PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
SECTION 1
ELECTRICAL SYSTEM
1.0 General Scope of works
The design proposal and requirements contained herewith shall cover all electrical
services and shall include supply, delivery, installation, commissioning and
maintenance of all equipment necessary to provide an efficient, safe and satisfactory
installation, taking into consideration of all Code of Practices and compliances to
authorities for the electrical workers.
Contractor shall be responsible to engage the service of licensed electrical worker
(LEW) of the appropriate grade to help in the design, planning, endorsement and
execution of the works and liaise with building LEW, including fees for shut down,
testing, commissioning and turn on arrangement.
All materials, equipment and the complete installation work shall comply with the
requirements of the current editions of the following Standards, Codes and Guides
including the following:
(i)
(ii)
(iii)
(iv)
(v)
SS CP 5:
Code of Practice for Electrical Installation
SS 551:
Code of Practice for Earthing
SS CP 17: Code of Practice for the Maintenance of Electrical
Switchgear for voltage up to and including 22KV
SS 535:
Code of Practice for Installation, Operation, Maintenance,
Performance and Construction requirements of Mains Failure Standby
Generating Systems
SS CP 88: Code of Practice for Temporary Electrical Installations for
Construction and Building sites
Section A - Distribution Boards
1.0 General
1.1
Three phase circuit breaker distribution boards shall be of the dead-front
safety type equipped with thermal magnetic miniature circuit breakers of the
frame sizes, types and ampere trip ratings specified on the accompanied
distribution board drawings.
1.2
All distribution boards shall be rated at 415 Volt A.C. 50 Hz for three phase 4
wire supply and shall comply with the latest British Standard BS 5486 part 12
for distribution boards.
PART 2 OF P1
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.3
Distribution boards shall have general purpose enclosures and shall be
surface mounted except where otherwise indicated (FM) for flush mounting.
1.4
All miniature circuit breakers (MCBs), single phase and three phase circuit
breaker distribution boards shall be from the same manufacturer.
1.5
All circuit breaker distribution board shall be of the approved type.
1.6
All doors of circuit breakers distribution boards shall be equipped with masterkeyed safety cylinder locks to prevent unauthorized personnel to switch on or
off the main and branch breakers. The no. of locks depends on the length of
the door.
1.7
The minimum short-circuit capacities of R.M.S. symmetrical amperes of circuit
breaker distribution boards and incoming circuit breakers, if applicable, shall
be of the same kA rating of the specified short-circuit capacities of the
incoming circuit breaker.
1.8
The interior assembly for the connection and mounting of the MCB must be of
good quality, type tested and approved type.
2.0 Construction
2.1
The distribution boards shall conform to the following construction to form a
single or group of boards.
2.1.1 Business Assembly and Temperature Rise
Distribution board bus structure shall have the same current rating (ampere
frame) of the incoming breakers as shown on the accompanied distribution
boards drawings. In any case, a current density of max. 155 Amperes per sq.
cm (1,000 amperes per sq. in.) of cross-sectional area shall be maintained.
However, the ratings shall also be established by heat riser tests with
maximum hot spot temperature on any connector or busbar not exceeding
50C rise above ambient temperature. All the busbar shall be of tinned hard
drawn copper rated at 200 A. Pre-drilled copper neutral bar of full current
rating and pre-drilled copper earth bar of size equal to incoming feeder earth
cable shall be provided and neatly arranged. Neutral and earth bars shall be
of solderless mechanical type connectors. The neutral bars shall be mounted
to the distribution boards by non-hygroscopic insulators. The insulation of
resistance of neutral bars to the metal enclosure shall be infinity and for earth
bars to the metal enclosure shall be zero. The number of neutral bar terminals
to be provided shall be the same as the total number of branch circuit
breakers ways plus one for incoming feeder neutral cable. The number of
earth bar terminals to be provided shall be the same as the total number of
PART 2 OF P2
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
branch circuit breakers ways plus one for incoming feeder earth cable and
plus two for the separate earthing points for the equipment/accessories.
Phase bussing shall be full length without reduction. Busbar taps for
distribution boards with single pole branches shall be arranged for sequence
phase connection of the branch circuit devices that allows complete flexibility
of circuit arrangement (1, 2 or 3 – pole circuit breakers). Phase busbars shall
be fully protected with an integral, high impact, thermoplastic shroud.
2.1.2 Miniature Circuit Breakers (MCB)
Miniature Circuit breakers shall be equipped with individually insulate, braced
and protected connectors. The font face of all miniature circuit breakers shall
be flush with each other. Miniature circuit breakers shall refer to technical
specification miniature circuit breakers (MCBs) for distribution board. Space
provisions for additional circuit breakers shall be so designed that additional
breakers shall be plugged-on to the bus-tap by pressure without using
additional connectors. Cable or copper bar links, modification or alteration to
the distribution board.
2.1.3 Each distribution board
As a complete unit, shall have a rating equal to or greater than the integrated
equipment rating shown on the drawings. Such rating shall be established by
test with the circuit breakers mounted on the distribution boards. The shortcircuit tests on the circuit breaker and on the distribution structure shall be
made simultaneously by connecting the fault to each distribution board circuit
breaker with the distribution board connected to its rated voltage source. The
method of testing shall be according to proposed British Standard (B.S)
pertaining to listing of miniature circuit breakers for high-short circuit capacity
ratings. The source shall be capable of supplying the specified distribution
board short-circuit current or greater. Test data showing the completion of
such test upon the entire range of distribution boards to be furnished shall be
submitted to the Superintending Officer, if requested by him/her, with or
before the submission of drawing for approval. Testing of distribution board
circuit breakers for short-circuit breakers for short-circuit rating only with the
circuit breaker individually mounted and testing of the breaker individually
mounted and testing of the bus structure by applying a fixed fault to the bus
structure alone is not acceptable.
2.1.4 Cabinet
Distribution board assembly shall be enclosed in a Zinc plated sheet steel
cabinet unless otherwise stated. The rigidity and gauge of steel shall be as
specified in British Standard. Doors of all distribution boards shall be lockable
by means of a barrel-type lock with detachable master-keys. Hinged sheet
steel door over 1.2m long shall be equipped with two (2) safety cylinder locks.
Top and bottom wall shall be removable for the ease of cutting rectangular
PART 2 OF P3
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
holes for the connection of metal trunkings. The steel enclosure shall be antirust treated and finished with an electrostatically deposited light grey powder
coating. The hinged door shall conceal the retaining screws of the front cover
to prevent unauthorized personnel removing the front cover. Flush mounting
distribution board shall have removable, adjustable depth interiors to allow for
varying thickness of wall finishes. All the ventilation louvre shall complete with
very fine wire mesh net welded permanently on the inside of the panel.
2.1.5 Safety Barriers
The distribution board interior assembly shall be dead front with distribution
board front removed (i.e. cover with approved thickness of insulation board).
Also, it shall be possible to change branch circuit load connection without
personal exposure to any live side bussing on live terminals. Spaces for future
installation of circuit breakers shall be covered by clip-on type of non-metallic
plates. Main lugs or main circuit breaker shall have barriers on live sides. The
barrier in front of the main lugs shall be hinged to a fixed part of the bus
structure opposite the mains shall have barriers. Ampere clearance shall be
provided between live parts and the sheet-steel protection to allow cables to
be brought to their respective terminals in a neat and workmanlike manner.
2.2
Three phase and neutral distribution boards shall be such a way that three (3)
single-pole breakers shall be replaced by one (1) three-pole breaker of the
same frame size to give 3-phase 415 A.C. Supply or vice versa without
altering the bus or adding jumper cables or copper links. The minimum shortcircuit capacity mentioned in the Technical Specifications or indicated on the
distribution board drawing shall be maintained.
2.3
All distribution board shall also be designed for bottom incoming and top
outing circuitry unless otherwise stated.
3.0 Labelling
3.1
Thermal marking on approved marker label or foil tape system for large
permanent individual number shall be affixed permanently to each branch
circuit breaker and incoming main circuit breaker in an uniform position.
3.2
Each individual cable shall be numbered with thermal marking on PVC or heat
shrinkable tube system according to the As Built distribution board drawing
and the Contractor shall in addition hang a good quality plastic bag beside the
distribution board with a copy of floor plan or a portion of the floor plan which
is served by the associated distribution board, and a typewritten table showing
the circuit numbers and room number/designations in approved arrangement
according to the As Built circuit breakers layout of each distribution board.
PART 2 OF P4
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
3.3
All nature and earth continuity conductors shall be installed in sequence and
numbered with thermal making on PVC or heat shrinkable tubes system to
label according to the circuit numbers shall be as follows.
1L1,1L2, 1L3,2L1, 2L2, 2L3,3L1, L2, 3L3, 4L1,4L2, 4L3, 5L1, 5L2,5L3,6L1,
6L2,6L3 etc.
3.4
All distribution boards shall be clearly, permanently labelled according to the
As built distribution boards (BLACK in white lettering for normal supply, RED
in white lettering for emergency supply).
Section B - Miniature Circuit Breakers (MCB)
1.0
General
1.1
Miniature circuit breakers shall comply with the latest IEC 60898 Standard
with latest amendments test duty sequence 240V, 50Hz for single pole and
230/415V, 50Hz for multi-poles.
1.2
Unless otherwise stated, miniature circuit breakers and distribution boards
shall have minimum short-circuit capacities of R.M.S symmetrical amperes of
6A for lighting circuit distribution boards and 10KA for power or mixture of
lighting power circuit distribution boards at 240 or 230/415,50Hz.
1.3
All miniature circuit breakers (MCB) shall be calibrated at ambient
temperature of 40῾C and carried their rated current continuously when
operated in free air this temperature.
1.4
Miniature circuit breakers and the distribution board enclosure shall be from
the swim manufacturer.
1.5
Irrespective to the mounting positions, the miniature circuit breakers shall be
operated according to the factory calibrated characteristic.
1.6
The contacts shall be maintained minimum 5 mm apart when it is at OFF
position.
1.7
All miniature circuit breakers shall be of position plug-on no error connection
type.
1.8
Miniature circuit breaker must have positive contact position indictor.
2.0
Operation
2.1
Miniature circuit breakers shall be operated by a toggle-type handle and shall
have a quick-made, positive quick-break over centre switching mechanism
that is mechanically trip free from the handle so that the contacts cannot be of
positive quick-make and quick-break on manual and automatic operation.
PART 2 OF P5
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
2.2
Contact position indicator (Coloured) linking physically to the contacts for the
positive indication of isolation-be provided.
2.3
Two and three pole circuit breakers shall be commonly tripped with individual
spring pressure on each contact.
2.4
The magnetic operation (instantaneous Trip) of these MCB shall be tripped
between 3 to 5 millisecond.
3.0
Construction
3.1
The Magnetic operation (Instantaneous Trip) of these MCB shall be tripped 3
to 5 Millisecond.
3.2
Each pole of the circuit breakers shall have a factory calibrated thermal bimetal overcurrent element with inverse time delay characteristic and a factory
calibrated thermal bi-metal overcurrent element with inverse time delay
characteristic and a factory calibrated instantaneous magnetic tripping device
for short circuit condition. Ambient temperature compensation shall be
accomplished by a secondary bi-metal that shall allow the circuit breaker to
carry rated current between 25῾C to 40῾C with tripping characteristics that are
the same throughout this temperature range, and that shall not cause
nuisance tripping.
3.3
Circuit breakers shall be completely enclosed in a high dielectric strength
casing. The properties of the dielectric strength casing shall not dielectric
strength casing. The properties of the dielectric strength casing shall not
deteriorate with time.
3.4
Contacts of circuit breaker shall be sliver-tungsten or sliver-graphite for
ensuring a reliable contact of low resistance and highly resistant to welding.
3.5
The high pressure plug-on busbar connector shall assure solid positive
contacts without screw to tighten to tighten and no chance of error.
3.6
Load terminals shall be constructed to assure electrical efficiency and
reliability, with minimized possibility of localized hating, and for straight in
wiring.
3.7
Arcing shall be extinguished rapidly and effectively by arc chute barrier, in
normal switching as well as protective tripping, to minimized deterioration of
contacts and adjacent insulating materials.
3.8
Trip indication shall be by means of the handle position lying between ON and
Off. To reset the tripped mechanism, the handle shall be moved to extreme
OFF position.
4.4
Residual Current Circuit Breakers (RCCB)
PART 2 OF P6
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.1
Residual current breakers (RCCB) shall be current operated with milliampere
tripping current and continuous load current as shown on the accompanied
drawing.
4.2
All residual current circuit breakers (RCCB) hall bear with local authority trade
mark.
