SOUTHWESTERN
BELL TELEPHONE
SECTION 462-260-201SW
Issue B, December, 1987
PRACTICE
SWBT Standard
*
DROP AND BLOCK ~?IRING AT AERIAL CABLE TERMINALS
PAGE
CONTENTS
——
GENERAL
2.
SAFETY
3.
STRAND-MOUNTED
.......................................................
4
...............................................................
4
..............................................................
7
TERMINALS
61-TYPE TERMINALS
.....................................................
8
................................................................
10
104- OR 105-TYPE TERMINALS
N-TYPE TERMINAL
POLE-MOUNTED
.........................................................
12
...............................................................
12
TERMINALS
N-TYPE TERMINALS
........................................
13
.........................................................
22
POLE MOUNTED CROSS-CONNECTING
TERMINALS
TERMINALS
!5.
WALL-MOUNTED
6.
BINDING POST CAPS AND INSULATORS
1.
3
.........................................................................
49-TYPE TERM1NAL
4.
1.
........................................................................
1.
...............................................
28
PLACING BINDING POST CAPS ......................................................
29
PLACING BINDING POST INSULATORS
31
................................................
GENERAL
l.Oi
This section covers drop and block wire runs at aerial cable terminals.
Its
purpose is to provide a guide for the neat and orderly placement of wire rings
for the support of drop and block wire.
PROPRIETARY
Not for use or disclosure outside Southwestern Be] 1
Telephone Company except under written agreement.
Page 1
462-260-201SW
1.02
This section is reissued to add procedures
binding posts and the use of gel-filled
1.03
for the proper method of cleaning
or water proof caps, if applicable.
The B drive tie (Fig. 1) is intended for holding cable or wire on wood surfaces.
The B drive tie is a l-piece black-plastic
flathead nail protruding
tie with a number four galvanized
Installation is by driving
through a tab at one end.
the nail into a wood surface or a plastic anchor.
The B drive tie will hold
wire or cable up to 1-1/8 inches in diameter.
#4 NAIL
/
Fig. 1 - B Drive Tie
1.04
The Drive Ring
surfaces.
(Fig. 2) is intended for holding drop wire on wood or concrete
steel and it consists of a horse
The drive ring is made of galvanized
shoe section equipped with a nail.
Installation
is made by 3riving the nail
portion into a wood surface or a D drive anchor.
DANGER :
Due to the possibility
of injury, DO NOT PLACE 3rive rings in the
area from ground level to a height of six (6) feet.
use either
bridle rings or B drive ties to complete the wire runs on pole or
building applications.
Fig. 2 - Drive Ring
Page 2
462-260-201sw
1.05
Whenever
the B drive tie is mentioned,
it is also intended that the drive ring
may also be used, except where it presents a safety hazard as outlined
in
paragraph ‘1.04.
1.06
When local requirements
indicate the necessity
for using guard arms, refer to
Section 462-300-200.
1.07
Information
covering the various cable terminals referred to in this practice
may be found in the following sections as needed.
TITLE
SECTION
462-030-100
Drop, Block, and Cross-Connect
Wiring-Insulated
Wire
462-300-200
Drop and Block Wiring Pole, Strand, and Tree Attachments
Climbing Space
462-400-211
Drop and Block Wiring, Pole-to-Building
and Pole-to-Pole
Runs
620-216-013
1.08
Clearances
on Jointly Used Poles.
At each visit to the terminal location, perform the following:
- Fingertighten
the nuts on all unused binding posts to keep all contact areas
as clean as possible.
- Brush the faceplate with a water tool brush to remove any dirt that may have
accumulated.
DANGER :
When cutting the ends of wire terminated on binding posts, wear eye
protection
and place the free hand over the binding post before
cutting the wires.
- Trim frayed ends of wires which might cause leakaqe to adjacent wires or
binding posts.
1.09
No more than two conductors
additional bridging
2.
shall be bridged on each binding post.
is necessary, wire terminals
Where
should be used.
SAFETY
2.01
Safety, quality, and quantity
(in that order) are three very important
to consider in the performar,ce of any telephone
factors
job.
