Outbuilding or garage supply

[Jeremy Hale]

To supply power to new garage 20 meters at bottom of garden from main house.

Plan to run a three core 4mm SWA to garage, fit a metal clad two way dB with 30ma RCD in garage. Using one off the three cores together with the armour as cpc.

At the house end terminate swa in An adaptable box adjacent to house BD and use 6mm twin and earth to connect lives and earth to a 20A spare way of existing plastic board.
This incorporate an RCD covering whole installation. There is an earth rod so I assume this is a TT installation.

Assuming Zs at garage is ok. This is what I planed

However lots of talk about fitting an earth rod at garage end.
In your opinion should I also fit an earth rod at garage end and common back up earth. Also I think I could ask for supply co for a pms at this site there is a new cut out or would this be just complicating things

 

[EricMark]

This old IET pdf should help it is a little dated, in 2005 we did not have RCD protection like we use today, but general principle is the same.

The problem is Part P, the fees charged by the local authority are silly, in rest of UK using a 13A supply from a FCU could get you around Part P but since your in Wales no real way around it.

The other problem is volt drop, corrected and within lighting requirements should be able to use around 34 meters of 4 mm so should be no problem.

 

[westward10]

Duplicate thread see following link.

Outside garage supply

To supply power to new garage 20 meters at bottom of garden from main house. Plan to run a three core 4mm SWA to garage, fit a metal clad two way dB with 30ma RCD in garage. Using one off the three cores together with the armour as cpc. At the house end terminate swa in An adaptable box...

www.electriciansforums.net

 

[westward10]

Thread is now being closed.