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How to do Installation and termination of Electrical cables(HV, MV, LV)?

How to do Installation and Termination of Electrical cables(HV, MV, LV) :



1.Material :

All wires and cables to be examined prior to installation. No wire or cable with bruised, cut or abraded insulation, or wire that does not pass a continuity test shall be used.

2.Tools and equipment :

Truck, crane, cable drum jacks, cable drum shaft, cable socks, cable rollers, cable cutter, hydraulic crimping tools, hand crimping tools, scaffolding with wheels, ladders, torque wrench, box spanner set, ring spanner set, open end spanner set, screw driver, hack saw frame, measuring tape, drilling machines, holesaw cutter, cutting pliers. 

3.Preparation :

Cables shall be identified with regard to type, size, length etc. And shall be inspected for any physical damage. The cable shall be free from any damages and the ends sealed with caps to prevent the ingress of water during transportation or storage. 

4.Installation :



All cable shall be megger tested prior to pulling cable. 

Prior to commencing the cable pulling, cable drums shall be set in place and all necessary equipment, tools and hardware set up to start the cable pulling. 

Pull cable into position by hand, where possible using an adequate number of operative roller guides suitable positioned along cable length. 

Spacing between cables to be followed for multi core cables. 

Dameged cables shall be removed

5.Termination :



Before commencement of termination, cables shall be tested for insulation resistance and continuity of conductors. 

Cables to be terminated shall be stripped at the termination end and the sheath along with the armour shall be removed. 

Cable glands selected based on the diameter of the cable shall be fixed at the termination end of cable and fixed to the gland plates of switchbord or equipment using back nut complete with earth tags and shrouds. 

In case of single core cables the gland plates shall be of non metallic materials. 

The armoured of multi core cables shall be grounded to earth system at both ends through earth tags. For single core cables the earth bonding shall be only at one end. 

Each core of the cables shall be cut to the required length and approved terminal ends shall be crimped at the ends using Hydraulic crimping tool. Manual crimping tools shall be used. 

The cores shall be colour identified /labeled using approved markers or labels and shall be neatly dressed and supported in the terminal boxes and panels. 

Cable sockets shall be correct size for type of cables. 

Cable gland shall be used for terminating cables to switch gear, switch boards, motor control centres, motors and other equipment. 



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Comments

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