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Adding EV charge point to garage supply

Former Community Member
Former Community Member
Hi all, 

I need to replace the old fuse box in the garage with a CU and at the same time install a load balancing a fast charge outlet for electric vehicle.

Current installation has a sub panel in the house (40A) with type B MCBs: 20A for kitchen sockets and 32A for the garage supply. Main board is double RCD 80A, and DNO fuse is 100A.

10mm armoured cable underground to garage, approx 15m.

Plan is to move the kitchen sockets on to the main board (there is a spare), replace the adjacent garage sub panel for a 63A RCD panel with a 63A MCB, and replace the old fuse box in the garage with similar panel but with a 6A, a 16A and two 40A (one for the EV and one for the office that runs off this fuse box).


Does that work, or have I missed anything?


Thanks | Paul.
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  • 0
    Well UKPN, I wonder who the dinosaurs are? I assume that you are referring to JPEL/64 members, where there is DNO representation. I was told by the HSE Engineer just yesterday that there were more than 1000 broken neutral events reported last year, and if one of those happened to be your car on charge, and you were washing it at the same time, you might be gone for good. Now, I may have no particular objection to that event, but your family and friends might take it fairly seriously, and those failing to stick to the regulations could well end up in court.


    "Getting it right" as you call it is in reality fairly difficult, and in fact, there appears to be no completely safe option unless an isolation transformer is used, and even this has difficulties with access to differing Earthing systems. Do you know, even the DNO jointers are fairly sniffy about that, at least in my area, and the responsible Engineer is definitely very wary!


    Good luck with your PME, I assume you are campaigning against John Peckham in the campaign for real Earthing listed in the topics?


    David, CEng etc.
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  • 0
    Well UKPN, I wonder who the dinosaurs are? I assume that you are referring to JPEL/64 members, where there is DNO representation. I was told by the HSE Engineer just yesterday that there were more than 1000 broken neutral events reported last year, and if one of those happened to be your car on charge, and you were washing it at the same time, you might be gone for good. Now, I may have no particular objection to that event, but your family and friends might take it fairly seriously, and those failing to stick to the regulations could well end up in court.


    "Getting it right" as you call it is in reality fairly difficult, and in fact, there appears to be no completely safe option unless an isolation transformer is used, and even this has difficulties with access to differing Earthing systems. Do you know, even the DNO jointers are fairly sniffy about that, at least in my area, and the responsible Engineer is definitely very wary!


    Good luck with your PME, I assume you are campaigning against John Peckham in the campaign for real Earthing listed in the topics?


    David, CEng etc.
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