Page 3
462-260-201SW
2.02
All employees engaged in working on poles should be familiar with the following
practices:
TITLE
SECTION
188A Test Set
081-705-102
Precautions
620-131-010
(Stop Lite) - Description
and Use
To Be Taken Before Climbing Poles or Working
From Strand- or Pole- Supported Equipment
Buried Service Wire Terminations.
629-720-200
3.
STRAND-MOUNTED
3.01
TERMINALS
Run drop wires to the terminal from the adjacent pole
they distribute
from a cable extension
(Fig. 2), except where
arm or from a span clamp.
from a span clamp should be run directly
A drop wire
from the span clamp to the terminal
when the span clamp is adjacent to the terminal.
3.02
Route the drop or block wire through the three hangers below the terminal,
around the hanger at the far end, and below the terminal to the proper wire
entrance holes of the assigned binding posts.
3.03
3.04
Cut wire to the proper length for terminating.
Remove the required amount of insulation
from the wire to terminate on the
binding post.
3.05
Using long-nose pliers or other suitable tool, break through the wire entrance
hole adjacent to or below the proper pair of binding posts.
3.06
Insert the wire through the wire entrance hole and terminate
post so the end of the insulation
it on the binding
is about 1/8 inch from the washers.
49-TYPE TERMINAL
3.07
Refer to Fig. 3, 4, and 5 for typical arrangements
49-type terminals on aerial cable.
access 49-type terminals to eight
Page 4
of drop wires terminated
Limit the number of drop wires in ready
(8).
in
462-260-201SW
3.08
When placing new connections,
the wire should be run through all the hangers
below the terminal to provide enough slack to enable any wire to reach any pair
~larning:
of binding posts in the event of changes in cable pair assignments.
Wire should be loosely placed to avoid sharp bends at the B ties which may cause
damage to the wire insulation.
—
DROP TO STATION
49.TYPE
TERMINA1
I
\
DROP TO
SPAN CLAMP
DROP ;0
SPAN CLAMP
III
HANGERS
NOTE. To be placed at the same level as termmal hangers
Fig. 3 - Running Drop Wire to 49-Type Terminal at Pole
—
Page 5
I
462-260-201SW
u~
‘
LOCATE B DRIVE TIE OR DRIVE
RINGS SO wIRE RUN TO
TERMINAL WILL BE IN LINE WITH
WIRING HANGARS
Fig. 4 - Running Drop Mires to 49-Type Terminal From Guard Arm
Page 6
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.
462-260-201sW
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—
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IN
5
B DRIVE TIES OR DRIVE RINGS
Fig. 5 - Running Drop Wires to 49-Type Terminal From Cable Extension Arm
61-TYPE TERMINALS
3.09
Refer to Fig. 6 for a typical arrangement
of drop wires at a 61-type terminal.
Page 7
462-260-201SW
rl
—
TO STATION
/
TO STATION
B ORPJE TIE OR DRIVE RINGS
8 IN.
TO NEXT POLE ~
OR SPAN CLAMP
B DRIVE TIE OR
OR DRIVE RINGS
TO NEXT POLE
OR SPAN CLAMP
LOCATE B DRIVE TIE OR ORIVE
RING SO WIRE RUN TO TERMINAL
—
wlLL BE IN LINE WITH TERMINAL
WIRING RINGS
Fig. 6 - Running Drop Wires to 61-Type Terminal
104- OR 105-TYPE TERMINALS
3.10
Refer to Fig. 7, 8, and 9 for typical arrangements
of drop wires at 104- or
105-type cable terminals on aerial cable.
I
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NOTE: To&placWatthesame
level asterm,nal
hangers.
Fig. 7 - Running Drop Wires to 104-105-Type Terminal at Pole
Page 8
.
462-260-201SW
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LOCATE B DRIVE TIE OR ORIVE
RING SO WIRE RUN TO TERMINAL
WILL BE IN LINE WITH TERMINAL
WIRING RINGS
1-!
Fig. 8 - Running Drop Wires to 104 or 105-Type Terminal From Guard Arm
Page 9
462-260-201SVi
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B DRIVE TIES OR DRIVE RINGS
%-,:?’
