NATIONAL ALUMINIUM COMPANY LIMITED - Rites

PASSIVE FIRE PROTECTION
Fire protection for cables at entry/exit points of the wall shall be provided with proper sealing
by fire sealing material. The fire sealing compound shall be rated for minimum 2 Hours. Fire
retardant painting shall also be provided on cables for 2 Mtrs on both sides of the wall/floor
crossing.
ERECTION & INSTALLATION ACCESSORIES
All cable accessories like conduits, inserts, cable tag markers, clamps, sealing compound, pull
boxes, marshalling boxes etc. shall be considered as part of the Bidders scop scope to complete the
erection job in all respect.
OTHER ITEMS
Bidder shall provide all required switches, cabling and other devices needed for proper
control, operation, interlocking and sequencing of the any other offered systems and
technological mechanism, if specified in technological, e.g. hanging magnets and wi wipers (if
applicable), roof exhaust fans & wall exhaust fans (if applicable), etc.
All required safety items like rubber mats in front of MCC/DB/Panel, shock treatment chart,
first aid boxes, danger boards, boards indicating 'Man on Work, Do not switch ON ON', 'Do not
switch OFF', 'EARTHED' etc. shall be provided in each electrical premises.
Wall mounted aux. AC and DC distribution boards shall be provided in sufficient number to
facilitate proper distribution of the power supply to various users.
Bidder to include closing of all cable and panel openings through a Fire sealing material. This
shall include closing of all bottom opening of control room panels/desks, MCC switch boards,
wall openings in all the areas, etc. Bidder shall also include earthing of all equipments/system,
wherever required, under his scope of supply.
Bidder shall include painting of all the plant and equipment with approved shades and include
primers as well as finishing paints.
Sufficient quantity of GI ladder type factory fabri fabricated cated cable trays made from 2.5 mm thick hot
welded steel sheets grade ‘o’ as per IS: 2062 shall be provided. Hot dip galvanizing of 85
micron thick as per IS-2629, 2629, IS IS-4759 and IS- 209. Trays shall be of standard length of 3 m with
max deflection not exceeding ding 1/400 of span with sufficient load bearing capacity.
4.16 ERECTION OF ELECTRICAL EQUIPMENT
Bidder shall include erection of all the equipment under his scope of supply. Erection of
equipment shall have to be carried out as follows:
Technical Specification:Sec-6, Electrical
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