Electrical Wiring

General

This guide is intended for a qualified electrician to refer to when installing or planning the installation of a Hypervolt Home 2.0 EV charger. The installation of Hypervolt products should only be carried out by people qualified to do so.

The information contained is for guidance only and does not override any local laws or regulations and in all cases, BS7671 must be adhered to in the first instance.

Overcurrent protection

The Hypervolt Home should be supplied by a circuit protected with a 32A MCB or RCBO. There is no inrush current when the Hypervolt activates so a B curve protective device is adequate however a C curve can also be used (This should not be confused with the RCD type, see below “RCD Protection”). 

Remember the supply cable you run to the Hypervolt should be adequate for the task. This should be assessed based upon the protective device, external influences, and the installation method utilized.

A lower than 32A MCB or RCBO may be used but you must ensure that you have permanently derated the Hypervolt using the configuration switches located inside. For more information on how to set the permanent internal power limit please refer to diagram 11 below.

***The unit should be set to 32A by default from the factory.

RCD protection

You must install the Hypervolt on a circuit protected by a Type A RCD with a 30mA operating current as a minimum requirement. Most new consumer units now come with Type A RCD’s fitted as standard rather than AC Type RCD’s which should be avoided downstream of charging units. You can identify the RCD type by these symbols:

Most manufacturers now supply A Type RCD’s as standard however it’s a good idea to check the symbols to be sure.

If you are adding a consumer unit with a spare way and an A-Type RCD already in place, you can fit an MCB as per the overcurrent protection recommendations above. 

If you are adding to a consumer unit with a spare way and no RCD protection or a split load board with a spare way before the RCD’s (so non-RCD protected) then you can fit an A-Type 30mA RCBO as per the overcurrent protection recommendations above.

If there are no spare ways in the consumer unit, the consumer unit is not suitable or in a condition that can be added to or parts are not available then you should install a separate consumer unit with the appropriate RCD and overcurrent protection.

The Hypervolt Home 2.0 includes a 6mA DC RCD that detects fault current and safely isolates the output circuit according to IEC 62955. This should not be confused with the need for the RCD protection described above.

Updated on 5 October 2021

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