4.3
For single phase supply, the residual current breaker (RCCB) shall be rated
240 Volt 50Hz A.C 2 poles. For three phase supply, the residual current circuit
breaker (RCCB) shall be rated 415 Volt 50 Hz A.C poles. All RCCB shall be
surge proof design to prevent nuisance tripping due to transient over-voltage.
A local trip indication in the form of window on the front face of the RCCB
shall be provided to differentiate between OFF and TRIPPED position. A test
button shall be incorporated to enable periodic check on the tripping
mechanism of the RCCB.
4.4
All incoming and outgoing cables, and copper links connected to residual
current circuit breakers (RCCB) shall be insulted.
Section C - LV Cables
1.0 General
1.1.
This section covers the general requirements for LV cables to be carried out
under this contract.
1.2
The Contractor shall design, supply, deliver, install, test and commission all
cables and accessories for the complete, safe and satisfactory of the plant.
2.0
Codes and Standards
2.1
All cables shall be manufactured to the latest British, IEC and Singapore
Standards, Codes of Practices and statuary Regulations including all
amendments.
3.0
PVC Insulated Cables
3.1
The copper conductor shall be stranded and plain annealed and the insulation
of flame retardant PVC to BS 6004:1984: or SS.50:1981, Cables for single
phase and three circuits shall be 450/750V grade.
4.0
PVC Armoured Cables
4.1
The cables shall be manufactured to BS 6364 and shall be 600/1000V grade.
PART 2 OF P7
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.2
Conductors shall be plain annealed copper circular stranded or shape
stranded. Each core shall be PVC insulate, cores laid-up and PVC tape
bedded, and steel or aluminium wire armoured. The cables shall be sheathed
with PVC sheath.
5.0
XLPE/PVC Cables
5.1
XLPE/PVC insulated copper circular stranded or shape stranded. Each core
shall be PVC insulated, cores laid-up and PVC tape bedded. The insulation
shall be XLPE extruding over the conductor to the wall thickness specified in
IEC 502 para 4.2.6. For multi-core are cables, the core are suitably laid-up
with fillers and tape bedded over the entire assembly, the over sheath of cable
shall consist of an extruded layer of black PVC.
5.2
The multi-core cables shall be identified by Black, Brown, Black, and Grey.
5.3
For armoured XLPE/PVC cables, round wire aluminium armour shall be used
and applied on an extruded PVC inner covering.
6.0 Fire Resistance Cables
6.1
Conductor shall be of high conductivity copper wire stranded. Each core is
insulated with flame retardant low smoke halogen free compound. The cores
are suitably laid-up, filled with filler and tape bedded. The cable shall be
manufactured comply with SS 299: Pt1:1985 and related standards.
(i) IEC 331
(ii) BS 6387
maintain
(iii) BS 6724
- Fire resisting characteristics of electric cables
- Performance requirements for cables required to
circuit integrity under fire conditions
- Smoke emission test
6.2
The minimum size of each conductor shall be 2.5mm2.
6.3
Fire resistant cable shall be strapped or tied to the cable support system using
stainless steel cable ties or stainless steel strapping which are tested and
approved for use in fire resistant wiring system.
6.4
All relevant test certificates of the cables shall be submitted to the
Architect/S.O for approval prior to ordering.
7.0
Cable Marking
7.1
The standard marking of all cables shall be marked on the external surface of
outlet sheath with voltage designation, manufacture’s name, year of
manufacture with a suitable method.
PART 2 OF P8
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
8.0
Fire Barrier
8.1
Where trunking, ducts and trays pass through fire rated floors and walls, they
must be fitted with internal fire barrier to prevent the spread of fire, and holes
made in the structure must be made good. The fire barrier material must have
the same fire rating as the walls and floors.
9.0
Cable installation
9.1
The cables shall be installed in accordance with the Singapore CP 5:1998.
The cable size shall be selected to ensure that it has adequate current
carrying capacity and that the voltage drop at the apparatus supply does not
exceed the approved limit of 4% from main source.
9.2
The contractor shall provide all the necessary sleeves, trays, conduits,
trunking, supports, glands, shrouds, end boxes, clamps, specialist tools for
cable laying and termination etc, necessary to install and make off cables in
accordance with good engineering practice and as hereunder specified and
shown in the Drawing.
9.3
All cables shall be provided with identification labels at each end at all
positions where cables change direction. In instance where cables are
multiple runs, labels shall be provided at 10m intervals. Labels shall be
manufactured from metal disc engraved to show the size of cable and the
equipment being fed. Cables for 3 phase, 4-wire system shall be colour coded
–red, yellow, blue for phase, black for neutral, green for earth.
9.4
Where multicore cables are for identification, protection and control
applications, each core shall have an identification number. In addition the
cable tails shall be identification number. In addition the cable tails shall be
identified with engraved ferrules. All wires shall be terminal with an approved
type of lamp connector. Pinching screw type connectors, shall not be
acceptable.
9.5
Cables running horizontal at high level shall be in general be supported by hot
dipped galvanised steel perforated trays of minimum 2mm thick and with
returned edges. It shall be supported from the rib of structural slab beams etc
by galvanised steel rods and not less than 15mm diameter, with underslung
steel angle supports, sample of the supporting brackets shall be submitted for
approval.
PART 2 OF P9
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
9.6
The tray shall be supported at such intervals to ensure that tray sag shall not
be more than 1/500 when loaded with cables, otherwise corrective measures
shall be carried out to the Architect/S.O. satisfaction.
9.7
Where cables are clipped to walls or ceilings, they shall be secured by means
of space saddles. The spacer saddles shall e of the hot dipped galvanised
steel deep spacer type fixed to the surface by means of rawl lugs or other
equal manner and fixed to its base by two cadmium plated fixed to tis base by
two cadmium plated fixing screw.
9.8
The contractor shall be responsible for the offloading and handling of the
cables on site and shall ensure that cables are delivered to site on drums and
properly protected against mechanical damage.
9.9
No straight through joints shall be allowed unless approved by the
Architect/S.O.
9.10
No PVC conduit shall be used for concealed wiring.
9.11
All fire resistant cables shall be installed on a separate cable tray without
sharing with other submain /control cables. For emergency final circuit, the FR
cables shall be installed in G.S conduits in concealed slab or wall unless
approved by the Architect/S.O.
9.12
No PVC conduit shall be used for concealed wiring.
9.13
All fire resistant cables shall be installed on a separate cable tray without
sharing with other submain/control cables. For emergency final circuit, the FR
cables shall be installed in G.S conduits in concealed slab or wall unless
approved by the Architect/S.O.
9.14
Each circuit wiring shall have its own protective conductor with adequate
sized in accordance with CP: 1998.
9.15
Cable cores entry into the switchboards shall be made through approved
cable glands adequately sized for all cables.
9.16
Cable cores shall be terminated by compression method only. Cables should
not be bent to radius less than eight times their overall diameter.
9.17
Cables installed in vertical ducts or rises shall be cleated with proper cable
clamps at distances not exceeding one meter.
9.18
In areas where cables pass through floors, walls or partitions, sleeves of an
approved type must be supplied and set in position by the Contractor. After
the installation, the sleeves must be thorough grouted in or otherwise securely
fixed in positon and the space between the cables and the sleeves completely
filled with approved fire-resistance material and which has no detrimental
effect on the cable sheath.
10.0
Cable Tray Installation
PART 2 OF P10
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
10.1
All cable trays shall be perforated manufactured from 2.00mm thick mild steel
and shall be hot-dip galvanized or paint finished after perforation.
10.2
Unless otherwise specified, nominal widths of cable tray and accessories,
thickness of steel, flanges on trays ends or tees, shall be as follows.
Width of
Tray (mm)
50
75
100
150
225
300
375
450
600
800
1000
Thickness of
Steel (mm)
0.9
0.9
0.9
0.9
0.9
1.2
1.6
1.6
1.6
2.0
2.0
Flanges on Tray
Bends or tees (mm)
13
13
13
13
13
20
20
20
20
20
50
10.3
All bends and tees shall be 90o bends or tee-offs with minimum 50mm inside
bend radius. Bends in cable trays shall be such that the bend radius of the
largest cable to be clipped to the tray does not exceed the bend radius shall
limit as defined in the Singapore Standard CP5:1998.
10.4
The cable tray shall be fixed in such a manner that it is rigid throughout its
length with a minimum of 13mm clearance between the tray and the structure.
Where cables are enquire to pass through the tray, the holes so made shall
be protected by means of a lead or grommet which shall be fitted completely
round the circumference of the hole.
10.5
When two straight lengths of cable tray are to be joined together, an external
coupler shall be used to prevent any sag or bending at that point. The coupler
shall be joined to each length of tray by means of not less than two roundheaded screws and nuts. The round –headed screws shall be fixed from the
side of the tray on which the cable are to be secured. The screws and nuts
shall be non-corrodible, preferably galvanized.
10.6
When a cable tray must be cut, the edge shall be smoothed with a file and
cold gal vanishing paint shall be applied to the exposed metal. Such painting
shall be done as the work proceeds.
10.7
Saddles for securing cables to the tray shall be made from flame—retardant
PVC covered metal strip, and shall be secured to the tray by means of noncorrodible cheese-headed screws and nuts. The shanks of the screws shall
not protrude beyond the nits by more than three threads. Where saddles
exceed 150mm in length, intermediate fixings shall be provided such that the
maximum spacing between screws does not exceed 150mm.
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PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
10.8 All accessories associated with the cable tray systems, including supporting
rods, channels, etc., shall be quick-fixing type to the Architect/S.O approval.
11.0 Trunking Installation
11.1
Trunking shall be manufactured in mild-steel with additional paint finish
applied at manufacturer’s works. Trunking shall have a removable cover
throughout its length with certre-screw latch fixing or quick –fixing device to
the Architect/S.O approval, size up to 100mmx100mm shall be 1.6mm thick –
fixing and 150mm 75mm to 150mmx 150mm shall be 1.8mm thick. The
trunking shall normally be supplies in 2400mm lengths, each length being
supplied with a sleeve-type coupling and a copper earth bonding link, Bonding
Link shall be fixed on external surfaces unless otherwise specified.
11.2
All bends, tee pieces, top ends, outlets, intersections and adaptors shall be of
the same manufacture as the trunking. All inside edges of trunking shall be
smooth and provision shall be made to prevent abrasions at bends.
11.3
Trunking shall be adequately support throughout its length. Trunking support
and channel shall be quick-fixing type and shall be such as to space the
trunking a minimum of 6mm form any part of the wall or bulkhead. The
minimum spacing between fixings shall be as follows.
Trunking Size
Up to 50mm x 50mm
Up to 75mm x 75mm
Up to 150mm x 150mm
Up to 225mm x 150mm and greater
Maximum Distance
900mm
1200mm
1500mm
1800mm
11.4
A minimum of two fixing shall be provided between joints in the trunking
except where the distance between joints is less than the maximum spacing.
11.5
Where trunking is suspended, the suspension shall be rigid. At the
suspension point the trunking shall be reinforced by a plate or washer of
minimum thickness 3mm or 10 s.w.g whose cross-sectional area shall not be
less than half that of the trunking (cross-section area). Unless additional
stiffening which has been approved by the Architect / S.O is provided, the
spacing between suspension points shall not be greater than those shown the
table above.
11.6
Every section and joint of metal trunking carrying wires shall be bonded with
3mm x 25mm coper tape to ensure overall continuity and to achieve an
acceptable earth loop impedance level in compliance with the latest edition of
the Singapore standard CP5:1998. Removal of any lid no matter how it is
fitted shall not affect the earth continuity of the trunking.
11.7
Where trunking is cut or drilled, the edges of the trunking which are cut shall
be smoothed to prevent abrasion of the cable and shall be painted with antiPART 2 OF P12
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
corrosion paint, to the same colour as the adjacent surface, such painting to
be carried out as the work proceeds. In no circumstances will rough screw
edges and nuts be allowed in the interior of the trunking where the cables are
to be routed.
11.8
The space factor for cables installed in trunking shall not exceed 45%.
11.9
All Lengths of vertical run trunking in excess of 3000mm, shall contain cable
supports made of insulating, non-hygroscope, non-combustible material. The
spacing between such supports shall not exceed 1800mm. An additional
support shall be provided at the top of all vertical runs exceeding 3000mm, to
support the weight of the cable and distribute the cables within the prevent
undue compression of the installation.
11.10 Special trunking accessories shall be provided for cable trunking installation at
expansion/movement joints.
