About 180 metres of exposed metal trunking contains cables to three 7kW electrical vehicle chargers in a supermarket car park. The metal trunking is positioned at knee/waist height for much of its run and is affixed to brick walls along customer walkways outdoors.
Do you think that the trunking is earthed, or will it just contain S.W.A. cables and not be earthed, as likely the supply is P.M.E?
The regs. seem not to prefer large outdoor metal conducting masses connected to a P.M.E. supply, such as caravans and steel hulled boats etc.
Z.