1
:
Fig. 9 - Running Drop Wires to 104- or 105-Type Cable Terminal
From Cable Extension Arm
N-TYPE TERMINAL
3.11
Refer to Fiq. 10, 11, and 12 for typical arrangements
terminals.
Note that the arrangements
strsnd-mounted
Page 10
cable terminals.
of drop wires at N-type
of wires are similar at all
462-260 -201SW
SPAN TO
I
m
~
~
SPAN TO
BUILDING
-
DO NOT PULL
WIRES TIGHTLY
AROUND RING
i,
LOCATE B DRIVE TIE OR’DRiVE
RING SO WIRE RUN TO TERMINAL
LOCATE DRIVE
HOOK APPROX 31N.
BELOW BOTTOM OF TERMINAL
HOUSING
WILL BE IN LINE WITH TERMINAL
RINGS
FRONT VIEW
REAR VIEW
Fig. 10 - Running Drop Wire to N-Type Cable Terminal From Pole
m
LOCATE B DRIVE TIE OR
DRIVE RING SO WIRES WILL
BE IN LINE WITH TERMINAL
RUN WIRES
BEHIND TERMINAL
AND THROUGH
DO NOT PULL
WIRES TIGHTLY
AR~UND
WIRING RINGS
WIRING RINGS
WIRING RING
Fig. 11 - Running Drop Wire to N-Type Cable Terminal From Guard Arm
Fig. 12 - Running Drop Wire to N-Type Cable Terminal
From Cable Extension Arm
Page 11
462-260-201SW
4.
POLE-MOUNTED
4.01
TERMINALS
All vertical drop and block wire runs on poles should be secured by B drive ties
or drive rings and should be spaced in a straight line, approximately
apart.
24 inches
This line of B drive ties should be about 45 degrees around the pole
from the face or side of the pole on which the terminal is mounted.
4.02
Wires should be routed through the drive tie and then to the terminal entrance
hole.
4.03
Cut the wire to the proper length for terminating.
4.04
Remove the required amount of insulation
from the wire to terminate on the
binding post.
4.05
Insert the wire through the wire entrance hole and terminate
posts so the end of the insulation
it on the binding
is about l/8-inch from the washers on the
binding post.
‘2 ‘“A ‘‘ ‘n”“’n’=Y--=-””oT””+“
RUN WIRES
a..
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-,.-
3+
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~\
LOCATE B DRIVE TIE OR
DRIVE RING SO WIRES WILL
BE IN LINE WITH TERMINAL
BEHIND TERMINAL
AND THROUGH
DO NOT PULL
WIRES TIGHTLY
AR~UND
WIRING RINGS
WIRING RINGS
WIRING RING
Fig. 11 - Running Drop Wire to N-Type Cable Terminal From Guard Arm
Fig. 12 - Running Drop Wire to N-Type Cable Terminal
From Cable Extension Arm
Page 11
462-260-201SW
4.
POLE-MOUNTED
4.01
TERMINALS
All vertical drop and block wire runs on poles should be secured by B drive ties
or drive rings and should be spaced in a straight line, approximately
apart.
24 inches
This line of B drive ties should be about 45 degrees around the pole
from the face or side of the pole on which the terminal is mounted.
4.02
Wires should be routed through the drive tie and then to the terminal entrance
hole.
4.03
Cut the wire to the proper length for terminating.
4.04
Remove the required amount of insulation
from the wire to terminate on the
binding post.
4.05
Insert the wire through the wire entrance hole and terminate
posts so the end of the insulation
it on the binding
is about l/8-inch from the washers on the
binding post.
N-TYPE TERMINALS
4.06
Refer to Fig. 13 and 14 for typical arrangements
terminals which are mounted on poles.
Page 12
of drop wires at N-type
I
462-260-201SW
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TERMINAL STUB
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1.
