Electric Vehicle Charging - Unit 7: Earthing arrangements
Unit 7 introduces earthing of EV charging installations in installations with the most common three types of public supply: TN-C-S; TN-S; and TT.
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• Why TN-S systems from DNO supplies should be treated in the same way as TN-S
• How to conduct a simultaneous contact assessment in relation to TN-C-S and TN-S supplies
• How electrical separation may be used to prevent simultaneous contact issues
• The limits of a separate TT system in addressing simultaneous contact issues
Director and Principal Consultant at G Kenyon Technology Ltd, Graham has established his reputation designing and implementing control and information management systems in the challenging environments presented by world-class construction programmes in the airport and railway industries.
Graham is well versed in standard-setting, as he serves as: Chair of the IET’s Wiring Regulations Policy Committee; a member CIBSE’s Electrical Services Group Committee; an IET representative on JPEL/64 (BS 7671, IET Wiring Regulations), under which he also serves as Deputy Chair of JPEL/64 sub-committee D.
Graham is author of the 3rd Edition of the IET Code of Practice for Electric Vehicle Charging Installations, co-author of the IET Code of Practice for Electrical Energy Storage Systems, and editor of some of the IET’s forthcoming Wiring Regulations publications: Guidance Note 5 Protection against electric shock (8th Edition); Guidance Note 6 Protection against overcurrent (8th Edition); and Electrical installation design guide (4th Edition).