12.0 Conduit Installation
12.1 General
a) All conduits and fittings used in the installation, except flexible conduit, shall
comply with BS 46568: Part 1 and 2 class 4 and subsequent amendments for
surface wiring and Class 3 for concealed wiring.
b) Flexible conduit and fittings shall comply with BS 731 part I and in addition shall
be of the metallic watertight pattern. PVC over sheathed, and with a separate
earth wire closed within the conduit.
c) The minimum size of conduit in the installation shall be 20mm dimeter.
d) Separate conduits shall be provided for circuits at extra low voltage.
e) Inspection – type conduit bends. Elbows and tees shall not be permitted.
f) Standard conduit and draw in boxes and covers shall comply with the appropriate
BS and in an addition shall be galvanized malleable cast-iron or steel. Draw in
conduit and cables entering the boxes shall be installed accessible positions.
g) All boxes and conduit accessories shall be fully wealth proof when used in outdoor
locations. Weatherproof boxes and conduit accessories shall also be used
locations other than outdoors when so specified or as directed by the Architect
/S.O Weatherproof boxes and conduit accessories shall also be used in locations
other than outdoors when so specified or as directed by the Architect/ S.O
PART 2 OF P13
PART 2: GENERAL AND TECHNICAL SPECIFICATION
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Appendix C, Annex A1
SECTION 1 TO 9
Weatherproof is defined as degree or ingress protection to IP54 in accordance
with IEC 529.
h) All draw boxes and junction boxes shall be of ample size to permit the cables
being drawn in and out. They shall be made of galvanised malleable iron with
jointing surfaces machined to ensure a dust-tight joint. All circuit boxes shall be
provided with long spouts internally threaded incorporating a shoulder for the
proper butting of the conduit and a tapped 5mm hole in the base to accept a solid
brass earth terminal.
i) The ends of all conduit shall be re made to remove all burrs or sharp edges after
the screw threads have been cut. All dirt, paint or oil on the screwed threads have
been out. All dirt, paint or oil on the screwed thread of the conduit, sockets and
accessories shall be removed before installation.
j) The ends of the conduit shall but solidly in all couplings. Where they terminate in
fuse-switches, fuse boards, adaptor boxes, non-spouted switch boxes, etc.., they
shall be connected thereto by means of smooth bore make brass bushes,
compression washers and sockets. All exposed threads and all bends shall be
painted with an aluminium spirt paint after installation. Exposed metal shall be
similarity treated.
k) Particular care shall be taken to ensure that no water is allowed to enter the
conduit at any time and all conduits shall be arranged with arranged with adequate
ventilation and drainage. Inaccessible junction boxes will not be allowed.
l) Particular care shall be taken to ensure that no water is allowed to enter the
conduit at any time and all conduits shall be arranged with adequate ventilation
and drainage. Inaccessible junction boxes will not be allowed.
m) The ends of conduits or set in formwork prior to concreting shall be temporally
seated off with a coupler and a solid brass plug.
n) All bends are to be made on site to suite conditions. An adequate number of
suitably sized hot-dipped galvanized cast iron draw-in boxes shall be provided in
conduit runs to enable cables to be drawn in easily and without damage. Draw-in
boxes shall be fitted after every two bends, or after a maximum straight run of 15m.
Tees, elbows and sleeves with used, shall be of an approved type.
o) All conduits shall be swabbed through, before wiring is commenced and cables
shall not be drawn into any section of the system until all conduits and draw boxes
for that particular section are fixe in position.
p) Wiring shall be carried out on the looping-in system and no joints other than at
looping-in points will be allowed.
q) No cables installed in conduit shall be laced.
13.0 Surface Conduit
PART 2 OF P14
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
13.1
All conduit boxes and accessories or surface conduits shall be of a type
manufactured specifically for that purpose.
13.2
Where surface conduit is specified, it shall be fixed by means of distance
saddles and shall terminate in deep pattern conduit boxes, Surface conduits
shall not be bent or set to enter accessories, and where the turn through walls,
back-outlet boxes shall be provided. Conduit in ceiling
14.0 Concealed/Cast-in Conduits
14.1
Conduit installations in some of the main structural members e.g. column,
slab, r.c. wall etc. in conspicuous public areas shall be of concealed/cast-in
type as specified and/or shown on the Drawings.
14.2 All conduit boxes and accessories for concealed/cast-in conduit system shall
be of the type specifically manufactured for that purposed.
15.0
Concealed conduits
15.1
Concealed conduits shall be provided.
15.2
All conduit installations shall be carried out by the Contractor, spacing
between concealed conduits entering the draw-in box hall not be less than
25mm so as to allow concealed aggregate to pass and set between conduits.
All plastering-up works consequent to the conduit installation shall be carried out.
16.0 Cast-in Conduit
16.1
Cast-in conduit, if any, shall be supplied and installed by the Contactor, as
shown on the drawings.
16.2
A 1.6mm diameter, galvanized draw-wire shall be left behind in each conduit
to facilities subsequent pulling of cables through the conduit.
16.3 The Conductor shall pick-up the conduit installation form the cast-in outlet
boxes, as shown on the drawing.
Part D - Surge Protection Devices
1.0 General
1.1 This section of the specification covers the supply, installation and the testing for
the surge protective devices and is to read in conjunction with the drawing.
PART 2 OF P15
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.2 The System shall be installed according to the following standards. Where the
publications are referenced throughout this specification and shall apply when
relevant.
1.2.1 UL 1449-1987 Transient Voltage Surge Suppressors.
1.2.2 ANS/IEEE C62.41-1991 Recommended Practice on Surge Voltage AC
Power Circuits.
1.2.3 ANS/IEEE C6233-1982 Standard Test Specifications for Visitor Surge
Protective Devices.
1.2.4 ANS/IEEE C62.45-1987 IEE Guide on Surge testing for Equipment
connected to Low-Voltage AC Power Circuits.
1.2.5 IEC 80 1-5 Surge Immunity Requirements
1.2.6 Surge Protection Devices installed should generally comply with either
one or more standards listed:
a) ANS/IEEE C62.41-1991 Recommended Practice on Surge
Voltage in Low Voltage A.C Power Circuit
b) VED 0675, Part 6 and Part6/A1 over Voltage arrester for the use
in a.c networks with nominal voltages between 100v and 1000v
c) BS6651:1992 Protection of structures against lighting Protection
d) CP33:1996 Lightning Protection
1.3
All components shall be from the same manufacturer to ensure system
performance is fully coordinated.
1.4
Surge Protective devices (SPD’S) shall be installed at each main
switchboards and at distribution switchboard supplying critical equipment
(computers, PLC’s etc.) and original devices as indicated in the drawings.
1.5
SPD must be denote its application based on location and/or category, its
MCOV and nominal discharge current on the body of the SPD.
1.6
The coordinated SPD for the low tension main switchboards and distribution
boards shall limit the transient voltage to below equipment levels, when tested
in accordance with VDE0675 or other international standards.
1.7
Let through voltage for different categories shall comply as closely as possible
with those specified in the table below tested at respective surge current.
BS 6651, CP33
VDE 0675
Surge(8/20)
Class C
Class B
Residual Voltage
L-E
Class B
Class C
Residual Voltage
L-E
PART 2 OF P16
Class A
Class D
Residual Voltage
L-E
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
3kA
5kA
10kA
15kA
20kA
80KA
100KA
600V
625V
668V
670V
710V
840V
1520v
600 V
600V
600V
600V
600V
750V
770v
600V
600V
580V
570V
590V
680V
680v
1.8
Tested to comply with BS6651:1992Category B-High (6V 1.2/50ps open
circuit voltage, 3kA 8/20ps short circuit current)
1.9
Let-through voltage<600V
2.0 Main Switchboard Surge Protective Devices
2.1
The Minimum acceptable requirements for a main switchboard SPD are as
follows
2.2
The maximum continuous operating voltage (MCOV) of the SPD must be 25%
above nominal system voltage for example, for use on a 240V AC (phaseneutral) system the SPD’s rated MCOV must exceed 300V AC.
2.3
The Maximum single withstand surge current, phase of the SPD is to be a
minimum of 140kA (8us rise time and 20us delay time to half peak amplitude),
including all fusing mechanism under this high current condition is not
permissible.
2.4
The complete SPD must be UL 1449 or equivalent, for 230/400V AC (phaseneutral) systems, the rated suppression voltage for the complete SPD is to be
800V or less.
2.5
The SPD must be modular in design, Surge protection circuitry, fusing
mechanisms and diagnostics are to be housed in a replaceable module,
discrete modules are to be housed in a replaceable module. Discrete modules
are to be employed for each phase. Each surge protection component within
a module is to be individually protected by thermal and short circuit fusing
mechanisms that disconnect should a fault occur.
2.6
The SPD must be Include full diagnostics, electrical (LEDs) and mechanical (a
flag visible through window status indications must be presented at the
module level. Remote status indication is to be available through be (or
voltage free) contacts which can be connected to a PLC/Building Automatic
System.
2.7
All surge carrying connections within the SPD are to be heavy duty bolted
connections. Wire less than 8/AWG (10mm2) or friction contacts for
replaceable modules are not to be used.
PART 2 OF P17
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
3.0 Distribution Switchboard Surge Protective Devices
3.1
The SPD’s shall be listed to UL 1449 or equivalent, having a maximum
continuous operating voltage greater than 15% or25% above nominal system
voltage, have a maximum single withstand surge current of 25kA, or higher,
per phase and have a UL suppression voltage of 800V or less for 240V AC
system. Status indication shall provide on the nit to shoe operational
readiness.
3.2
Performance of these surge protective devices are to be coordinated with the
main switchboard.
4.0 Surge Protective Devices For data-Communication Lines
4.1 SPD’s for data lines shall have aa maximum surge capacity of 10kA per line, less
than 3dB signal attenuation at 5 times the maximum data bit (or baud) rate, have
a let-through voltage appropriate for the susceptibility of the interface and a
maximum continuous operating voltage 25% above the peak signal voltage 25%
above the peak signal voltage.
5.0 Protection Mode for SPD
5.1
The SPD shall be installed to protect the line-ground (L.G), line –neural (L-N)
and Neural-ground (N.G).
5.2
Warning indication shall be provided for high neutral to ground voltage to be
able for identification any potential wiring fault condition which exist within the
facility.
6.0 Test
6.1
All test result for relevant testing authorities shall be submitted for approva.
6.2
All test shall be carried out according the approved standard and to the
satisfaction of the superintending officer.
7.0 level
7.1 All labels shall be clearly shown at the side of the devices.
Part E - Earthing System
1.0 General
PART 2 OF P18
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.1 A complete Earthing System comprises copper tapes, earth electrodes and warty
connections necessary for effective and permanently bonding to earth the noncurrent carrying metal work of all ancillary apparatus are described below.
1.2 Earthing tapes shall be of copper and shall be run u approved positions and fixed
in approved manner using saddles of appropriate size for securing tapes at
interval not exceeding one meter. Tapes shall be supplied in continuous
unbroken lengths, as far as practicable, to avoid unnecessary jointing.
1.3 Mating surfaces of all tapes at joints, etc., shall be tinned, riveted and soldered.
Joints in exposed sections that be protected against corrosion and ingress by the
application of at least two coats of approved non-corrosion paint.
1.4 Earth connection for all sections of the electrical works shall be bonded together
and shall be solidly and effective earthed.
1.5 Connections to electrical apparatus shall be made by a bolted connection in a
visible and accessible position. Consideration shall be given so that dissimilar
and incompatible imeals are not directly in contact but have a high conductivity
barrier between them.
1.6 All exposed metal parts including metal ceilings, handrail in staircases, metal
door, metal gate, balcony railing.
1.7 The earthing system includes measuring, marking off. Cutting, fitting, erection,
testing, supply for necessary tools and materials for fixing, jointing, etc., including
consumable stores.
1.8 The earthing installation shall be carried out in accordance with Singapore
Standard CP 5:1998 Code of Practice for Electrical installations and SS51:2009
Code of Practice for Earthing or the latest edition.
2.0 Earthing
2.1 Earth termination shall be approved of hard drawn copper rods. The minimum
diameter of the rod shall not be less than 16 mm and in any circumstance, it shall
be so sized that it can be driven into the soil without or deforming the rod. Where
two or more electrodes are driven into the ground to forma group which may be a
grid, the heads of the electrodes in the group shall be bonded to each other by
means of copper tapes of minimum cross section 25mmx3mm laid in the ground
at a depth of at least 500mm.
2.2 If the earth resistance of less than 1 ohm cannot be achieved, then separate
addition earth termination with earth electrode and inspection chamber
connected to the down conductor shall be provided.
PART 2 OF P19
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
2.3 The distance between the electrodes shall be at least twice their driven length,
Precast reinforced concrete inspection chamber complete with labelling shall be
provided under this Contract for inspection, testing, and maintenance purposes.
2.4 All electrodes shall be inter-connected together to form a complete earth
termination system by means of 25mmx3mm copper tapes or stranded bare
copper conductors of 70mm2. These conductors shall be endorsed in PVC
sleeve or pipe laid at minimum depth of 500mm below the surface. The
connecting conductions shall be run in direct lines between the rods.