POSITION OF ORIVE TIES
FOR WIRE RUNS ON
P RIGHT SIDE OF POLE
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USE B DRIVE TIE
OR ORIVE RINGS
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N-TYPE TERMINAL
,25 PAIR SIZE
N.TYPE T
100R 16
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RUN FOR WIRES
TERMINATING ? ON
RIGHT SIOE OF
TERMINAL
RUN
FOR WIRES
TERMINATING
ON LEFT SIDE
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ALIGN B DRIVE TIES
~ OR ORIVE RINGS WITH
SIDES OF TERMINAL
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RUN WIRE CONNECTIONS
THROUGH TWO DRIVE TIES
WHEN TOO SHORT FOR
THREE DRIVE TIES OR DRIVE
B DRIVE TIES OR
DRIVE RINGS WITH SIDES
OF TERMINAL
RINGS
12 IN
~
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PLACE WIRES SLACK
TO AVOID SHARP
BENDS AT ORIVE TIES
Fig. 13 - Running Drop Wire to 10
L
RUN WIRE
CONNECTIONS THROUGH TWO
B DRIVE TIES WHEN
TOO SHORT FOR
THREE BORIVE TIES
\
PLACE WIRE SLACK
TO AVOIO SHARP
BENDS
Fig. 14 - Running Drop Wire to 25 Pair
or 16 Pair N-Type Cable
N-Type Cable Terminal Mounted
Terminal Mounted on Pole
on Pole
POLE-MOUNTED
4.07
TO OPEN TERMINAL
PULL OUT COVER
BY THE BOTTOM LIP
AND LOWER
F
\
CROSS-CONNECTING
TERMINALS
Install drop wire in accordance with the following procedure:
(1) Place B drive ties on the pole as shown in Fig. 15
Page 13
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462-260-201SW
INGS
USE TH
ENTERI
OF TER
DRIVE
LEFT
DROP WIRE
;
L,
3 IN,
-
‘.
:.ill
“
B
DROP WIRE
1!
CENTER DRIVE TIES OR ORIVE
RINGS BELOW WIRE ENTRANCE
HOLES
ill~
Fig. 15 - Running Drop Wire at Cross-Connecting
(2) Where a drop wire is to be terminated
Terminal
on the right side of the terminal
chamber, run the wire down the right side of the pole behind the terminal,
through the two drive ties below the terminal, and into the wire entrance
holes on the bottom left of the terminal box.
Where the drop wire is to be
terminated. on the left side of the terminal chamber, run the wire down the
left side fif the pole behind the terminal, through the two drive ties below
the terminal, and into the wire entrance holes cm the bottom right of the
terminal hex.
(3) Install cross-connecting
wire between the feeder pair binding posts and a
vacant drop wire binding post.
Fig. 16 and 17.
Page 14
Then terminate the drop wire as shown in
462-260-201SW
DISTRIBUTING
RINGS
-CROSS
CO NNEC :TING
WIRES
CROSS
CONNE
WIRE
CON N E(’”1‘ING
F3-OCK
DROP
ANC
BLOCK
WIRE
ENTERING
BOTTOh4
OF CABINET
4
Fig. 16 - Terminating
=%/
DROP
AND
ENTRANCE
BLOCK
WIRE
HOLES
Drop Wire - 101-Type Cable Terminal
Page 15
462-260-201SW
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-
WIRING
HOLES
CROSSCONNECTING
WIRE
DROP ANO
BLOCK
WIRE
ENTRANCE
HOLES
,
++
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BINDING
POSTS
OROP
Fig. 17 - Terminating
4.08
DROP WIRE
drop wire are not provided on the superseded BD
Drop wires are installed in these terminals as follows:
(1) Proceed as in paragraph
Page 16
u
Drop Wire - B-Type Cable Terminals
Binding posts for terminating
and BE terminals.
FOR
WIRES
4.07(1) and (2).
462-260-201sW
(2) Run the drop wire upward in the wiring channel behind the faceplate
extension on the side of the chamber opposite
is to be terminated,
then over the top wiring shelf or the two rings located
at the top of the housing, and downward
routing of wires entering
illustrated
the binding posts on which it
in Fig. 18.
to the proper wiring hole.
the terminal on the left and right sides is
Terminate drop wire between washers on the binding
posts of the feeder pair unless two wires are already terminated
posts.
