Sub Board to be wired from Main Board

[CathalX]

I am supplyng a small fuse board to a garage adjacent to the main house with a 4mm SWA. This cable is rated at 36A according to IEEE Table.
There are only four twin sockets, a water pump and some lights in the garage installation

Do I need to have an isloator switch between both boards?
Can I run directly off a 35A fuse in the main board straight to the local board?
What should I rate the garage main fuse given that it I have a 35A at the Main Board?

 

[andy]

I am supplyng a small fuse board to a garage adjacent to the main house with a 4mm SWA. This cable is rated at 36A according to IEEE Table.
There are only four twin sockets, a water pump and some lights in the garage installation

Do I need to have an isloator switch between both boards?
Can I run directly off a 35A fuse in the main board straight to the local board?
What should I rate the garage main fuse given that it I have a 35A at the Main Board?

you cant get a 35A fuse or MCB. 30A fuse or 32A MCB.

isolator before SWA to new board

 

[CathalX]

You would recommend SWA out of 30A MCB through isolator to main fuse in garage board. How much lower should the main fuse be in relation to the 30A supply from house?

 

[plugwash]

you cant get a 35A fuse or MCB. 30A fuse or 32A MCB.

oh yes you can

wylex standard:http://www.tlc-direct.co.uk/Products/WYC35.html

wylex ns:http://www.tlc-direct.co.uk/Products/WYNSC35.html

 

[mapj1]

?

You would recommend SWA out of 30A MCB through isolator to main fuse in garage board. How much lower should the main fuse be in relation to the 30A supply from house

It could be the same rating, and even if it is half, they may not discriminate correctly with a short circuit fault. I'd suggest you may not need an incoming breaker other than an RCD one at the garage end, just a 5or 6a for lights, and sockets either as 4mm radial with no additional protection, or with 16A breaker in 2.5mm
regards M.

 

[ban-all-sheds]

We used to have a regular here from Ireland, but in the meantime I sugest you post your question in "Electrics Outside the UK", and people on this forum should avoid answering unless they are sure what the Irish regs require...

 

[mapj1]

I understood the Irish regulators recognised complience with the IEE ones as equivalent, as we do here. which is why they are the other European country that don't have bathroom sockets....
regards M.

 

[ban-all-sheds]

Well we now recognise compliance with the regs of any country in the EU as meeting compliance with the Building Regs.

Anyway - the OP keeps referring to IEEE regulations. Could be an error, or could be a different body....