Volume-IF - JantERmantER

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OCPL-K9A01
ii) Ground Conductor 40 mm diameter mild steel rod.
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iii) Distribution Boards 50 x 6 mm GS Flat
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iv) Lighting Panels, Local panels 35 x6mmGS Flat
v) Push Button Station Junction 8SWGGlWire
Box etc.
Distribution Boards
3.15.1 The following distnbution boards have been enVisaged :
a) One (1) No. 415 V AC Distribution Board located at Ground level having
2 Nos. 415 V, 3 ph, 4 wire incamers & castle-key interlock to prevent
paralleling of two supplies. ThiS Distribution Board shall feed two (2)
Nos..L1ghting Distribution Boards.and 63 Amps Receptacles.
b) One (1) No. 415 V AC Emergency Distribution Board located at Ground
level from which emergency supply for staircase and platform lighting of
stack, elevator and aviation lighting panel shall be taken.
This emergency distribution board shall be fed from two different
serVices - one from the above mentioned 415 V AC Nonnal distribution
board and the other from Owne(s 415 V AC e(T1ergency switchgearl
MCC through one 415 V, o"n11 dry type transformer. On failure of
nonnal AC supply, the emergency power will take over by means 01
4 automatic switching.
c) One (1) No.Avtation lighting Panel located suitably from which supply
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to aviation lights at different elevations have been taken through
conduits. .
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d) Lighting Distribution Board No. 1 at Ground level shall feed all stairoase
lights and platforms inside staCk upto-IooNer middle half of the stack.
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. e) Lighting Distributiol) Board No. 2 suit8b1y·locatedshall feed all staircase
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lights and platform at remslning upper portion ofthe stade
(: All bought out electrical equipment shall be from reputed manufacturers who
have manufactured and supp6ed equipment of the type & rating specified and
these equlpments shall have been in successful operation in power plants for at
least three (3) years.
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3.16.2 . The Contractor shall design and prepare detaUed drawings of various electrical
system like Power distribution arrangement, lighting, lightning protection
grounding system etc. and shall submit the same to the OwnerfConsul fot
their review approval.
(PCACO-OO3.se05CSA24.doe.doc) V.lI-D2fS-XXIV : 33
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