The
Where one of these two wires is a cross-connecting
the second drop wire on the distribution
on these
wire, terminate
cable pair, but not more than two
wires should be bridged on the binding posts of the distribution
cable pair.
Where more than two wires are to be bridged to the ‘same cable pair, install
a 400-2000A wire terminal on the pole outside the terminal, and bridge the
new drop and one of the existing drops in the wire terminal.
(3) Insert the wire ir]to the proper wiring hole, cut the wire to the proper
length, and terminate on the binding post with the tracer conductor
right.
to the
Place the wire under the lower washer unless the space is occupied
by an existing wire; in which case, place the second wire between washers.
Page 17
462-260-201SW
DROP WIRE
[.,
—
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DROP
WIRE
DROP
WIRE
M’DROpw’RE
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WIRE
SHELF
-DROP
WIRE
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B DRIVE
TIES OR
DRIVE RINGS
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NOTE:
CROSS CONNECTING WIRES
OMITTED FOR CLARI TY,
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Fig. 18 - Terminating
Page 18
DRIVE
RINGS
Drop Wire - Superseded BD and BE Cable Terminals
462-260-201SW
4.09
When slack is required
in connection with transferring
a drop to another cable
a wire, reroute the drop around the bottom of the chamber
in a terminal equipped with wiring shelf or remove from the M rings at the top
pair or reinstalling
of the terminal.
Where still more slack is needed, splice wire inside the
terminal and run the spliced wire over the top as in the case of a new
connection.
4.10
Install cross-connecting
wires in accordance with the following procedures:
(1) Insert one end of the wire through the proper wiring hole for the binding
posts of distribution
cable pair.
For binding posts to the right of the
wiring holes, select a hole immediately
above the line of binding posts; for
those to the left of the wiring holes, select a hole immediately
line of binding posts.
below the
Select the inner of the two wiring holes of the
300-, 400-, and 600-pair terminals
for wires to be terminated
on the nearest
two pairs of binding posts, and the outer hole for connections
to the
farthest binding posts.
(2) Terminate
the cross-connecting
posts of a distribution
right-hand
wire under the lower washers on the binding
cable pair.
Connect the tracer conductor
to the
post.
(3) When cross-connection
is to be made on the same side of the chamber, run the
wire in the wiring channel behind the faceplate extension
and through the
proper wiring hole for the binding posts of the cable pair.
(4) When cross-connection
is to be made between opposite
sides of the chamber,
process as follows:
(a) In 100-, 200-, 300-, and 400-pair terminals equipped with wiring
shelves, route cross-connecting
wire terminating
on the top third of the
feeder cable pairs over the wiring shelf as illustrated
cross-connecting
remaining
wires in Fig. 19.
by
Run cross-connecting
wire to the
feeder cable pairs around the bottom of the chamber behind the
wire guards.
In the case of the 600-pair terminal, route
cross-connecting wires over any of the three wiring shelves in the back
of the chamber or around the bottom of the chamber, whichever provides
the shortest routing.
(b) In terminals not equipped with wiring
wire around the bottom of the chamber.
shelves, route cross-connecting
Do not run cross-connecting
wires through the M bridle rings provided at the top of the terminal
housing.
These rings are intended for drop wire connections.
Page 19
462-260-201SW
(5) Allow about 2 inches of slack in each cross-connecting
wire.
Where, on a
subsequent
line change, a wire is found to be too short, run a new
connection
rather than splicing out the short one.
(6) Where it is necessary
line, cross-connect
to assign two distribution
both distribution
Terminate one cross-connecting
cable pairs to form a party
cable pairs to the feeder cable pair.
wire under the lower washer and the other
wire between washers on binding posts of the feeder pairs.
two distribution
cable pairs are required
first two distribution
outlined.
cross-connect
bridges are connected one to each of the
cable pairs.