3.0 Earthing of Exposed Conductive Parts
3.1 All exposed conductive parts of electrical parts of electrical equipment should be
connected by means of circuit protective conductors to the earth terminal/earth bar
and further connected to earth electrode(s) via earthing conductors.
3.2 Exposed conductive parts include:
a) Metallic enclosure of current using equipment.
b) Metallic conduit, trunking and ducting for enclosure of cables.
c) Metallic enclosures of current distribution equipment such as switchgear and
control gear assemblies.
4.0 Equip- potential Bonding
4.1 Main equip-potential bonding conductors should be connected to the main earth
bar for all extraneous conductive parts to create an equip-potential zone; such
conductive parts include.
a) Main water pipes
b) Gas service pipes and ducting
c) Other service pipes and ducting
d) Riser and ducting of central a/c system
e) Exposed metallic parts of structural framework
5.0 Supplementary Bonding
PART 2 OF P20
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.1 Local supplementary bonding connections should be made to metal parts, where
those parts are;
(i) Extraneous conductive parts.
(ii) Simultaneously accessible with exposed conductive parts or other
extraneous conductive parts. Normally, a separation of not more than 2m
is considered to be simultaneously accessible.
(iii) Not electrically connected to the main equipotential bonding by
Permanente metal –to metal joints of negligible impendence.
6.0 Earth Leads
6.1 The minimum size of the earth leads shall comply with those specified in the
current edition of the SS551:2009, unless otherwise specified in this section.
6.2 All earth leads shall be copper conductors of the appropriate cross section.
7.0 Earth value
7.1 The Tender Price shall be deemed to include all necessary equipment,
instruments, material labour, transportation, etc. connection with the system of
earthing point and inter-connections thereof to obtain the required earth
resistance value of less than ONE ohm. Contractor is therefore well advised to
conduct earth resistivity tests at site before submitting the Tender.
SECTION 2
FIRE PROTECTION SYSTEM
1.0
General Scope of works
1.1
The work to be performed under this Contract consists of the Supply,
Delivery, Installation, Testing, commissioning and free Maintenance and
Warranty during the Defect Liability Period of the Installation, which shall
comprise of the following systems and equipment which are further described
in other sections of this Specification:
a) Automatic Fire Sprinkler System
b) Fire Hose Reel System
c) Fire Extinguishers
PART 2 OF P21
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
d) Automatic Fire Alarm System
e) One Way Emergency Voice Communication System
1.2
The Contractor undertaking this installation shall be a BCA registered
Specialist under ME06 Fire Prevention and Protection Systems work head,
skilled and competent in the design, supply, delivery and installation of the
system The Specialist shall also supervise the testing and commissioning of
the system.
2.0 Statutory Regulations, By-laws, PSB Approvals
2.1
The works and all plant, equipment and materials forming part of this Contract
shall comply in all respect with any relevant Statutory Regulation, By-laws and
other Regulations currently in force. In addition, current Rules and
Requirements of the following bodies (the latest edition) shall be complied
with:
a)
b)
c)
d)
e)
f)
The Public Utilities Board i.e., The Public Utilities Act, The Electricity
Regulation, The Public Utilities (Electricity Supply) Regulation.
The Ministry of the Environment, i.e., The Water Pollution Control and
Drainage Act, Environment Public Health Act and Regulations.
Building and Construction Authority
The ministry of Labour, i.e., the factories Act.
Fire Safety and Shelter Department (FSSD) and Code Practice (CP) for
Fire Precautions in Buildings 2007.
The code of Practice and their latest amendments CP5: 1998, CP10:2005,
SS553:2004, SS530:2006, SS546:2009, CP29:1998, CP51:2004,
CP52:2004.All other Authorities having jurisdiction over the installation of
equipment and carrying out this contract works in the locality.
2.2
The Contractor shall obtain and complete all notice required by the above
Authorities as necessary and shall obtain all consents necessary for the
various work to be executed and shall be pay all fees in connection therewith.
2.3
The work shall also be carried out strictly in accordance with the current
edition of all applicable British Standards or other National Standards
acceptable to the S.O. All electrical installations and materials supplied shall
comply with Singapore Standard CP 5, Code of Practice for Electrical
Installations and to be approved by Power Grid.
2.4
All Codes, Acts, Standards and regulations shall be the latest published
edition unless otherwise state.
2.5
Where discrepancy arises, the provision in the Singapore Standards shall
take precedence on all matters relating to the works.
PART 2 OF P22
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
2.6
The Contractor shall bear the cost for all necessary arrangement to obtain
approval for fittings, values, expansion joints, equipment and materials from
the relevant authority if required.
3.0
Permit and Fees
The Contractor shall procure all permits and pay all fees and charges incurred
in connection with this Contract.
4.0
The Specification
4.1
This Specification is intended to set out in general outline the minimum
requirements and standards of installation for the various units of equipment
and works it covers. Provision set out, or claim made in the successful Tender
which are in excess of, or improved upon the basic requirements of the
Specification shall unless otherwise determined by the Superintendent Officer
(S.O) become part of the requirements of the Specification whether or not
they are subsequently incorporated in addenda to the Specification.
4.2
The S.O shall be judge of what constitute an improvement upon or exceeds
the requirements of the Specification.
5.0
Materials and Workmanship
5.1
Unless expressly stated to the contrary, all materials, and equipment supplied
by the Contractor shall comply with the applicable Singapore standards (S.S)
or British standard (B.S) specifications approved by the S.O.
5.2
Where a standard is referred to, that standard shall be the latest published
edition thereof, unless otherwise stated.
5.3
All materials and equipment supplies shall be new and of the best type for
each particular purpose and of the quality with regard to design, manufacture
and performance.
5.4
The equipment and materials shall be suitably designed and constructed for
safe, proper and continuous operation under all conditions described or
implied in this Specification without undue heat, strain, vibration, corrosion or
other operating difficulties.
5.5
Unless otherwise specified, the equipment and material within the scope of
this shall be of a standard proven design. Design incorporating components
which may be considered prototype in nature will not be accepted.
PART 2 OF P23
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.6
Equipment and equipment components shall be designed and supported to
permit free expansion and contraction without causing excessive, distortion or
leakage.
5.7
Parts subject to wear, corrosion or other deterioration, or requiring
adjustment, inspection or repair shall be accessible and capable of
reasonably convenient removal. Replacement and repair. All such parts shall
be of suitable material for keeping maintenance to a minimum.
5.8
The equipment shall be designed to permit replacement of parts and ease of
access during inspection, maintenance and repair.
5.9
Vibration, noise, mechanical and thermal stresses and susceptibility to
corrosion and erosion shall not be greater than with similar plant of first class
design and workmanship operating under similar conditions.
5.10
All works shall be carried out in accordance with the best engineering practice
by experience tradesmen of appropriate grades to the approval of the S.O.
5.11
Where disagreement occur between the Drawings and the Specification or
within either document itself, the item or arrangement of better quality, greater
quantities, or higher cost shall be deemed to be included in this Contract.
6.0
Shop Drawings
6.1
The Contractor shall immediately upon the award of the Contract prepare and
submit to the S.O for approval all plant and equipment layout drawings
showing full details within two (2) weeks. Detailed calculations shall be submit
where applicable. All equipment and materials proposed shall be submitted
for approval.
6.2
Shop drawing shall cover complete details for the following but not limited to;
a) Operation loading of all items of plant, equipment and accessories.
b) Dimensions of all items of plant, equipment and accessories.
c) Layout, showing all clearances for operating and servicing and in sufficient
details to ensure that the provision made shall be adequate and satisfactory.
6.3
Legend for all symbols shall be shown on every drawing.
6.4
Five (5) copies of each drawing shall be submitted for approval not later than
two (2) weeks after award of the Contract. Drawings with inadequate details
and not conforming to the requirements as stated above will not be
considered.
6.5
Upon approval of the drawing, the Contractor shall deliver four (4) copies of
each approved drawing to the S.O. for the purpose of Contract administration.
PART 2 OF P24
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
6.6
The drawing shall be submitted in ample time for review and approval by the
S.O. and no work shall be carried out until such a drawings are approved.
6.7
It is the onus of the Contractor to ensure that his drawings conform to the
requirements of the Specification and that they are approved by S.O. early.
6.8
Inspection of shop and working drawing is not to be considered as a
guarantee of measurements or building conditions. Where drawing are
inspected and approved by the S.O. such approval does not in any way
relieve the Contractor from his responsibility not from the necessity of
furnishing material or performing work required by the Specification.
6.9
Schedule of submission of shop drawings shall be submitted for approval not
later than two (2) weeks after award of the Contract.
7.0
Metrification
7.1
All gauges and indicators shall be provided with scales marked in SI Units as
well as in relevant Imperial units.
8.0
Samples
8.1
The Contractor shall submit the Samples below but not limited for the limited
to the following for approval:









Sprinkler Heads
Sprinkler Flow Nozzles
Fire Hose Reel Nozzles
Fire Detectors
Manual Call Points
Alarms Bells
Fireman Intercom Handset and Cabinets
Fire Extinguisher Cabinets
Isolators
9.0
Jointing of Pipes
9.1
The method of jointing for the various pipes shall be as described hereafter in
the appropriate sections of the specification.
9.2
Where differential movement may occur between two sections of a system or
where excessive expansion and contraction may take place, flexible
connections shall be used.
PART 2 OF P25
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
9.3
Flexible connections shall be of stainless steel bellow type to suit the duty and
temperature requirement of the fluid conveyed in the pipe. They shall be
complete with restraining tie-rods and shall be of approved make.
9.4
Adequate numbers of flanged or unison connections shall be provide
especially in plant rooms, service ducts and adjacent to fixtures so as to
facilitate removal of the pipe and equipment for inspection or repair.
9.5
Where pipes cannot be joined by standard fittings they shall be jointed using
mechanical coupling system.
10.0
Electrical Works
10.1
Electrical supply sub-circuits to pumps and other equipment terminating with
appropriate isolators near to control panels, the control panels being provided
by the Fore protection Contractor.
10.2
Switched socket outlet next to equipment unless otherwise specified.
11.0 Co-ordination or work
11.1
The Contractor shall check and ensure that all equipment provided is suitable
for the space allowed. The Contractor shall, if necessary, locate the
equipment before the erection of the walls and doors. All abortive work arising
from failure to comply with the above shall be paid for by the Contractor.
11.2
The Contractor shall be responsible for the proper and accurate setting out of
his work. He shall furnish all necessary information on the installation to the
S.O and the User for work co-ordination purposes. The Contractor shall also
obtain information on routes of other services form the User for work coordination purposes. The Contractor shall also obtain information on routes of
other services from the User before commencing any works to any floor of the
building. He shall so-operate with the User and all other Contractor on the job
and his work shall be suitably preplanned to ensure proper co-ordination with
other Contractors.
11.3
The Contractor shall inform and check with the User on all building works
(Such as holes, opening, grooves, required on floors, walls, etc) that are
required to be done as early as early as possible in order that holes, opening,
etc, may be formed as the building work proceeds. Should the Contractor
neglect to give the User reasonable notice and full particulars of any building
works required to be done, and there by resulted in delay or additional
expense to be incurred by the User, the Contractor shall be required to
indemnify the User against all charges or additional expense incurred in
respect thereof.
PART 2 OF P26
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
11.4
The Contractor shall be held solely responsible for making necessary
arrangements and/or co-ordinating with all relevant authorities, specialists,
other Contractors, etc, ensure satisfactory completion of this Contract such as
TOP,CSC.etc.
11.5
The Contractor shall inform the S.O of any discrepancies in construction
details installed on site (e.g. Pipe size, etc.) as compared with “approval”
drawing owing to unforeseen site conditions. The Contractor shall bear the full
cost of rectification if the failure to comply with the above clause leads to a
malfunction of the system.
12.0 Testing
12.1
The Contractor shall allow in his Tender price for the cost of all acceptance
tests required as hereinafter specified or as required by the authorities having
jurisdiction over the installation.
12.2
Costs of all water and electricity (temporary or permanent supply) used
during the testing and commissioning of the systems in this Contract shall be
borne by the User including the supply, installation and dismantling of
necessary pipework meters and associated works.
12.3
All pipework which are to be encased or concealed shall be tested and
approved before they are finally enclosed.
12.4
The Contractor shall give the S.O seven (7) days’ notice of his readiness to
carry out acceptance test and shall submit for his approval a complete and
detailed schedule of his tests to be carried out.
12.5
Before the commencement of acceptance tests, the Contractor shall have
brought the installation to a state of practical completion and shall have
completed all of his preliminary testing and adjusted the equipment to its
proper running order.
