Sub-main to the garage in house I just bought

[westward10]

I'm not worried at all, just thought in your own home it's nice to go a bit 'belt and braces'....

An S type 100ma rcd does not provide belt and braces for the failure of a 30ma RCD.

 

[Dave OCD]

As I originally posted, it wouldn't do any harm....

 

[DoubleInsulated]

The Zappi car charger recommends no RCD's before it, as its just been updated to comply with the 18th and has it's own RCD.
Link here to the charger they are installing.

Midsummer Wholesale

midsummerwholesale.co.uk

It's probably been installed a while (although the metal split load board in the garage looks newish).
TNS supply.

I'll leave it be. Seems well enough installed. No certs for it I did notice.

 

[littlespark]

I'll leave it be. Seems well enough installed. No certs for it I did notice.

I’m not surprised there’s no certs.
16mm for a couple of sockets?
Either all someone had in the van, or they really did think ahead, for the chance that maybe a future owner would like an EV.

 

[DoubleInsulated]

Hey all. I didn't start a new thread, as it's kinda the same subject.

Went around my bosses house yesterday and looked at his car charger install.... Hmm.

He has a 6mm 3 core SWA running clipped outside for about 10m. Feeds his garden office in which he only has a couple of lights and a a few sockets. Not much load and he is rarely in there.
The sparky has put a 32A MCB type B at the board end (apparently it used to be an RCBO), and this now feeds the 9 way board in his office.
The 9 way board has 100A isolator, SPD with it's own 32A MCB, then an MCB for the Zappi car charger (which has it's own internal RCD), and then after that.... a 63A RCD that protects the rest of the board with a 16A and 6A for the lights and power in the office.

Is that pushing the limits of a 6mm 3 core SWA? Granted the Zappi is set up to never allow more than 32A to be pulled.
Personally, I would have upgraded the 6mm to something bigger, but apparently it was done 'on a budget'.

Thoughts?

 

[brianmoooore]

6.0mm2 SWA is good for 60A or so under favourable conditions, so should be fine. MCB at the source end could be uprated a bit to 45A, subject to the usual checks.