David Robinson
wibbled on Friday 25 June 2010 09:46

On 24 June, 23:44, Tim Watts wrote:
David Robinson
wibbled on Thursday 24 June 2010 18:33

On 24 June, 14:34, John Rumm wrote:

[snip]

Thanks for all the useful advice John (and others).

on 1mm^2 cable 2m long that would drop 3.3 x (2 x 18.10) = 119 mV
total, or around 1%. So that would be fine.

With lamps that could be up to 50W, then one cable per lamp would be
ok for shortish distances. If you need longer runs (say 5m or more)
then you could go up to 1.5mm^2.

I don't have any 1mm twin and earth at present. I wonder if I can re-
use all the old red+black 1mm I'm ripping out when re-wring?

Line/+ve - Brown,black,red,orange,yellow,violet,grey,white,pi nk or
turquoise Neutral/-ve - Blue

if you want to be pedantic (App 11, Onsite Guide).

Thanks Tim - that's exactly what I was looking at - but wasn't sure
whether that part was legally binding. It's not like 12V electrical
work is notifiable AFAICT.

Check again - I'm pretty sure it is in special locations and kitchens. But
it is stupid, so personally I'd ignore it - but just for the record like...


Is standard T+E sufficiently heat resistant?

Depends on the light fitting. It is rated to 70C max. Some do get seriously
hot out the back, some don't.

ELV
doesn't have to pass part-P, does it? I can sheath it brown and blue
if they're that bothered.

Technically yes or at least under some conditions like special locations)
(which might change).

Kitchen isn't yet though?

Kitchens are mentioned IIRC in Part P (the document).

Cheers

Tim
--
Tim Watts

Managers, politicians and environmentalists: Nature's carbon buffer.