12.6
During the testing period, no modifications, adjustment or other work on the
installation shall be carried out without the permission of the S.O Should there
be any contravention of this requirement, the results of this requirement, the
results of all tests completed may be rejected and a retest ordered.
12.7
No acceptance test shall be carried out except in the presence of the S.O or
the representative appointed or the purpose.
12.8
Should the installation fail to perform in accordance with the requirements of
the Specification and/or authorities, the S.O may reject the whole or any part
of it.
12.9
The testing period shall form part of the Contract period and on extension of
the time will be granted by reasons of any extension of the testing period to
permit rectification, modification, adjustment or retesting of the installation
PART 2 OF P27
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
except where testing has been delayed or retesting has been necessitated by
circumstances beyond the control of the Contractor.
13.0
Certification by Contractor
13.1
On completion of all performance testing as required in the Specification, the
Contractor shall be required to submit all test reports to the S.O for approval
prior to acceptance of the installation. The Contractor shall also be required to
certify in writing to the S.O. that the installation is compliance with the
requirements of Specification and the Codes to which they are to which they
are designed by a Professional Engineer/Licensed Electrical Worker.
13.2
The Contractor shall engage his own Professional Engineer (PE) to endorse
and submit four (4) sets of the original ‘Certificate of Supervision’ and drawing
for the respective installation works one (1) month before system handing
over date. All tests and inspections required by the relevant authorities for his
installation works for obtaining of TFP/TOP/CSC of the building shall be
carried out by the Contractor. The Contractor’s PE Shall be present during the
TFP/TOP/CSC inspection.
13.3
The Contractor is to note that his Tender Price shall deem to include all
testing requirements.
13.4
The Certification of Practical Completion will not be issued unless the clauses
as stated above are complied with to the satisfaction of the S.O.
14.0
Operation and Maintenance
14.1
The Contractor shall train the User’s operation and maintenance of the plants.
15.0
Maintenance and Guarantee
15.1
The whole of the work to be performed under the Contract shall be completed
and left in running order to the satisfaction of the S.O
15.2
The performance of the whole installation shall be guaranteed to conform to
the requirements of this Specification. The Contractor shall, without additional
charge replace any works which prove faulty from workmanship or materials
and fully maintain the whole installation for a period of twelve (12) months
after the commencement of the Defects Liability Period.
15.3
The Defects Liability Period shall commence from the date of issuing the
Certification of Practical Completion.
15.4
During the Defects Liability Period shall be responsible for all costs involved in
balancing, setting and adjustment of controls, and supplying, during the period
PART 2 OF P28
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Appendix C, Annex A1
SECTION 1 TO 9
stipulated, all test equipment and instruments deemed necessary by the S.O.
During the Defected Liability period, the Sub- Contractor shall also carry out
the maintenance work as shown in the Schedules.
16.0 Quality Assurance
16.1
The Contractor shall establish, document and maintain a quality system to
demonstrate his commitment to quality in construction. As far as possible, the
quality system shall be formulated in accordance with the latest requirements
of SS 308:
Part 2- Specification for Quality Assurance in Production and Installation.
16.2
Specifically, the Contractor shall plan, establish, implement and maintain a
project quality plan setting out, as a minimum, the following:
a)
b)
The quality objectives to be attained.
the specific allocation of responsibilities and authority during the different
phases of the project:
the specific quality procedures, methods and work instructions to be applied,
including detailed procedures for each of the major work activities:
suitable testing, inspection, examination and audit programmers at the
appropriate stages:
a method of changes and modifications in a quality plan as the project
proceeds: and
Other measures necessary to meet the objectives.
c)
d)
e)
f)
16.3
The Contractor’s project quality plan shall be documented in the form of a
project quality manual and project operating procedures which shall be
submitted to the S.O within fourteen (14) days from the date of letter of
acceptance of tender. The quality control procedures shall be submitted at
least seven (7) days before the commencement of the activity.
16.4
Four (4) copies of the project quality manual and project operating procedures
shall be submitted to the S.O.A further copy shall be retained on the site.
16.5
Any comment, advice or acceptance of the project quality plan by the S.O.
shall not, in any way, alter or diminish the Contractor’s obligations under the
Contract of r the quality of the Work.
16.6
The Contractor shall adequately price for the above provision in the
Preliminaries.
16.7
Every specification should have an indication that it is the end of the
specification “END OF SECTION ONE”
Section B - Fire Hose Reel System
PART 2 OF P29
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.0
General
1.1 This section covers the supply, delivery, installation, testing, commissioning
and maintenance and warranty of the Fore Hose Reel System. The water
connection shall be from the supply pipe and is to be provided with outlet
connections, valves, etc.
1.2 The whole of the works covered by this section of the Specification shall be
carried out strictly in compliance with the latest edition of an amendment of the
following:
a)
Singapore Standard 575: 1998 Code of Practice for Fire Hydrant Systems and
Hose Reels;
b)
Rules and Regulations of the Building Construction Authority (BCA), the Fire
Safety and Shelter Department (FSSD) and Productivity and Standards Board
(PSB):
c)
d)
Singapore Standard CP 48: 2005 Code of Practice for Water Services:
All other authorities having jurisdiction over the installation and the carrying out
of this contract works in the locality.
2.0 Materials for Installation
2.1
The complete system pipe work shall be carried out in medium grade
galvanised screwed steel pipes conforming
to EN 10255;2004 with
galvanised wrought steel fittings conforming to EN 10255:2004 with
galvanised wrought steel fittings conforming to BS 1740.
2.2
All fixings, hangers, brackets, etc, shall be of hot dipped galvanised steel.
Details of all pipe fixings shall be shown in the Drawing. Spacing of fixing shall
not exceed the following:
Size of Pipe (mm)
Vertical
Interval for Horizontal
Interval
Run in meter
Run in meter
Up to 40
1.2 m
1.2 m
50
1.8 m
1.8 m
75
2.0 m
2.0 m
for
2.3 All fittings supplied and installed for the hose reel system shall conform to the
following.
a) Hose reels for fixed installation : BS5274
b) Hoses for fire-fighting purposes : BS 3169
c) Ball Valves up to 50 mm
: BS 1212
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PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
d) Stop valves up to 50 mm
: BS 1010
e) Gate valves above 50 mm
: BS 5163
f) Check Valves
: BS 5153 (M)
g) Pressure gauges
: BS 1780
3.0
Hose Reels
3.1
The hose reel shall be of swing, exposed or recessed type as indicated in the
Drawings. Each hose reel shall have a length of 30 m and a bore of 25 mm
unless indicated otherwise, and shall be made of non=kinking reinforced
rubber hose complying to BS 3169 terminating with “shut off” type nozzle and
fitted with 25 mm screw down stop valve at the inlet conforming to BS 1010.
Hose reels should be operation at a working pressure up to 6 bars.
3.2
The hose reel shall be type tested by a recognised testing laboratory to meet
EN671-1 and shall be inspected under PSB inspection scheme. It shall be
provided with PSB labels.
3.3
Particular care should be exercised when fixing and position recessed swing
type hose reels so that they can swing in and out freely and easily form their
normal position to operating position.
3.4
The nozzle shall be capable of giving a cone shaped spray pattern and a jet
type pattern.
4.0
Flow Rate and Pressure Requirement
4.1
As a minimum, the water supply to hose reels shall be such that when two (2)
topmost hose reels with the least hydraulic head in a building are operating
simultaneously, each will provide a jet of at least 10m in length at a flow rate
of minimum 0.4 I/S and a minimum running pressure of 2 bar shall be required
at the entry to each hose reel for a 6mm nozzle and a minimum running
pressure of 6 bar shall be required at the entry to each hose reel for a 6mm
nozzle and a minimum running pressure of 6 bar shall be required at the entry
to each hose reel for 4mm nozzle.
5.0
Water Supply
5.1
The water supply shall be taken from the appropriate storage tank, the tanks
shall be provided with all associated alarm and level controls, valves, pipe
work etc.
PART 2 OF P31
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
6.0
Hose Reel Notices
6.1
Operating instructions shall be affixed to the wall in a prominent position
adjacent to the reel.
6.2
Hose reels located in recesses or cabinets shall bear the words Fire Hose
Reel on the door in red letters at least 50 mm high on a while background.
6.3
All notices shall be prominently displayed and they shall not be unreasonably
affected by weathering or by corrosion caused by industrial processes in the
vicinity. The Contractor is to submit details of the notices for the approval of
the S.O prior to installation.
7.0
Painting
7.1
All pipe work shall be painted as per the section on ‘Painting’
8.0
Maintenance
8.1
Hose reels shall be subjected to regular inspection to ensure that the inlet
valve, the automatic on/off (if any), glands, tubing and shut off nozzle is not
choked.
8.2
Some nozzle, in addition to giving a jet stream, are also capable of producing
a cone spray. In these cases, the correct function of each role shall be
checked.
8.3
The booster pumps and associated mechanical and electrical shall be
checked monthly for their proper functioning as required in the Specification.
8.4
Before the DLP expired and once a year (annual), the hose shall be
completely run out and subject to operational water pressure to ensure that
the hose is in good condition and that all coupling and that all couplings are
water-tight. A flow test shall be carried out to ensure that a water discharge of
at least 0.4 i/s can be achieved.
8.5
All defects shall be rectified in the shortest possible time to ensure that the
installed equipment is restored to a satisfactory condition in as short a time as
possible.
Section C - Fire Extinguishers
1.0
General
1.1
This section covers the supply, delivery, installation, and eighteen (18)
months free maintenance and warranty of the various types of fire
extinguisher.
PART 2 OF P32
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.2
The location, type and capacities of all fore extinguishers are as indicated in
the Architectural layout and or fire protection system Drawings.
1.3
All mounting brackets shall be of approved type suitable for the location where
they installed. The performance of all extinguishers shall be to the approval of
the applicable local authorities.
1.4
All fire extinguisher shall be Productivity Standards Board (PSB) approved
type and provided with PSB labels, to approved ratings and comply with SS
CP 55: 1991 and SS 232.
1.5
All fire extinguishers except within plant rooms shall be provided with a steel
cabinet complete with a thumb turn lock in a front glass panel enclosure. The
cabinet shall be manufactured from minimum (16 SWG) 1.6mm gauge
galvanised iron steel sheet using folded sections. It shall be spray painted
with a coat of anti-rust primer and two coats of enamel paint of colour to S.O’s
approval.
2.0
Construction
2.1
The construction of each extinguisher shall be such that it can be handled
easily and is simple to operate by any untrained personnel for extinguishing
isolated fires.
2.2
Each extinguisher shall consist of a sealed pressure charge with solid drawn
alloy steel body, a head assembly, discharge nozzle, and safety devices to
prevent accidental discharge.
2.3
The external of each extinguisher shall be painted red in accordance with BS
381C.
2.4
The necessary operating, maintenance and reloading instruction and date of
last service shall be clearly displayed permanently on the body.
3.0
CO2 Extinguishers
3.1
CO2 Extinguishers shall be manufactured to comply with BS 3326.
4.0
Dry Chemical Extinguisher
4.1
Dry powder chemical extinguishers shall be manufactured to comply with BS
3465.
Section D - Automatic Fire Alarm System
1.0
General
PART 2 OF P33
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
1.1
This section covers the supply, delivery, installation, testing, commissioning
and maintenance and warranty the entire Microprocessor- based Automatic
Individual Addressable Fire Alarm System.
1.2
The fire alarm system shall be designed and installed in accordance with the
latest edition of an amendment to Singapore Standard CP 10: 2005 and in full
compliances with the rules and regulation of the Building Control Division, Fire
Safety and Shelter Department (FSSD) and other relevant authorities.
1.3
Fire Alarm panel shall be type tested by a recognised testing laboratory to
meet SS CP10, BS EN54: Pt2 & 4 and BS 5869 and shall be inspected under
Productivity Standards Board (PSB) inspection scheme. It shall be provided
with PSB labels.
1.4
All equipment proposed to be used for this system shall have obtained
approval form the international recognised testing laboratories such UL, FM,
LPC, .i.e. equipment shall be listed. Two (2) copies of the relevant approval
certificates shall be submitted with the Tender.
1.5
All Main equipment and devices shall be produced by the same manufacturer.
This applies also to the detectors, control units and central data processing
equipment. System formed by equipment. System formed by equipment from
different manufacturers will not be accepted.
1.6
The Super intendant Office (S.O) shall be entitled when enquired to conduct
quality audit of the Contractor and/or Manufacturer’s premises to assess the
quality standard.
1.7
The installation shall include all necessary hardware and software for a
complete operable system in accordance with the requirements of this
specification.
