Cooker and garage wiring

[huw169]

As i'm doing a full rewire on the ground floor, it makes sense for me to plan for the future.

Is 6mmsq cable and a 40a breaker enough for future proofing the cooker, or should I put in a 10mmsq cable and 63a breaker?

Also, I am going to put in a seperate supply to my garage via a split tail breaker near the CU. This will then be run in 3 core armoured about 20-25m to a mini CU in the garage. I plan to use domestic welders in the future, so will 6mmsq armoured be enough?
A mate (spark) believes that welders are usually run off 16a supply as they are basically a step up transformer - is this right?

Many thanks
Huw

 

[RF Lighting]

Ive got a bit of a domestic workshop in my garage, including a couple of small welders (only use one at a time).

I have a 16mm² supply to the garage on a 50A type C MCB.

You nead a decent sized cable on an overcurrent protective device which can cope with the high inrush currents of a welder.

As long as you put in a decent CU, there is no need to split the tails. You can run the garage off your main CU.

 

[huw169]

Cheers RF
I thought welders 'spiked' and needed greater protection. Cheers for confirming.
I already have a small splitter box, so will probably keep it seperate from the house supply.
Cheers for the reply.
Huw

 

[ban-all-sheds]

As i'm doing a full rewire on the ground floor, it makes sense for me to plan for the future.

Have you submitted your plans to LABC for approval?

Is 6mmsq cable and a 40a breaker enough for future proofing the cooker, or should I put in a 10mmsq cable and 63a breaker?

6mm² on a 40A? 10mm² on a 63A? What installation method are you using?

Also, I am going to put in a seperate supply to my garage via a split tail breaker near the CU. This will then be run in 3 core armoured about 20-25m to a mini CU in the garage. I plan to use domestic welders in the future, so will 6mmsq armoured be enough?

http://web.archive.org/web/20080213151445/http://www.kevinboone.com/cableselection_web.pdf

http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

Select 2-core, even though you are using 3-core, and PVC even if you are using XLPE.

 

[huw169]

Cheers for the reply.
The installation for the cooker will drop through the floor from the CU into the 2ft cavity below and then pop up at the cooker.
Plenty of ventilation, and minimal bundling.
I figured for an 8.8+kw cooker, then 10mmsq & 63a would be best.
Hob will be gas.
The links you posted helped.
Cheers
Huw