Can I use an isolating transformer supply method within D.C earth monitoring? – Voltimum

This question was taken from a Voltimum webinar covering Amendment 1 of BS 7671 - 18th Edition Wiring Regulations.

Question:

Can you purely just use an isolating transformer supply method within the D.C earth monitoring? Is there a new section for testing all EV charging?

Answer:

We assume the question relates to use of the protective measure of electrical separation. Use of this protective measure for electric vehicle charging installation is permitted by the 18th Edition, provided the requirements of Section 413 of Chapter 41 and Regulation 722.413.1.2 of Amendment 1 are complied with. Guidance on Supply and earthing arrangements for Mode 4 DC EVSE can be found in Annex K of the IET Code of Practice for Electric Vehicle Charging Equipment Installation, 4th Edition. Inspection and testing of the EV charging should be carried out in accordance with Part 6 of the 18th Edition (BS 7671: 2018, including functional checks that the equipment is operating correctly, due account being taken of the manufacturer's instructions.

- John Bradley -Chairman of JPEL/64 and Schneider Electric UK Standards Manager.

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Can I use an isolating transformer supply method within D.C earth monitoring? - Voltimum