1.8
Tenderers shall note that the Tender submitted must be based on the
requirements of the Specification and Drawings. Alternative offer will only be
considered if the basic tender offer is in full compliance with the requirements
of the tender drawings and specification. Any alternative offer submitted must
be supported by detail descriptions for clause comparison on compliance/non
–compliance with the requirements of the tender specification and the cost
implication for each deviated item. Any non-compliance to the requirements of
the tender specification and the cost implication for each deviated item. Any
non-compliance to the requirements of this clause may result in disqualifying
of the tender submitted.
1.9
The entire system shall be of microprocessor based for complete individual
addressing with peer to peer network capabilities. System applying any form
PART 2 OF P34
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
of master and slave central processing arrangement and not capable to
provide address to every point will not be accepted.
1.10
The entire fire alarm and detection system shall be designed as a peer to peer
network communication and processing system which allows the monitoring
and controlling of the entire system at the Fire Command Centre.
1.11
The system shall provide a peer to peer Backbone communication Network of
distribution intelligence that all devices such as Main Fire Alarm Panel (MAP),
sub Fire Alarm Panel (SAP), etc., which are connected on the network must
be able to operate autonomously (stand-alone) and failure of any one of the
network must be able to operate autonomously (stand-alone) and failure of
any one of the unit shall not affect the proper operation of the others.
2.0
Heat Detector
2.1
Heat Detector shall be listed and of electronic type for combined rate-of-rise
and fixed temperature response. It shall consist of two independent
thermistors, designed to automatically compensate changes in ambient
condition.
2.2
All electronic circuits must be solid state and hermetically sealed to prevent
the operation being impaired by dirt, dust or humidity.
2.3
The detector shall be protected against damage by reverse of polarity or faulty
wirings.
2.4
The response sensitivity of the heat detector shall be with response
temperature at 58 degree C or 10 degree C per minute rise for normal
application and 82 degree C or 10 degree C per minute rise for high
temperature application.
2.5
All heat detectors shall be suitable for direct connecting to the class A four
wires individual addressable loop.
2.6
All heat detectors shall be common and interchangeable to a common type of
base. Heat detector requiring manual setting of address will not be accepted.
2.7
The installation of heat detectors shall include all necessary conduits, wirings,
detector with individual addressable electronic module. All detectors shall be
mounted such that the sensing element is not less than 25mm and not more
than 600mm below the ceiling of floor slab.
PART 2 OF P35
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
2.8
The software shall be able to generate supervisory trouble condition at any
temperature value.
2.9
The detector shall operate reliable within the following specification:
Operating temperature range:
0 to +38°C
Relative humidity:
Above 90%
Operating voltage:
24 V DC nominal
Operating current:
150uA
Alarm current:
100mA
Protection category IEC
IP-43
Approval:
UL/FM/LPC
2.10
For detectors concealed within the false ceiling space, each detector shall be
provide with an auxiliary response (activation) indication light (LED) mounted
in a location where it is clearly visible.
3.0
Smoke Detectors
3.1
All smoke detectors shall be of photo-electric type, multi-sensor type or as
indicated in the drawings. All smoke detectors shall be of UL listed/ FM
approved.
3.2
All smoke detectors shall have the intelligence to process the analog signal in
the detector itself for automatic compensation of signal deviation caused by
contamination and aging means that the detector shall maintain its response
behaviour over a long period of time.
3.3
Any detector reaching the ‘DRIFT’ threshold shall automatically transmit a
signal to the control unit where the corresponding data is stored. Detector in
drift condition shall function normally and identifiable from the control unit
upon request.
3.4
A fault signal shall only be automatically indicated at the control unit when the
upper drift limit is reached at the detector.
PART 2 OF P36
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
3.5
The installation of the smoke detectors shall include all necessary conduit,
wiring, detector with individual addressable module.
3.6
All detectors shall be mounted such that the sensing element is not less than
25mm and not more than 600 mm below ceiling of floor slab.
3.7
Specially designed probe unit provided by others used for monitoring of air
conditioning and ventilation return ductwork in the AHU room, shall be
connected to the fire alarm system for monitoring. Addressable Zone Modules
shall be used to provide an address to the probe unit.
3.8
For detectors concealed within the false ceiling space, each detector shall be
provided with an auxiliary response (activation) indication light (LED) mounted
in a location where it is clearly visible.
3.9
Each smoke detector may be independently selected and be able to be alarm
verified. The alarm verification shall be programmable from 5 to 60 seconds
and the numbers of times that each detector has entered the verification cycle
can be made available.
3.10
Smoke detector sensitivity adjustment shall be provided in the system from
the keyboard of the terminal or system keyboard. The range shall be within
the allowed UL window.
3.11
A maintenance alert verification procedure shall be provided to analyse
detector responses over a period of time. Any smoke detector in the system
responses with a reading that is below or above normal limits, then the
system will enter the Trouble Mode and the particular detector will be
annunciated on the system display with the following message “Maintenance
required”.
4.0
Photoelectric Smoke Detector
4.1
The photoelectric smoke detector must exhibit uniform response behaviour in
course of time. The light source intensity shall automatically adjust to
compensate for possible effects of dirt and dust accumulation.
4.2
All electronic components shall be of Surface Mounted Device Technology
(SMD) and the entire circuitry must be hermetically sealed to prevent the
operation being impaired by dirt, dust or humidity.
4.3
The detector shall be protected against damage by reverse of polarity or faulty
wirings.
PART 2 OF P37
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.4
The response sensitivity shall be adjustable from the control panel. It shall be
possible to test the electrical sensitivities of the detector in the field by a
specially designed detector sensitivity tester produced by the same
manufacture.
4.5
The detector shall consist of a built-in barrier to prevent access of insects into
the sensor.
4.6
The activation of a detector shall be indicated by a flashing LED at the
detector base with sufficient brightness.
4.7
The detector shall consist of built-in protection against usual electrical
transients and electromagnetic interference.
4.8
The detectors shall be suitable for direct connecting to the class A four wires
individual addressable loop.
4.9
All detectors shall be common and interchangeable to a common type of
base. Smoke detector which requires manual setting of address will not be
accepted.
4.10
The detector shall be operate reliably within the following specification:
Operating temperature range:
4.11
-23C° to +75°C
Relative humidity:
Above 90%
Operating voltage:
24 V DC nominal
Operating current:
130uA
Alarm current:
100mA
Protection category IEC
IP-43
Approval:
UL/FM/LPC
Analog Multi sensor Detector (combination of optical/heat)
a) 8B.2.23.1. the detector shall be of solid state type, addressable with smoke
and heat sensing elements in one head.
b) 8B.2.23.2. it shall be capable of measuring the smoke level through optical
obstruction principle and with heat sensing done by the dual-thermistors for
fast response to measure the temperature.
c) 8B.2.23.3. the performance of this detector shall also complied with the clause
8B.2.21 and 8B2.22 in this section.
PART 2 OF P38
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.0
Detector Base
5.1
All detector shall fit into a common standard type base. Everyone base shall
have a built-in option allowing mechanical locking of the detector head to
prevent unauthorised removal or tampering.
5.2
Detector insertion and removal shall be by simple push-twist movement
through the use of an extended tool by one person at the floor level with the
detector mounting height up to 7 metre even with the mechanical locking
device activated.
5.3
The base shall be equipped with screw less terminals capable of securely
retaining wires up to 1.5sq.mm. The base shall be suitable for use in both
Class A and Class B wiring.
5.4
The base shall consist of an electronic module suitable for individual
addressable operation.
5.5
The electronic module shall be solid state and hermetically encapsulated to
protect it against exposure to dust, dirt, humidity, etc.
5.6
The electronic module shall have a built-in red LED which shall flash when the
detector is activated (Alarm). It shall allow connection of one additional remote
LED to indicate the activation of the detector installed in concealed space or
normally locked room at the remote easily accessible area.
5.7
The standard base shall consist of a sealing plate serve to prevent dirt, dust,
condensation or water from the conduit reaching the terminals or detector
contact points.
5.8
The standard base shall be supplied with a removable base cover to protect
the contact area during installation stage and to allow checking and
commissioning of the individual addressable loops before insertion of the
detectors. The dust cover shall be removable by the extended tool up to 7
meters from the floor level.
5.9
Special base assemblies from the same manufacturer shall be available for
special area or applications.
5.10
All individual addressable electronic module shall be identical which allows
interchange between bases. System which requires setting of the detector
address either at the detection or the base will not be accepted.
PART 2 OF P39
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.11
All electronic circuity contain in the base must be protected against usual
electrical transients and electromagnetic interference. Reverse in polarity or
faulty wiring shall not cause damage to the base electronic or the detector.
5.12
All detector’s base mounted on false ceiling shall be provided with a hot
dipped galvanised iron ‘knock-out’ metal box complete with copper coupling
and bush for proper securing of flexible conduit.
5.13
The base could be of an electronic module but must be interchangeable with
all type of detectors.
6.0
Manual Call Point
6.1
Manual call point shall be provided at the position as indicated in the
drawings.
6.2
All the manual call point shall be of individual addressable type suitable for
direct connection to the class A individual addressable loop.
6.3
The manual call point shall be red in colour and consists of a built-in red LED
which flashes in case of activation.
6.4
It shall be able to test for alarm at the manual call point without opening the
call point cover or breaking the glass.
6.5
The alarm shall be activated by breaking the glass without the need of an
additional instrument (e.g. hummer). The glass plate shall be designed in a
way to prevent injuries when struck by the user.
7.0
Alarm Bells
7.1
Alarm bell shall be suitable for 24 VDC operation with steel gong of minimum
150mm dia. The operating part of the bell shall be covered by aluminium die
cast housing.
7.2
All bell circus shall be monitored for open and short circuit fault.
7.3
Independent alarm bell circuit shall be provided for each floor. The same
alarm bell circuit shall not be used for connecting alarm bells on the other
floor.
PART 2 OF P40
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
7.4
The sounding of bell shall be on original alarm basis. However, provision shall
be included for selective automatic bell sounding organisation. (I.e. sounding
of bells at the affected floor, two floors above and one floor below) In addition,
manual push button shall be provided for each bell circuit at the Fire
Command Centre for manual activation of bells.
8.0 Sub Fire Alarm Panel (SAP)
8.1
The SAP shall be micro-processor based and control by the program
contained in non-volatile memory.
8.2
It shall be of modular design by means of plug-in cards to allow ease of
maintenance and future system expansion.
8.3
The SAP shall be suitable for use in individual addressable system with
possibilities to integrate minimum of eight (8) collective (conventional) zones
which operate independently with the individual addressable loops. The
integration of additional collective zones shall not involve changes in the
existing modules except adding the collective zone module.
8.4
All sensing devices such as detectors , manual call points etc., shall be
connected along the Class A addressable loop regardless of the number of
zones which shall be formed by programming at the SAP. The number of
devices connected to an addressing loop shall not be more than 75% of the
loop capacity and the same addressable loop shall not be used for more than
one floor.
8.5
A floor mimic board shall be provided with each SAP. The floor mimic board
shall consist of prespex silk screen floor plan with built-in red LEDs for zone
alarm indications. A minimum of five colours (excluding white and black) shall
be provided.
8.6
The following indications shall be provided at each SAP. All system shall be
display by LCD in plain text. The signals to be displayed includes:
-
-
Current day, month, year and time
Current status summary for:
Number of alarm remains in system
Number of fault remaining in system
Number of zone isolated
Number of zone in test mode
Display of zone and point fault condition with 40 characters space for
description of zone location and 40 characters space for description of
point location.
Display of alarm signal with 40 characters space for description of zone
location and 40 characters space for description of point location.
PART 2 OF P41
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
-
Display of guided text for system programming functions.
The characters display on the LCD shall be in black with background
colour in YELLOW for all signals except for alarm signal which shall
have the background colour in RED.
8.7 The following control functions shall be provided for each SAP.




Alarm acknowledge button
Alarm reset button
Function buttons for recall details of current status
Key-pad for the following functions:
- To perform lamp test
- To isolate entire zone
- To isolate a point within zone
- To switch zone in test mode
8.8 The following master LED indications shall also be provided:
-
‘System On’ with green LED
‘Fault’ in yellow LED or amber LED
‘Detector Test’ in yellow LED or amber LED
9.0
Power Supply
9.1
The system Terminals shall be able to operate on mains power supply of 230
V AC, -15% to +10% with 48 to 62 Hz.
9.2
The power shall contain suitable over-voltage protection to prevent any
malfunction or damage due to power line surges.
9.3
The power supply for all MAP/SAPs shall be equipped with stand-by battery of
nominal voltage of 24 V DC. The battery and battery charger shall be sized up
and supplied strictly in accordance with the requirements of CP 10:1993. The
Contractor shall submit detailed calculations to justify the capacity of the
batteries and the battery charger for the S.O.’s approval.
9.4
Upon loss of mains power, the power supply unit shall automatically revert to
battery power to maintain the operational condition of the system.
