Proper care and precautions should be taken while handling, storage and installation of Power cables. The general recommendations are as follows:
HANDLING: The cable drums should be unloaded from trucks or railway wagons with the help of crane, fork lift or using a proper ramp with 1:3 or 1:4 incline so as to avoid damage to the outer layer of cables, The cable with drum or without with drum should never be thrown or dropped on the ground from the truck or wagon.
STORAGE: The cable drum should be stored in dry covered area having concrete/firm surface. The drum should be stored in such a way that the bottom end of cable is not damaged, Cable drums should not be stored one above the other
INSTALLATION: Cable should be unwound from the drum after lufting the drum on the centre shaft supported on both the ends with suitable jacks/ stand. if the cable is in coil form then it should be unwound by putting the coil on a rotating pat off or by rolling the coil held vertically. if unwinding the coil by rolling then it should be ensured that the fround surface is even and smooth so that the cable is not damaged.
The cable drum should always be stored with flanges vertical and lying flat on the griund. The drum should be rolled in the direction of arrow to avoid loosening and entanglement of cable winding. The drum should not be rolled on rocky uneven surface with sharp projections.
Recommended safe pulling force in Newtons when cable is pulled with pulling eys is:
Recommended safe pulling force in Newtons when cable is pulled with stockings is:
Recommended minimum bending radius of power cable is:
Power Cable | 1.1 Kv Cables |
---|---|
Single Core Cables | 15*D |
Multicore Cables | 12*D |