On May 7, 2:11*pm, "Toby" wrote:
The distance between the house and the garage is about 15m, so I was
planning on exporting the earth, using the amour of 2 core SWA, is that
unreasonable for an exported earth?

It comes down to...
#1 SWA armour cross-sectional area - which should be ok.
#2 No incoming services, garage floor dry, class-2 tools

If you have incoming services you need 10mm 3-core to bond them back
to the MET, you can not use the steel wire armour because its cross-
sectional area converted from steel is not equivalent to 10mm copper.

Personally I would use 3 core SWA because it means you are not reliant
on the armour integrity. The cost difference is probably not too
different. Conversely if you are not exporting the house earth, and
garages can have damp concrete floors or class-1 tools, then 2-core is
fine with a TT supply & local earth rod.

If price is high on the SWA always worth checking Ebay for a cheap
offcut - does happen, you may have to wait a while.