NATIONAL ALUMINIUM COMPANY LIMITED - Rites

number of slots in which the switches and ssockets
ockets shall be assembled. The sockets shall be of
three pin design with phase neutral and earth conducts.
Earthing
All electrical equipment shall be effectively earthed as to meet the requirements to Indian
Electricity Rules and IS:3043 IS:3043. . Earthing conductors for individual equipment shall be of either
galvanised mild steel flat or stranded/solid G.I. wire as specified.
Earth pits for street/area lighting poles
The earth pits shall be consisting of 40 NB GI pipe of 3 mtr length, funnel funnel, salt, charcoal, cast
iron cover, clamps, etc. The Bidder shall include all civil work as per requirement. All
accessories shall be included as per requirement.
4.14 LIGHTING HIGH MAST WITH FLOOD LIGHT FITTINGS
General
a. High mast tower for floor ligh lighting ting shall be factory fabricated mild steel plates welded,
polygon section, hot dip galvanized and provided in standard lengths.
b. The structure shall be 30 meter high, well tried, proven design to withstand high wind
speed of 180KM/ hr.
c. The mast shall have ave a movable lantern carriage tower from the top of tower to bottom and
vice-verse verse with the help of a motorised winch arrangement (with motor of minimum 2.2
kW capacity) and shall be provided with suitable gears, pulleys and ropes. The reeling of
ropes shall all be such that to prevent twisting & tangling. Means shall be provided for normal
operation of the winch in case of failure/ non availability of power to the motors. Safety of
lantern carriage in case of breakage of the rope shall be ensured by arresting free fall of the
lantern carriage to the ground by providing Safety locking arrangements.
d. All the carriage components shall be galvanised and mounted inside the tower. The tower
shall be provided with a suitable man entry door at the bottom section to facilitate
inspection and maintenance. The door shall be weather proof and provided with safet safety lock
to prevent unauthorised access.
e. The lantern carriage shall be symmetrical, robust construction housing the luminaire and
control gear boxes. The cables to the luminaries shall be run inside the tubes of the lantern
with junction boxes provided for branch off cables.
f. Proper luminaries carriage ring support arms shall be provided for supporting the
luminaries’ carriage ring when the latter is lowered for maintenance of luminaries. Lantern
carriage ring should be in channel tube and with concealed wwiring
iring the carriage should be
Technical Specification:Sec-6, Electrical
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