Just a quick question for the pros-
Are overhead power cables either HV from pylons or usual domestic overhead supplies insulated like for instance twin and earth cable in your house.
If not how come is it purley a case of the high current running through would destroy the insulation but surely under ground HV cables would have the same trouble? Just curious-Many thanks
Are overhead power cables either HV from pylons or usual domestic overhead supplies insulated like for instance twin and earth cable in your house.
If not how come is it purley a case of the high current running through would destroy the insulation but surely under ground HV cables would have the same trouble? Just curious-Many thanks