cable sizing

[str]

is 1.5mm2 cable okay to use for a switch to power an outside light? this is to replace existing cabling, so that the switch can be relocated - the cable running externally is external rated and isn't being touched

its just a temporary fix until the spark comes in a couple of months time to do the major work

 

[sparkyspike]

Yes, usually.

In fact 1.0mm is usually fine.

Use the same size cable as the one you are replacing. Also check what size fuse the relevant lighting circuit is on.