9.5
When the battery voltage drops below 20 V DC, a fault signal shall be
generated and be indicated on the affected unit as well as the Main System
Terminal in the FCC/BAS Room and duplicate system terminal.
9.6
When the AC power is restored, the power unit shall automatically revert to
normal operation without any manual restoring procedure.
9.7
The stand-by batteries shall automatically be maintained in charged condition
by a built-in short circuit proof charger.
PART 2 OF P42
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
9.8
The load shall automatically be switched off when the voltage drops below 19
V DC to protect battery cells from being damaged by complete discharge.
9.9
Gas-tight maintenance free lead-acid batteries shall be used for stand-by
power supply and shall have a minimum life cycle of three (3) years.
9.10
The power supply unit and charger circuit including all fuses shall be
supervised. Any malfunction or blown or missing fuse shall be indicated on
the affected unit as well as the Main System Terminal in the FCC/BAS Room
and the duplicate system terminal.
9.11
All Central Processing equipment such as the CPUs, monitors, computer,
operating consoles, printers, etc. in the FCC/BAS Room and the Central Fire
Command Centre shall be supplied and installed with the stand by power from
a UPS system for four (4) hours minimum. Each location shall be provided
with one UPS system.
10.0
Floor Mimic Board
10.1
The Contractor shall supply and installed floor mimic board on each floor next
to the MAP/SAPs as indicated in the drawings. The floor mimic board shall
either be a standalone type or incorporated into the panel subject to S.O.’s
approval.
10.2
The floor mimic board shall indicate the floor layout in pictorial manner and
consist of red “LED” for each zone to indicate the alarm status.
10.3
The signal transmission from System Terminal to the respective floor mimic
board shall be hardwired or multiplexed data line.
10.4
Upon alarm zone actuated, the corresponding “LED” on the floor mimic board
shall flash and built-in buzzer shall sound. The “LED” shall become steady
and buzzer shall be silenced after the alarm is acknowledged.
10.5
The size of the floor mimic board shall be of reasonable size with 6 mm thick
acrylic or Perspex sheet with indication of the layout of the floor, fire alarm
system with LED indicator, clearly engraved in silk screen printing in black
and minimum of 5 other colours. (Excluding black and white).
10.6
The design and construction of the floor mimic board shall be to the approval
of the S.O.
10.7
Lamp test function shall be provided for testing of all “LED” on the floor mimic
board.
11.0
Interfacing Unit
PART 2 OF P43
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
11.1
Interfacing unit shall be provided for monitoring of external contact signal such
as sprinkler flow switch and etc.
11.2
The interfacing unit of shall be of individual addressable type which can be
connected directly to the class A individual addressable loop.
11.3
The interfacing unit shall consist of a LED which shall flash upon receiving the
actuation signal from the external contact.
12.0
Cable Markers
12.1
Cable markers for the fire resistant cables (buried) shall be provided and
position on each change of direction and at 30m interval subjected to S.O.’s
approval.
13.0
DECAM TAS Line
13.1
The Contractor shall provide the required facilities at the Central MAP for
connection to a TELEPHONE direct “Private Wire” line so that in the event of
operation of the Fire Alarm System, a signal will be automatically transmitted
to the nearest Fire Service fire console via a monitoring company.
13.2
The Contractor shall make all necessary arrangement including applications,
paying all fees, etc., and commission the said facilities.
Section E- Emergency Voice Intercommunication system
1.0
General
1.1
The section covers the supply, delivery, installation, testing, commissioning
and eighteen (18) months free maintenance and warranty of the Emergency
Voice Intercommunication System.
1.2
The Emergency Voice Intercommunication System shall comply with latest
edition of SS 546 “Code of Practice for Emergency Voice Intercommunication
System in Building” and amendments, and Code of Practice for Fire
Precautions in Buildings 2013)
2.0
System Components
2.1
Vestibule Equipment
PART 2 OF P44
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
This consists of a master control console made of heavy sheet metal housing
vertically mounted panels that make up the master control.
The master control shall consist the following units as required:
a)
b)
c)
d)
2.2
A Master Handset Panel including Handset
Handset Selector/Annunciator Panel(s)
Common Trouble Audio and Visual Indicator Panel
Handset Supervisory Modules
Remote Equipment
Remote equipment shall consist of the following items:
a) Portable Handset (stored in vestibule panel)
b) Handset Jack
3.0
Specification
The Emergency Voice Intercommunication System shall provide handset
communication in accordance with the following Specification and shall
comply with SS546. Supervision, audible warning devices and auxiliary power
provision shall also be in accordance with the following Specification.
3.1
Vestibule Equipment
a) Master Handset Panel
The master handset Panel shall provide a handset which shall be moulded of
high-impact ABS plastic in signal red and equipped with retractable cord. It
shall be housed in a vertical-style all metal module which occupies one panel
space in the vestibule console. The electronic circuit board which is mounted
behind the hand set shall contain
1)
2)
3)
4)
Call Generator circuit
Communication circuits
Busy Tone Generator
Supervisory Circuits
b) Handset elector/Annunciator
Each selector/annunciator unit shall accommodate remote handset zones and
shall be equipped with push on/push off selector switches and LED”CALL”
annunciator and LED fault indicators and audible device in accordance with
the number of handset as shown in the Drawings.
Each selector/annunciator unit shall also provide plug-in facilities in
accordance with the number of handsets as shown in the drawing for the
supervisory module.
PART 2 OF P45
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
Depressing the corresponding selector switch shall illuminate the annunciator
LED continuously. Lifting the master handset shall silence the audible call
signal. Additional handset zones calling shall hear busy tone. A shorted, open
and grounded handset line shall be indicated by the corresponding fault
indicator LED and audible device A shorted line shall be automatically
excluded from selection. Handset line troubles shall also be from selection.
Handset line trouble shall also be summed and indicated by an LED
designated “HANDSETS” on the trouble indicator panel.
c) Line Supervisory
The handset line supervisory shall operate in conjunction with the handset
selector and master handset. Its function shall monitor the handset lines
connected to the terminals and shall issue signals according to line state,
further to enable handset zone selection.
d) Trouble Indicator Panel
The trouble indicator panel shall contain all the LED trouble indicator lamps
(amber), an incandescent general “TRUBLE” indicator, a “SYSTEM READY”
LED indicator (green), an audible device, a lamp- test push-button and a
“SILENCE” push-button.
Any individual trouble LED activation shall be summed to activate the
“TROUBLE” light and audible device.
All trouble indicator lamps and LED’s of the entire system shall be activated
by depression of the lamp- test button and extinguished by releasing the
button.
All audible devices throughout the system shall be silenced by momentary
depression of the “SILENCE” button.
The penal shall be of heavy metal sheet which occupies a vertical panel on
the vestibule console.
3.2
Remotely Located Equipment
a) Remote Handset
The remote handset shall be moulded of high-impact ABS plastic in SIGNAL
red, and equipped with a retractable cord.
The remote handset enclosure shall be constructed of heavy-gauge steel,
finished in red enamel with conduit knock-out at top and bottom.
The enclosure face plate shall be of red enamelled steel with a combination
breakglass/key operated door.
PART 2 OF P46
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
The end-of-line resistor shall be 10 kilo ohm per watt, mounded on the
terminal block on top of the handset base plate. Screw terminals shall be
provided for ease of installation.
b) Portable Handset
The portable handset shall be moulded of high impact ABS plastic in red and
equipped with a retractable cord and phone plug.
Five (5) sets of potable handset shall be provided.
c) Remote Handset Jack
The remote handset jack shall consist of a phone jack on a stainless steel
plate for mounting on a standard single gang electrical box.
4.0
Operations
4.1
The Supervised Emergency Voice Intercommunication System provides
fireman with two-way communication between remote points in the building
and the master control panel. Lifting of any remote handset, or the plugging in
of any remote portable handset is lifted the audible signal and flashes an
annunciator light on the master control panel. When the master handset is
lifted the audible panel is silences and depression of the appropriate selector
button switches off the adjacent flashing light.
4.2
Depression of the selector button(s) also established communication with the
remote telephone(s) selected. Intercepted tone (or busy signal) will be heard
at remote phones not selected by the master control panel.
4.3
Communication by telephone handset may be between the control location
and any one or more remote telephones, or between any numbers of remote
telephones, thus providing a telephone ‘Conference’ Communication network.
4.4
The entire system is under constant surveillance by electronic supervision.
System faults are indicated immediately at the control location. The control
panel signals indicated the type of fault and its location within the system,
providing rapid recognition of fault in the handset lines and emergency power
charging circuits.
5.0 Wiring
PART 2 OF P47
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.1
All wiring shall be fire rated conforming to the requirement of SS546 and shall
be installed in conduit/trunking.
6.0 Power Supply
6.1
The Emergency Voice Intercommunication System shall be supplied and
installed with emergency power supply/stand by power as per the
requirements of the relevant regulations.
SECTION 3
ONE WAY EMERGENCY VOICE COMMUNICATION SYSTEM
Section E - One Way Emergency Voice Communication System
1.0 General
1.1 This section of the Specification and the scope of works comprise the design,
supply, installation, testing and commissioning of the complete One way Emergency
Voice Communication system including microphones, preamplifiers amplifiers, racks,
supervisory panels, monitor panels, all necessary equipment and other necessary
associated accessories. The provision of all testing facilities shall also be included.
1.2 The following standards and regulations shall be complied with where applicable.
1.2.1 Latest edition of Singapore Standard CP 5 and SS 546:2009 and
and
1.2.2 Any other rules and regulations relating to public address equipment
installation as required by the local authorities.
2.0 Functional Specifications
PART 2 OF P48
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
2.1
The system shall be a one-way voice microprocessor based communication
system which is expandable with a maximum capacity of two hundred and
fifty-six (256) zones. The number of zones and the number of loudspeakers in
each zone shall be specified as shown in the drawings.
2.2
The system shall enable the operator to communicate with each zone via a
sensitive condenser microphone fixed at the console and from any of the
intercom station/phones. A cassette deck recorder, FM radio turner, digital
message recorder, compact disc player shall be provided and integrated into
the system such that it can provide background music or taped messages
through the network.
2.3
Microphone points when required shall be installed in a location determined
by the Architect / S.O.s. All microphone point shall be terminated with a high
quality XLR three pin connectors and shall be connected to the amplifier via
screened cables. Speeches and announcements can then be made over the
public address network via a heavy duty microphone plugged into one of
these points.
2.4
The following functions shall be included:
2.4.1 All zone call:
2.4.2 Emergency or paging override channels for all zone: and
2.4.3 Background music channels.
3.0 System Features
The control console of the public address system shall have the following features:
3.1 Call Station Console
The console must be easy to operate and shall be equipped with definable keys;
display indication and a switch to make announcements to all zones. Command keys
shall be available to assists the operator in the selection of a group of zones. In other
words, selection of, say, 30 zones will not require the depression of 30 keys but will
be made available through the use of a programmable switch. The control circuit
shall be capable of selecting two or more different groups.
3.2 Pre-announcement Tone
Every announcement made through the network shall be preceded by a pre
announcement tone.
3.3 Built-in Master Clock
PART 2 OF P49
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
A built-in Master Clock Bell Schedule for up to 550 events. Over ten unique tones
shall be provided to sound different areas and user programmable. It shall be
provided Secondary Clock correction.
3.4 All Call/ Emergency Paging Key
An emergency paging (or all call) key calls all zone when depressed via any
intercom stations / phones. This enables the principal to have easy access to all
zones should the need arises.
3.5 Siren
The console shall have the function of activation an emergency siren with special
feature(s) to prevent accidental alarm activation. Paging or announcement can be
made in the same time to reinforce the emergency of the siren.
4.0 Equipment
4.1 Ceiling Speakers
It shall meet the minimum requirements as follows:
4.1.1 Recess installation in false ceilings/panels:
4.1.2 Nominal power: 6W/20W
4.1.3 Frequency response: ~80Hz-18 kHz;
4.1.4 Sensitivity: >90dB/1m/1W @1kHz;
4.1.5 Angle of coverage: ~800
4.1.6 Dimensions (dia): ~200mm;
4.1.7 Isolation transformer: and
4.1.8 Multiple tap selection.
4.2 Box/Cabinet Ceiling Speakers
It shall meet the minimum requirements as follows:
4.2.1 Surface-mounted;
4.2.2 Nominal power: 3W/10W;
4.2.3 Frequency response: ~ 150Hz-20 kHz;
4.2.4 Sensitivity :> 90dB/1m/1W @ 1 kHz;
4.2.5 Angle of coverage: ~1700:
4.2.6 Isolation transformer: and
PART 2 OF P50
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.2.7 Multiple tap selection.
