earthing of cable armour
earthing of cable armour
(OP)
all the cables used in a substation are armoured .which end of the cable armour should be earthed.inside control and protection panels or in the marshalling kiosks at the switchyard?
thanx.
thanx.






RE: earthing of cable armour
The only times I have seen that only one end is earthed have been:
(1)When cabling from site to site and you need to keep the site earthing systems isolated from each other.
(2) For some instrument signal cables. From memory it was thermocouple cable.
RE: earthing of cable armour
RE: earthing of cable armour
If this was an installation covered by the NEC, the armor would need to be grounded at both ends, I believe.
RE: earthing of cable armour