On Tue, 17 Apr 2007 21:26:22 +0100, Lurch
wrote:

On Tue, 17 Apr 2007 17:40:55 +0100, DaveH
mused:


Anyone advise what size of cable is required for a sub-main going to a
granny annexe? The Annexe/flat has an 8kw electric shower, a 4.5kw
cooker and the usual aray of kitchen appliances. Will 10mm² twin-core
and earth be adequate? It'll need it to pass the part-p certification
periodic test.

And what size of main fuse is suitable for this sub-main?

The size on the cable depends on the length, installation method, load
etc... You have only given part of the information.

The length of the sub-main cable will be 8 mtrs.

Part p isn't a periodic test. Who is doing the commisioning and
certification of the installation?

Haven't decided yet.

10mm does sound small though, I wouldn't use it as a submain for a
flat with electric cooking and heating.

The flat would not normally have any electric room heating as it has
central heating.

DaveH