Terminate
one wire under the lower
washer and the other wire between washers on the binding posts of the
distribution
Page 20
pair.
the
cable pairs to the feeder cable pair as previously
The additional
associated distribution
for bridging,
When more than
46p-2fjo-2olsw
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BINDING
POST
COUNT
++
+00
0010
10
++++++++++++
[
?OUTE WIRES
ro TOP
/3 OF FEEDER
:ABLE
00+++++++++++++
PAIRS
)VER THE
#lRE SHELF
0000
0020
Ic.
++++++++
10
0
10
0
0++++++++++++
w::
+++++
@,+++++++++++
+’+++++++
0050
00
0
OC3
0++++++++++++++
++”+
0++++++++++++
+++++++
““”@++++++++++++&:
@++++++++++++
+++++++
@++++++++++++
+++++++
+@oo
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00
00
00
00
00
@+++++++++++
++++++++
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+++++++
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00
@+++++++++++++
F
:?++
IOUTE WIRES
rO BOTTOM
?/3 OF FEEDER
:ABLE PAIRS
AROUND THE
30TTOM OF
rHE CHAMBER
++++++
++++
00
++++
00
++~o
0++++++++++++
+++++++
0++++++++++++
+++++++
00
00
00
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0++++++++++++
+++++++
0++++++++++++
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00
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0
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Fig. 19 - Running Cross-Connecting
Wire
Page 21
462-260-201SW
5.
WALL-MOUNTED
5.01
TERMINALS
The wiring arrangements
arrangements
at wall-mou~ted
at strand- and pole-mounted
a neat and orderly
fashion.
block wires at wall-mounted
Page 22
terminals
is very much like the
terminals, and should always be done in
Refer to Fig. 20 through 25 for arranging drop and
terminals.
462-260-201SW
n
I
SPACE RINGS
2 FT APART
SPACE RINGS
2 FT APART
I
7/8 IN
DRIVE RING J
Ill 1111
N-TYPE TERMINAL
100R 16 PAIR SIZE
$
ALIGN RINGS
WITH SIDES
OF TERMINAL
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Fig. 20 - Wall-Mounted
10- or 16-
Pair Cable Terminal
=—[-’
Fig. 21 - Wall-Mounted
10- or 16-
Pair Cable Terminal With
Stub at Bottom
Page 23
462-260-201SW
—.-.-IL
7/8
IN. ORIVE RINGS
—
.-.
‘-”””- [.,[_
.1
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Fig. 22 - Horizontal-Mounted
Cable
Terminal With Stub Turned Up
Page 24
11
34
——.=-_
N-TYPE TERMINAL
IO OR16 PAIR SIZE
,,
Fig. 23 - Horizontal-Mounted
-—
~
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Cable
Terminal With Stub Turned Down
462-260-201SW
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APPROX
2 FT.
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311N.
1-114 IN
DRIVE
‘ ‘
!21NCQ
““””’--=t=t
B
II 6-----
RING RUN
FOR WIRES
TERMINATING
diil
!5--:
~-u .
31–
—
———
——
—
.
EEis
~~~
L-Ml &mR’1’E
~
~“
f“”-”--””
11
AH-E
OF TERMINAL
—.—
-hi
N-TYPE
1“”””--$
“l’-TERM’NAL
7
ULSLIL25PAIRSIZE
or
TO OPEN
TERMINAL
PULL OUT
COVER BY
THE BOTTOM
LID AND LOWER
~;
:~oM
,,//’/
_J
- PLACE WIRES SLACK
Y
:z~A’TJ!u
TO AVOID SHARP
BENOS AT RINGS
&TuRnlGH
i
ar
~
_w
RUN WIRE CONNECTIONS
]r
RIN;;;HEN”;OO
SHORT
FOR THREE RINGS
Fig. 24 - Wall Mounted
25-Pair Cable Terminal
With Stub at Top
Fig. 25 - Wall Mounted
25-Pair Cable Terminal
With Stub at Bottom
Page 25
462-260-201SW
5.02
See Section SW 462-240-900
for a description
of 400-2000A wire terminal.
