NATIONAL ALUMINIUM COMPANY LIMITED - Rites

The starter holders shall be of well tried tried-out out design and of robust construction with provisions
for easy insertion and removal of the starter ensuring correct contacts by means of strong
spring action.
Push button for group switching of lights
The push h buttons (one no. ON and one no. OFF) shall be mounted on cast iron box with
2NO+2NC contacts and terminal block.
Conduits and Conduit Fittings
Surface conduit installation shall be carried out using hot dip / electro galvanised rigid steel
seamed by welding, screwed type, designed, manufactured and tested in accordance with IS
9537. The various conduit accessories like couplers, bends, elbows, reducers, saddles, clamps,
lock nuts, junction boxes etc. shall conform to IS 3837 shall be supplied and erec erected as per
requirement along with the conduits.
Point wiring materials and Accessories
The point wiring materials and accessories for lighting for installation, fan points, sockets etc.
where specified shall include wiring cables, conduits and conduit fittings, wiring accessories
inclusive of switches, sockets, fan regulators, switch boxes, junction boxes etc.
Point wiring
The wiring cables used in point wiring installation shall be 1100 volts grade PVC insulated
single core flexible stranded copper conductor type confirming to IS:694. The size of
conductors to be adopted shall be 2.5 sq.mm for lighting, fan and 5/15A socket outlet circuit
and 2.5 sq.mm for 15A socket power circuits.
Wiring Accessories
The various electrical wiring accessories vi viz. z. Switch boxes, switches and sockets shall confrom
to IS 5133, IS 3854 and IS respectively. The switch boxes shall preferably be of passed sheet
steel cadmium coated and passivated or galvanised with knockouts at the top and the bottom
for conduit entry. The surface mounted type boxes shall have necessary provisions for
mounting on the wall. Earthing terminals shall be provided in the box. Junction boxes provided
at intermediate points shall also be identical in construction to the switch boxes. The switch
and junction boxes shall be of standard dimensions with adequate wiring space. The switches
and sockets shall be made of superior quality engineering plastic with excellent dielectric
properties. The switches shall be of piano key design and shall have ad adequately equately rated switch
contacts. The switch contacts shall be silver tipped electrolytic grade copper. The switch plate
forming part of the switch box cover shall be made of plastic material and shall be made with
Technical Specification:Sec-6, Electrical
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