu;e % fuckZèkrk ^n`f"V dh js[kk* dh nwjh gSA folihZ iFk&[kk¡p dh
:ijs[kk ds lkFk&lkFk gS] ij [kk¡p dh uhps okyh lrg dks 1
feeh- dh dM+h dk ^y?kw ifjiFk* cuk nsrk gS (1@4 feeh- èkwy
jfgr fLFkfr;ksa ds fy,A)
'krZ %
'krZ %
tk¡p vèkhu iFk fcuk lhesaV fd;k gqvk tksM+ ftldh nksuksa lkbZM
esa 1 feeh- ;k blls T;knk pkSM+h [kk¡ps gks] 'kfey gSaA
fu;e % fuckZèkrk ^n`f"V dh js[kk* dh nwjh ds cjkcj gSA folihZ iFk [kk¡pksa
dh :ijs[kk ds lkFk&lkFk pyrk gSA
Condition: Path under consideration includes a V-shaped groove with
internal angle of less than 80° and with a width greater
than 1 mm.
Rule:
Clearance is ‘line of sight’ distance. Creepage path follows
the contour of the groove but ‘short-circuits’ the bottom of
the groove by 1 mm (¼ mm for dirt-free situations) link.
Condition: Path under consideration includes an uncemented joint
with grooves equal to or more than 1 mm wide each
side.
Rule:
Creepage is the ‘line of sight’ distance. Creepage path
follows the contour of the grooves.
fLFkfr 3
CASE 6
fLFkfr 6
CASE 3
34
vkbZ,l@IS 371 : 1999
'krZ %
tk¡p vèkhu iFk fcuk lhesaV fd;k gqvk tksM+ ftldh ,d lkbMZ
esa 1 feeh- ls de dh [kk¡p gks vkSj nwljh lkbZM 1 feeh- ;k
blls T;knk pkSM+h [kk¡p gks] 'kkfey gSA
fu;e % fuckZèkrk vkSj folihZ iFk tSlk fd fn[kk;k x;k gSA
Condition: Path under consideration includes an uncemented joint
with a groove on one side of less than 1 mm wide, and the
groove on the other of equal to or more than 1 mm wide.
Rule:
'krZ %
tk¡p vèkhu iFk vilkjh lkbZM [kkyh [kk¡p] ftldh xgjkbZ
1 12 feeh- ;k blls T;knk gks vkSj pkSM+kbZ blds lcls rax Hkkx
esa 1@4 feeh- ls T;knk gks vkSj bldh uhps okyh lrg ij
1 feeh- ;k blls T;knk gks] 'kkfey gSA
fu;e % fuckZèkrk ^n`f"V dh js[kk* dh nwjh gSA folihZ iFk [kk¡p dh
:ijs[kk ds lkFk&lkFk pyrk gSA
fVIi.kh µ fLFkfr 3 van#uh dks.kksa ij Hkh ykxw gS ;fn og 80° ls
de gSaA
Clearance and creepage paths are as shown.
fLFkfr 7
CASE 7
Condition: Path under consideration includes a diverging-sided groove
equal to or greater than 1½ mm deep and greater than ¼
mm wide at the narrowest part and equal to or greater than
1 mm at the bottom.
Rule:
Clearance is ‘line of sight’ distance. Creepage path follows
the contour of the groove.
NOTE — Case 3 applies as well to the internal corners if they are
less than 80°.
fLFkfr 8
CASE 8
dVko dh nhokj vkSj iasp ds 'kh"kZ ds chp varjky bruk rax gks tks fglkc esa yk;k tk ldsA
Gap between head of screw and wall of recess too narrow to be taken into account.
fLFkfr 9
CASE 9
35
vkbZ,l@IS 371 : 1999
dVko dh nhokj vkSj isap ds 'kh"kZ ds chp varjky bruk pkSM+k gks tks fglkc eas yk;k tk ldsA
Gap between head of screw and wall of recess wide enough to be taken into account.
fLFkfr 10
CASE 10
fuoZpu esa fookn dh fLFkfr esa bl ekud dk vaxzsT+kh ikB gh ekU; gksxkA
In case of dispute in interpretation, English version of this standard shall be authentic.
36
(nwljs doj ls tkjh)
tc rkjacnh ds fy, ,Y;wfefu;e ds pkyd okyh dscy iz;ksx djuk gks rks dqN lkoèkkfu;k¡ gksuh t:jh gSa ¹ns[ksa vkbZ,l 732 % 1989
^fctyh dh rkjsa laLFkkiu dh jhfr lafgrk (rhljk iqujh{k.k)*ºbl ekud dks rS;kj djus esa fczVsu dh ekud laLFkk }kjk izLrqr fd, x, ch,l 67 % 1987 ^lhfyax jksfT+kTk+ dh fof'kf"V* dh
enn yh xbZ gSA
;g fuf'pr djus ds fy, fd bl ekud esa nh xbZ fdlh vis{kk fo'ks"k dk ikyu fd;k x;k gS ;k ugha] rks ijh{k.k ;k fo'ys"k.k
osQ ifj.kke dks n'kkZus okys voyksdu ;k x.kuk }kjk izkIr vafre eku dks vkbZ,l 2 % 1960 ^la[;kRed ekuksa ds iw.kkZadu lacaèkh
fu;e (iqujhf{kr)* ds vuqlkj iw.kk±fdr dj fn;k tk,A iw.kkZafdar eku esa j[ks x, lkFkZd LFkkuksa dh la[;k mruh gh gks ftruh
bl ekud esa fufnZ"V eku dh gSA
(Continued from second cover)
While using aluminium conductor cables for wiring, certain precautions have to be taken [see IS 732 : 1989 ‘Code
of practice for electrical wiring installations (third revision)’].
While preparing this standard considerable assistance has been derived from BS 67 : 1987 ‘Specification for
ceiling roses’ issued by the British Standards Institution.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2 : 1960 ‘Rules
for rounding off numerical values (revised)’. The number of significant places retained in the rounded off value
should be the same as that of the specified value in this standard.
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote
harmonious development of the activities of standardization, marking and quality certification of goods
and attending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any form
without the prior permission in writing of BIS. This does not preclude the free use, in the course of
implementing the standard, of necessary details, such as symbols and sizes, type or grade designations.
Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of
‘BIS Catalogue’ and ‘Standards : Monthly Additions’.
This Indian Standard has been developed from Doc No.: ETD 14 (4033).
Amendments Issued Since Publication
Amend No.
Date of Issue
Text Affected
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