The
400-2000A wire terminal supersedes the 101A, 101B, 101B2 and 101C wire
It is used for making party line taps in drop and block wire runs,
terminals.
in distributing
links .
drops from cable and open wire lines, and in placing fusible
The 400-2000A wire terminal should be mounted on poles on walls as shown
on Fig. 26, 27, 28 and 29.
fl
TO BTATION
P
DRIVE TIE B’,
OR ORIVE RING
12
PLACE
IN LINE WITH
OFIIVE TIE A,,
ORIVE RING
OR
PLACE BLOCK WIRE
BETWEEN TERMINALs
,J
\
.,
–-1..:;!;,.
.,.. ;-;,.
,
1,
~-.. t
~._> ,;’
:., I 3 IN.
:: q~
~’...,
..* -
UP TO FOUR
DROP WIRES
IN 400-20WA-TYPE
WIRE TERMINAL
1
6 IN
+%
7
TERMINATE
UP TO FOUR
OROP WIRES
IN400.20soA.TYPE
WIRE TERMINAL
..[.–
PLACE
4
IN LINE WITH
DRIVE TIE A,,
ORIVE RING
,, ‘#
oR k
Flg. 26 - Wiring 400-2000A-Type
Terminal
at Pole Mounted Cable ‘i’erminal
Paqe 26
~ ‘~!v
Fiq. 27 - Wiring 400-2000A-Type
at Strand-Mounted
Terminal
Cable Terminal
I
462-260-201SW
ATTACH 400-2CQOA-TYPE TER.
MINAL TO MASONRY WALL WITH
TW051161N
x 1 IN EXPANSION
SHIELDS ANO TO WOoo
WALL WITH TWO NO. 10x1 IN
LONG R.H. GALV. WOOD
SCREWS.
N-TYPE TERMINAL
10 OR 16 PAIR SIZE
NOTE,
PLACE ADDITIONAL 4C0-2000A-TYPE WIRE TERMINAL
AT LEAST 3-1/2 IN. APART,
Fig .29-
Wiring 400-2000A-Type
Terminal
with Horizontal Wall-Mounted
Cable
Terminal
-
Fig. 28 - Wiring
.._JL
400-2000A-Type
Vertical Wall-Mounted
Terminal with
Cable Terminal
Page 27
.
462-260-201SW
6.
,
BINDING POST CAPS AND INSULATORS
6.01
These instructions
insulators
cover the placing of binding post caps and binding post
in cable and wire terminals as protection
against accidental
on special service lines and as a means of minimizing
contacts
faceplate leakage.
Table A
Binding post caps and insulators may also be used to prevent corrosion.
lists the binding post caps and usage.
NOTE :
Special service lines cover such circuits as program supply, radio and
television network services, picture transmission,
teletypewriter,
fire,
police, power remote control, burglar alarm, etc.
TABLE A
BINDING POST CAPS
BINDING POST
CAP
B
COLOR
Red or Black
USAGE
On nonworking posts of N, T, and 61-type
cable terminals
c
Red or Black
On working posts of N, T, and 61-type
cable terminals
D
Red or Black
On 7A fuses installed
E
Red or Black
On 49--type cable terminals
F
Red or Black
On B buried cable terminals and connecting
in L type fuse chambers
blocks equipped with insulation crushing
washers - 30-2, 57B, and 57A types
G
Red or Black
On 30-type connecting blocks
—
H
6.02
On 31-type connecting
blocks
The B binding post cap is a molded neoprene cap which completely
nonworking
6.03
Red or Black
covers
binding posts in N, T, and 61-type cable terminals.
The C, E, F, G, and H binding post caps are similar to the B cap in design,
except they have a hole and slit on the side to permit their installation
wires terminated on binding posts.
Page 28
over
I
462-260-201SW
6.04
The D binding post cap is similar to the B cap except it has a small opening at
one end.
This cap is designed to fit over the end of a 7A fuse installed in
L-type fuse chambers.
6.05
.Binding post caps are supplied in red and black colors as a means of identifying
the types of circuits on which they are being used.
use on special service lines as protection
black for minimizing
6.06
is a phencl fiber sleeve, open at both ends and
to admit wire termination
insulators have a red enamel finish.
6.07
contacts and the
faceplate leakage and other purposes.
