Garage electrics upgrade

[Franknstein]

That is not what I said, I said it is dependent on the cables installation method which can affect its current carrying capacity this is why you need an electrician to assess it.

Sure. Cable is under 100mm rockwool type loft insulation laying flat on plaster ceiling board, so method 100 I believe, falls short to 38amps.

 

[telectrix]

looks more like 10.0mm cable to my eyes. clear the insulation from it and you're good for 63A

 

[SJD]

If I'm following the correct E from the supply cable on the photo, it is solid, so it will be 2.5mm2, meaning the cable is 6mm2 ?

EDIT: As seen at the earth bar (at the cable, it is not so clear).

 

[westward10]

If I'm following the correct E from the supply cable on the photo, it is solid, so it will be 2.5mm2, meaning the cable is 6mm2 ?

Is what I did looks stranded at the cable but solid at the earth bar.

 

[Franknstein]

I've just verified a 6.0 debossed on the sheathing on the main house consumer side. So it's definitely 6mm2 t+e. I haven't verified if it's buried under loft insulation yet but I've been in the loft many a time and pretty sure it is. If I lift it from the insulation and clip it to the joists I could run 47a through it by my reckoning.

 

[LewisM]

You'd have to clip it to the joist and push all insulation away from it. you are probably best off just replacing the supply cable

 

[Franknstein]

Even if I keep the original 6mm feed with 32a MCB on the main feeding 40a RCD on the garage, surely I'd be able to run my 25a compressor load and some fluorescent lights concurrently and modify the garage consumer unit accordingly and still be within the regs? Do either of my proposed designs have any merit or are they floored in some way?

 

[westward10]

This really isn't DIY territory as I have already said you need to consult an electrician who can if necessary notify Building Control.

 

[Franknstein]

This really isn't DIY territory as I have already said you need to consult an electrician who can if necessary notify Building Control

This really isn't DIY territory as I have already said you need to consult an electrician who can if necessary notify Building Control.

This really isn't DIY territory as I have already said you need to consult an electrician who can if necessary notify Building Control.

I appreciate your concern for my safety and the law of the land. However I'm not asking anyone here to vouch their advice or be responsible for it. I'm asking some simple questions on basic electrical regs with a lot of detailed information supplied, and I'll hopefully learn something along the way even if that may be to enlist the help of a professional. If nobody wants to share their knowledge, that's no problem, but 'speak to an electrician' is not helpful. I understand where you're coming from (and totally expected to get this response from at least one or a few people) but I prefer to do everything myself and learn from the experience. I like to think I do it in a responsible manner too.