Hi,
Please could someone advise on the following regarding EV chargers on a balanced 3 phase supply.
We are proposing to install 3 x 75kw DC rapid chargers from a new DNO connection solely for the EV chargers. The chargers themselves only require 3 phase & earth and the only 230v supply from the new connection is a small anti-condensation heater within the feeder pillar (20w).
Can I therefor still use the rule of thumb from CoP J4 as Regulation 722.411.4.1 (i) has now been removed from amendment 2?
When I calculate using Regulation 722.411.4.1 (ii) I end up with a minus number so I assume this shows an earth electrode & PME supply is not suitable?
Thank you in advance.
Mark