PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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2. The cables shall conform to the latest editions of following IS and other<br />
relevant IS mentioned therein<br />
IS 7098 (Part-<strong>II</strong>): Specifications for cross linked polyethylene Insulated<br />
PVC sheathed cables for working voltages from 3.3 KV<br />
up to and including 33 KV.<br />
Drawings and Schedules:<br />
Sizes of cables shall be given in single line power diagrams. A cable schedule shall<br />
be prepared on the basis of relevant drawings. All cable and wires shall be<br />
adequately sized to carry continuously the normal currents expected on the relative<br />
circuits. All trenches for electrical cables shall be separate from water or sewage<br />
pipe line trenches.<br />
Splicing and Termination:<br />
Straight through joints shall be avoided. In case, these are absolutely necessary<br />
they shall be made at convenient locations suitably protected as approved and<br />
sanctioned by the Engineer-in-charge but in no case within the conduit pipes or<br />
ducts. Branch circuit wiring shall be spliced only in switch boxes, panel switch<br />
socket outlet boxes light fixtures outlets and circular junction boxes. They shall be<br />
made only with approved porcelain connectors.<br />
Cable glands for strip armored cables shall include a suitable armour clamps for<br />
receiving and securely attaching the armoring of the cable in a manner such that no<br />
movement of the armour occurs when the assembly is subjected to tension forces.<br />
The cable gland shall not imposed on armoring, a bending radius not less than<br />
15 times the diameter of the cable. The clamping ring shall be solid and adequate<br />
strength.<br />
Provision shall be made for attachment of an external earthing bond between the<br />
clamp of the cable and the metallic structure of the apparatus to which the cable box<br />
is attached.<br />
Compression type cable end glands shall be used for cable connections. Double<br />
compression cable end glands shall be used for flame proof switch gears. Cable<br />
glands shall be of brass with cadmium or nickel plating.<br />
Tinned copper lugs shall be used for cable termination.<br />
Cables shall be tested in accordance with IS:1554 / 7098<br />
GTS : General Technical Specification. Page 118
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