The Scope
of Work
ACTIVITIES
7.1 LIGHT FIXTURES
INSTALLATION:
1) All
lighting circuits shall be installed with a maximum loading of 1800 Watts per
circuits.
2) The
only breaker size permitted to be used is 5, 10 And 15 Ampere.
3) When
contactor control is use for lighting circuits, loading may be increased to 7
KW per circuit.
4) Heat
resisting flexible cords of minimum size 1.5 mm2, this included
cords insulated with butyl rubber, EP, rubber, silicone rubber or glass fiber,
must be used for connection between the ceiling rose and lamp holders for
pendant type light fittings.
5) Where
batten lamp holders or enclosed lighting are used, the final connection shall
be made by heat resisting cables, or cable cores shall be individually
protected by sleeves of suitable heat resisting material e.g. silicon bonded
glass braiding.
6) LED
Light fittings shall be supported by direct support from the false ceiling
framework (Providing the Ceiling has been designed to withstand the Weight of
the Light Fittings).
7) When
using this method, it shall be possible to completely withdraw the light
fitting from the ceiling without damage to the ceiling or reducing its
rigidity.
8) Light
fittings shall be supported by chain support from the underside of the
structural supports.
9) Each
chain shall be secured to the structural support by means of a hook, and at the
light fitting, by an approved hook with threaded portion to allow for levelling
of the light fitting.
7.2 EMERGENCY &
EXIT LIGHT INSTALLATION WORKS:
1) All
lighting circuits shall be installed with a maximum loading of 1800 Watts per
circuits.
2) The
only breaker size permitted to be used is 5, 10 And 15 Ampere.
3) Additional
exit light & emergency lights circuits shall be connected with the existing
light circuits.
4) Light
fittings shall be supported by direct support from the false ceiling framework
(Providing the Ceiling has been designed to withstand the Weight of the Light
Fittings).
5) When
using this method, it shall be possible to completely withdraw the light
fitting from the ceiling without damage to the ceiling or reducing its
rigidity.
6) Light
fittings shall be supported by chain support from the underside of the
structural supports.
7) Each
chain shall be secured to the structural support by means of a hook, and at the
light fitting, by an approved hook with threaded portion to allow for levelling
of the light fitting.
8) Exit
light arrow arrangement and direction shall be arranged as per the approved
drawings.
7.3 WIRING
DEVICES INSTALLATION:
1) 13
Ampere switched socket outlets installed in rooms other than kitchens shall be
connected using the ring main principle with a maximum of 10 Nos. single socket
outlets or 5 nos. double sockets on any one circuit, or one circuit not
covering a floor area of greater than 100 m2 whichever is the
less.
2) Twin
socket considered as 2 Nos.
3) Each
ring main shall be connected to its own circuit on the distribution board using
4 mm2 P.V.C. cable for the earth conductor and shall be
protected by a 30 Ampere MCB.
4) All
conductors shall complete the ring for each circuit, including the earth
conductor.
5) One
socket outlet of 15 A rating may be connected to a single phase and neutral
circuit wired with 3 x 2.5 mm2 cables, protected by a fuse or
circuit breaker not exceeding 16 A.
6) One
special purpose outlet of 15 or 16 Ampere rating may be connected to all single
phase and neutral circuit wired with 2.5 mm2 cable, protected
by a fuse or circuit breaker not exceeding 16 Ampere.
7) No
socket outlet shall be mounted within two meters of any tap, sink or basin, in
any kitchen, cloakroom, etc. without the special approval.
8) No
spur outlets will be permitted from any ring main wired in 4 mm2 phase
conductor and 2.5 mm2 earth conductor.
9) Joints
will not be permitted in any final circuit wiring except at socket outlets,
switches, ceiling roses, general accessories and light fittings.
10) A maximum of 6 Nos.
spur units may be connected on radial circuit using 4 mm2 P.V.C.
cables for the live and neutral connectors and 4 mm2 P.V.C.
cables for the earth and shall be protected by 20 Ampere circuit breaker.
11) Each Circuit shall be
connected to its own circuit on the distribution board or Sub main Board using
Cable sizes 10 mm2 , 6 mm2 ,4
mm2 P.V.C. Cable for the Power supply and
shall be protected by a 30 Ampere MCB as per load requirement.
7.4 ISOLATOR
INSTALLATION WORKS:
1) Mark
the location of isolator on the walls or ceiling. The mounting height of
isolator/disconnect switch in the walls are as follows
2) 40A
isolators mounting height shall be 1200mm AFFL or as per the site condition.
3) Fix
uni-strut channel support on the wall/ceiling. Ensure that it is fixed properly
and rigid.
4) Fix
the isolator/disconnect switch on the unit-strut channel
support. Ensure that it has been fixed vertically and horizontally
aligned.
5) Terminate
the incoming and outgoing feeder cable using appropriate wiring
accessories.
6) Raise
Request for Inspection for isolator/disconnect switches installation.
2. Risk
Assessment
All required safety
precautionary measures shall be taken before the start of the work and during
the execution of this works as per the Risk Assessment provided, refer to the
attached risk assessment.