Recently sat the 18th Edition Course and of the understanding EV Charging points shall be fed from a TT Supply. PME is acceptable only when feeding any other equipment ie Lamp posts Ticket Machines for example and providing Type A or Type B RCD is fitted and the Charger point is then to be separately spiked. Just looking on the attached and a company called Pod Point suggest TN-S is acceptable with no need for an earth spike. Wondered if anyone else has come across this diagram and can confirm TN-S is acceptable without the spike (see - page 2)
Almost - there also need to be an earth electrode at the source, connecting N to true earth; otherwise you end up with an IT system rather than TT.
In consumer's terms, the characteristic of a TT system is just that the consumers earthing conductor is connected to a local electrode instead of the supplier's earth terminal - and as a consequence everything (including submains) need RCD protection.
Almost - there also need to be an earth electrode at the source, connecting N to true earth; otherwise you end up with an IT system rather than TT.
In consumer's terms, the characteristic of a TT system is just that the consumers earthing conductor is connected to a local electrode instead of the supplier's earth terminal - and as a consequence everything (including submains) need RCD protection.
