Type A rcd in series or change at the board

[Mrshad]

I am to install a car charger that states a type A RVD is to be installed. Can this be put in the garage from the non rcd side of the board or is it better to change the RCD on the board and use that side. I assume it makes no difference

 

[Electro-tech]

How about an EV Charger that already has a type A Rcd built-in. MCB off none rcd side to give you discrimination . Also you will need an EV Tester. What type of earthing arrangement does the property have ? Have you calculated Max Demand ?

 

[Mrshad]

I put a 6mm in ready through to garage as it’s 7kw, it says on the info sheet a type a must be installed and it’s a tncs.

 

[Electro-tech]

So the EV charger does not have Rcd protection built in which surprises me. Rcd”s need to be A type now.In this case a Rcd that disconnects all live conductors.

 

[westward10]

So the EV charger does not have Rcd protection built in which surprises me. Rcd”s need to be A type now.In this case a Rcd that disconnects all live conductors.

Rcds do not need to be Type A it is that most situations will default you to a Type A.

 

[Risteard]

The charge point should have a dedicated RCD - it shouldn't be taken from the RCD protected side of the board.

 

[JBW175]

Does the charger come with built in PEN fault protection? If not, you’re going need to rod it too.

Just something else to think about.

 

[Mrshad]

How about an EV Charger that already has a type A Rcd built-in. MCB off none rcd side to give you discrimination . Also you will need an EV Tester. What type of earthing arrangement does the property have ? Have you calculated Max Demand ?

It says the following also no rod required..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.

 

[Electro-tech]

Why not speak to the manufacturer, then you will be installing it to their specifications. Ask about any other requirements for a TNCS supply .

 

[loz2754]

Rcds do not need to be Type A it is that most situations will default you to a Type A.

Indeed. 722.531.3.101 applies.
If the charging point does not have an in built RDC-DD, then a type B RCD will be needed.

 

[Alan-N]

I am to install a car charger that states a type A RVD is to be installed. Can this be put in the garage from the non rcd side of the board or is it better to change the RCD on the board and use that side. I assume it makes no difference

Hypervolt normally requires a 2 pole B curve Type A RCD + 32/40A MCB, you can either replace the RCD at the supply to the garage, or supply the garage DB from non RCD side of main DB and fit it in the garage, just don't use 2 RCD's in series.