4.3 Power Amplifier
It shall meet the minimum requirements as follows:
4.3.1 Rates power output shall be of sufficient rating to drive all the
speakers;
4.3.2 Frequency response: ~ 20Hz- 20 kHz;
4.3.3 THD; <1% AT 1 kHz;
4.3.4 Cooling: Internal fan;
4.3.5 LED status indication:
4.3.6 Speaker output short circuit protection; and
4.3.7 Power requirement: 220-240V AC, 50/60Hz
4.4 Pre-amplifier
It shall meet the minimum requirements as follows:
4.4.1 Inputs & outputs: ~9 & 2 nos;
4.4.2 Each input with output selector:
4.4.3 Frequency response: ~20Hz – 20 kHz;
4.4.4 Priority setting;
4.4.5 LED status indication; and
4.4.6 Power requirement: 220-240V AC, 50/60Hz.
4.5 Line Supervisory Panel
It shall meet the minimum requirements as follows:
4.5.1 Independent circuit supervising up to 10 zones;
4.5.2 LED status indication for short/open/normal circuit;
4.5.3 Speaker output short circuit protection; and
4.5.4 Power requirement: 220-240V AC, 50/60Hz.
4.6 Amplifire Change-Over Panel
It shall meet the minimum requirements as follow:
4.6.1 To switch up to min. 5 power amplifiers with one spare amplifier:
4.6.2 LED status indication;
4.6.3 Speaker output short circuit protection: and
PART 2 OF P51
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.6.4 Power requirement: 220-240V AC, 50/60Hz.
4.7 Monitor Panel
It shall meet the minimum requirements as follows:
4.7.1 Independent circuit supervising up to 10 zones;
4.7.2 Built-in loudspeaker with volume control;
4.7.3 Graphic LCD display and level meter;
4.7.4 10-zone channel selector switch; and
4.7.5 Power requirement: 220-240V AC, 50/60Hz.
4.8 Receiver-mixer
It shall meet the minimum requirements as follows;
4.8.1 Audio output level adjuster;
4.8.2 Acoustic signal to precede microphone announcements;
4.8.3 Power requirement: 220-240V AC, 50/60Hz.
4.9 Paging Console
It shall meet the minimum requirements as follows;
4.9.1 Priority setting;
4.9.2 Unidirectional microphone;
4.9.3 Frequency response: ~20Hz-20 kHz: and
4.9.4 Power requirement: 220-240V AC, 50/60Hz.
4.10 Zones Decoder Module
It shall meet the minimum requirements as follows;
4.10.1 Switching unit;
4.10.2 Input & Outputs: ~2 & 8 nos;
4.10.3 Each output with input selector;
4.10.4 Frequency response: ~20Hz-20 kHz: and
4.10.5 Power requirement: 220-240V AC, 50/60Hz.
4.11 Digital Message Announcer
It shall meet the minimum requirements as follows;
4.11.1 Recording/playback messages;
PART 2 OF P52
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
4.11.2 Alarm button for transmitting an announcement with the maximum
priority;
4.11.3 Volume control for messages, siren, and monitor loudspeaker;
4.11.4 Frequency response: ~20Hz-20 kHz: and
4.11.5 Power requirement: 220-240V AC, 50/60Hz.
4.12 Equipment Rack
It shall meet the minimum requirements as follows;
4.12.1 Steel frame;
4.12.2 Ventilated top-cover, with exhaust fans on top;
4.12.3 Tempered glass front door with lock;
4.12.4 Steel side door with a lock and the ventilated grid;
4.12.5 Power supply outputs to each equipment
4.12.6 Sliding tray; and
4.12.7 Castor wheel & adjustable feet.
5.0 Disc Compact Player
5.1
It shall meet the minimum requirements as follows;
•
Multi-format playback: DVD-RAM/DVD±RW/DVD±R/DVD±R
VIDEO/SVCD/VCD/CD/CD-RW/MP3/WMA/JPEG/MPEG 4/DivX
•
Frequency response: ~20Hz-20 kHz;
•
Front metal door with lock;
•
Signal to noise ratio: >100 dB;
•
Total harmonic distortion: <1%
•
Power requirement: 220-240V AC, 50/60Hz.
5.2 Event Recorder
It shall meet the minimum requirements as follows;
5.2.1 Recording and playback facility;
5.2.2 Double cassette deck
5.2.3 Microphone input with level control
5.2.4 Headphone output; and
PART 2 OF P53
(DL)/DVD-
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
5.2.5 Power requirement: 220-240V AC, 50/60Hz.
5.3 FM Radio Tuner
It shall meet the minimum requirements as follows;
5.3.1 Tuning range: AM & FM;
5.3.2 Frequency response: ~ 30Hz – 15 kHz; and
5.3.3 Power requirement: 220-240V AC, 50/60Hz.
5.4 Speaker Cables
It shall meet the minimum requirements as follows;
5.4.1 AWG16 tinned copper twisted pair;
5.4.2 PVC insulated individually;
5.4.3 Overall PCV insulated jacket; and
5.4.4 Fire rated.
6.0
Surge Protection of Public Address System
6.1
The PA system shall be protected against lightning surge induced over
voltages in accordance to section 5.6 of AS 1768-1991.
6.2
All metal frames of the console shall be effectively earthed and the 230V
single phase power supply shall be protected by serge arrestors.
6.3
The signal circuits shall be protected by combination of gas discharge device,
visitors and Zener diodes. The multi-stage sure protector specially designed
for the purpose shall be suitable for the signalling protocols and of minimum
10kA surge capacity.
7.0
Testing and Commissioning (T&C)
7.1
General
7.1.1 The Contractor shall submit his proposed T&C procedures to
Architect/S.O.
For approval
7.1.2 All T&C carried out shall be witnessed by architect/ S.O;
7.1.3 The contractor shall provide all the necessary provision of labour,
specialists, materials, calibrated instruments for carrying out the T&C
work;
PART 2 OF P54
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
7.1.4 Upon completion of the installed works, the Contractor shall give due
advanced notice and provide details of date, time and list of T&C works
to Architect/ S.O. for approval;
7.1.5 Before carrying out any test, the Contractor shall ensure that the
installation complies with the specification requirement and function
well.
7.1.6 The Contractor shall record all commissioning results on record sheets
and submit to Architect/ S.O. for approval. On completion of
commissioning and prior to Final Inspections and Handover, submit
the commissioning results in
a bound ‘Operation and Maintenance
Manual’ in triplicate to the Architect/
S.O.s, who reserves the right
to witness such commissioning operations and procedures
as
necessary.
7.1.7 The Contractor shall provide and arrange training to Employer’s
operation and maintenance staff including all training facilities, material,
handouts and operation & maintenance manual etc;
7.1.8 The Contractor shall supply and install without additional cost to the
Employer, replacements for all and any equipment or parts thereof,
which may, in the opinion of the Architect/ S.O. s, become
unserviceable, in contract period.
7.2
Functional Performance Tests
The Contractor shall perform, but not limit to, the following tests upon
completion of the system:
and
7.2.1 Adjustment of the output levels of all pre-amplifiers, power amplifiers
etc;
7.2.2 Functional test of all equipment;
7.2.3 Functional check of the system under normal, emergency conditions
etc.
7.2.4 Check and adjust matching transformer tap setting and trimmer to limit
output level of speaker to not more than 3 watt at maximum volume
setting.
PART 2 OF P55
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
SECTION 4
1.0
FIRE COMMAND CENTRE
1.1
The Contractor has to create a FCC within the main office A Fire Command
Centre which is shall be of adequate size to house all the terminals and
supervisory/control equipment, etc. of the building’s fire protection/detection
systems and a free working space of at least 6m². All other equipment housed
in the FCC must comply with SCDF Chapter 8 Fire Command Centre and the
construction of enclosure, facilities and lighting of a Fire Command Centre
shall comply with the SS 546: Code of Practice for Emergency Voice
Communication Systems in Buildings.
SECTION 5
Section A:
1.0
Air-conditioning system
1.1
The design proposal and requirements contained herewith shall cover all
ACMV services and shall include supply, installation, commissioning and
maintenance of all equipment necessary to provide an efficient, safe and
satisfactory installation, taking into consideration of all Code of practices and
compliances to authorities for the ACMV works.
1.2
Within 2 weeks after award of the contract, contractor shall submit drawings
showing full details of all plant and equipment. Detailed calculations shall be
submitted where applicable.
Section B
2.0
High Volume Low Speed fans (HVLS Fans)
2.1
Contractor to submit the model, brand, capacity, no of the fans and other
information pertaining to the selection of HVLS fans to be installed in the
warehouse. The proposal shall come with PE calculation for the installation
method and the works should come with 36 months free maintenance
quarterly.
PART 2 OF P56
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
SECTION 6
BUILDING WORKS
Section A – Wall Finishes
1.
Material s shall be of the best quality and brought on to the site in the
manufacturer’s sealed containers and used strictly in accordance with the
manufacturer’s instructions.
2.
The priming, undercoats and finishing coats, together with sundry fillers,
topping, knotting etc. shall conform to British Standard Specifications and be
of type recommended by the manufacturers for the materials in close
proximity. All undercoats shall be from the same manufacture as the finishing
coat.
3.
On completion, all defective areas shall be touched-up and made good
cleaned and left in perfect condition to the satisfaction of the User.
4.
Colours of final coats shall be approved by the User.
5.
The number of coats specified is the minimum to be applied in normal
conditions. Further coats shall be applied as necessary, if in the opinion of the
designer, the coats have been incorrectly applied or the proper cover has not
been obtained.
6.
The contractor shall submit samples of all painting materials before
commencing work. All paint and paint products shall liable to chemical
analysis at the contractor’s expense and in all cases, samples taken from the
site shall conform to the samples submitted by the Contractor and approved
by the User.
7.
The contractor shall supply dust sheets protect all other surfaces against
discoloration splashes. All marks shall be cleaned from new and existing work
and completed work shall be to the User’s approval.
8.
Prices for painting shall include for preparation of surfaces as specified
providing samples, cleaning up of splashes off new and existing work,
protecting adjacent surfaces to areas to be painted and providing and
providing “wet Paint” notices.
9.
During the execution of the work, further samples of all or any of the materials
may be taken by User. Any work executed with material found on test not to
fulfil the requirements of the specification shall be burnt off or otherwise
removed and the work redone as directed by the User at the Contractor’s
expense.
PART 2 OF P57
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
10.
If any adulteration or substitution of interior and poor quality paints are found
in the works, the Contractor shall re-execute works for which this adulterated
painted is used.
11.
All painting and finishing works shall be executed to the satisfactions, any
work done by other instead shall be in this respect be paid by the contractor.
Any defects such as flaking, loss of gloss, development of fungus,
discoloration or powdering which shall appear in the painting work within the
defect liability period, commencing from the completion of the works shall
immediately be made good by the contractor at his own expense and to the
satisfaction of the User.
Section B – Dry Wall Partition
1.
All work shall be carried out by skilled tradesmen in a workmanlike
and in accordance with good trade practice.
2.
Where fire rated partitions are employed, they shall comply with current
Singapore Government Regulation and be PSB approval type. All materials
above the false ceiling shall be non-combustible on any stud wall, fire rated or
non-fire-rated.
3.
The contractor shall ascertain the acoustic requirements for partitions prior to
erection and shall vary the thickness and materials to achieve the required
STC rating.
4.
All corners shall be finished perfectly square and vertical.
5.
Insulation shall be carefully packed to fill up the space within the partition. All
insulation shall be non-combustible.
6.
Where partitions are instilled up to the soffit or down to floor slab, all openings
on the partitions above suspended false ceiling shall be properly sealed.
Neoprene seals shall be employed top and bottom continuously where there
is a required acoustic rating.
7.
Timber backing for fixing on joinery and electrical accessories shall be
provided. All wall hung items must include reinforcement adequate to the
load.
8.
The contractor shall fully comply with the manufacturer’s recommendation on
materials used and installation method. Rectification of defective installation
or replacement of materials not in accordance to the manufacture
specifications shall be the sole responsibility of the Contractor and at his own
cost.
PART 2 OF P58
manner
PART 2: GENERAL AND TECHNICAL SPECIFICATION
CT1603B012
Appendix C, Annex A1
SECTION 1 TO 9
SECTION 7
1.0
FIRE RATED ROLLER SHUTTER/SMOKE SHELTER
1.1
The fire resistance for the fire roller shutter should be 2 hour fire rated and
make of insulated type. The work should come with certificate of compliance
and PSB fire rated label.
1.2
The Smoke shelter should be made of non-combustible materials that could
withstand a temperature of 600 degree Celsius for at least half an hour. The
smoke shelter should install at the interface between AFT1 and AFT2 airside
with the use of suitable cladding frame work which hold the smoke shelter.
The installation should come with structural PE calculation for safety load.
PART 2 OF P59