The binding post insulator
slotted lengthwise
The red cap is intended for
against accidental
on the binding post.
Binding post insulators are intended as
protection
against accidental
terminated
in terminals not suited to the use of binding post caps.
Particular
care shall be exercised not to dislodge
binding post insulators
These
contacts
for special service lines which are
the red binding post caps or
associated with special service lines while working in
terminals, nor should they be moved without proper authorization.
PLACI~JG BINDING POST CAPS
6.08
Terminal blocks and binding posts which show evidence of corrosion,
residue or other foreign deposits
equivalent) , as shown in Section 644-203-1O1.
after all moisture
6.09
(or
Install the B bincling post caps
is removed from around the bi~ding posts.
More effective protection
against corrosion,
provided with the use of a gel-filled
be cleaned and moisture
6.10
insect
should be cleaned with Freon MS-181
insect residue, etc., may be
binding post cap.
removed as previously
mentioned
The binding posts must
in paragraph
6.08, prior
to installation
of the gel-filled
When inst~lling
the B binding post caps, first turn down the nut of the binding
post fingertight.
caps.
Force the cap over the binding post, without twisting, until
the skirt of the cap is in good contact with the faceplate.
If the cap is
twisted while being forced over the binding post, the skirt of the cap may fold
under ‘instead of seating squarely on the faceplate as desired.
Figure 30 shows
a Properly placed binding post cap.
6.11
Binding post caps come in seven sizes znd are used as listed in Table A.
6.12
Prepare the binding posts for the placing of C, E, F, G, and H binding post caps
as indicated
6.13
in paraqraph
6.08 for the B caps.
Place the caps over the binding post with the slit in the line with the
terminated wire.
Force the cap down over the binding post with terminated wire
in the slit until the skirt of the cap is in good cc~fitactwith the faceplate.
Adjust the terminated wire so that it is positioned
inside the hole of the cap
as indicated in Fig. 31.
Page 29
I
462-260-201SW
/
FORCE
B BIN DiNG
POST
CAPS
OVER BINOING
POSTS wITHOUT
TWISTING
UNTIL
CAP SKIRT
IS
IN GOOD CONTACT
WITI{ FACE PLATE
CLEAN 81~JDl NG POSTS
ANO FACE PLATE ANO
TIGHTEN
TOP NUTS
BEFORE PLACING
B BIN OING POST CAPS
Fig. 30 - Placing B Binding Post Caps
Pac3e30
=FoRCE
C BINDING
POST CAPS OVER
BINOING
POSTS WITHOUT
TWISTING
UNTIL CAP SKIRT IS IN GOOD
CONTACT
WITH FACE PLATE
Fig. 31 - Placing C Binding Post Caps
I
462-260-201sw
6.14
The C binding post caps are shown in Fig. 31.
The E, F, G, and H binding post
caps are installed in the same general manner.
Figure 32 illustrates
an E
binding post cap placed inside a 49-type terminal.
\
FORCE
E BINDING
POST
CAP
OVER EINOING
POST WITHOUT
TWISTING
UNTIL
CAP SKIRT IS
Id GoOD CONTACT
WITH FACE
PLATE
Fig. 32 - E Binding Post Caps Placed in 49-Type Cable Terminal
6.15
To place the D binding post cap in 7A fuses installed in L-type fuse chambers,
force the cap down over the end of fuse until properly
seated.
PLACING BINDING POST INSULATORS
6.16
Install binding post insulators
snugly over binding posts.
Where the insulator
fits loosely, place a piece of tape around the binding post inside the insulator
to obtain a snug fit.
6.17
Binding post insulators come in four sizes and are used as listed in Table B.
TABLE B
BINDING POST INSULATORS
COLOR
BINDING POST
INSULATOR NO.
USAGE
Red
1
On binding posts having 3/8-inch nuts and also the 7T fuse
Red
2
On binding posts having 7/16-inch nuts and also the 7A fuse
Red
3
On screw-type binding posts of BD terminals
Red
6
On termination of alarm and contractor circuits in T
pressure contactor-terminals and 3-pair gastight terminals
Page 31
31 Paqes