- Reaction score
- 20
I am looking at section 722 of 18th edition for EV charge points. Section 722.411.4 imposes restrictions on the earthing arrangements for TN systems. For an external chargepoint connected to a domestic PME supply the accepted solution to avoiding the restrictions of 722.411.4.1 seems to be to provide a separate earth rod for the charge point and separate this from the PME earth i.e. an independent TT arrangement. My question is as follows: if SWA is used to feed the external chargepoint, how should the armour be earthed to avoid interconnecting the PME and the charge point's earth rod? This must be quite a common scenario for an external chargepoint fixed to a pole in a driveway.