GAIL (India) Limited

1411. Indicating lamps and push buttons:Indicating lamps shall be of the LED type of low watt consumption, provided with series resistors wherenecessary and with translucent lamp covers. Bulbs and lenses shall be easily replaceable from the front.Push buttons shall be of the momentary contact, push to actuate type fitted with self-reset contacts andprovided with plates marked with its junctions.12. Cable terminations:Cable entries and terminals shall be provided in the switchboard to suit the number, type and size ofaluminium conductor power cables and copper conductor control cables as indicated in the schematicdiagram.Provision shall be made for top or bottom entry of cables as required Generous size of cabling chambersshall be provided, with the position of cable glands and terminals such the cables can be easily and safelyterminated.Barriers or shrouds shall be provided to permit safe working at the terminals of one circuit withoutaccidentally touching that of another live circuit.Cable riser shall be adequately supported to withstand the effects of rated short circuit currents withoutdamage and without causing secondary faults.Cable sockets shall be of copper and of the crimping type/soldering as required.13. Control wiring: A1l control wiring shall be carried out with 1100/650 V grade multistandard Copperflexible wire conforming to relevant IS having stranded: copper conductors of minimum 2.5 sq. mmsection for CT Wiring and 1.5sq mm for Control/indicating Instruments.Wiring shall be neatly bunched, adequately supported and properly routed to allow easy access andmaintenance.Wires shall be identified by numbered ferrules at each end. The ferrules shall be of the ring type of nondeterioratingmaterial. They shall be firmly located on each wire so as to prevent free movement.All control circuit fuses shall be mounted in front of the panel and shall be easily accessible.14. Terminal blocks and labels:15. Tests:Terminal block shall be of 500 volts grade of the stud type. Insulating barriers shall be provided betweenadjacent terminals.Terminal block shall have minimum current rating of 10 amps and shall be shrouded. Provisions shall bemade for label inscriptions.Labels shall be made of anodized aluminium, with white engraving on black background. They shall beproperly secured with fasteners. Danger plate of size and descriptions as recommended in the relevant ISshall be provided on the PCC./PDB/MCC.i) The power control centre shall be completely assembled, wired, adjusted and tested for operation undersimulated conditions to ensure correctness of wiring and interlocking and proper functioning of allcomponents.ii) Each power control centre and components shall be subjected to standard routine tests as per applicableclauses of relevant standards.