On 02/01/2018 07:25, Handy Andy wrote:
On 01-Jan-18 6:34 PM, John Rumm wrote:
On 01/01/2018 15:59, Handy Andy wrote:

Be grateful for some advice from the electricians here.

I've been asked by a relative to complete an electrical installation to
a garden shed/outbuilding. The electrician originally asked to do this
job has disappeared after partially completing it. He has connected a
roll of SWA via an isolator, but that is as far as he got.

It's a relatively simple matter of running the SWA to a CU in the
outbuilding and putting in some lights and a couple of sockets. The
problem is that the appliances to be installed in there will use about
6kW of power and I'm not sure that the SWA is rated high enough. The run
is a good 25 metres and I can't tell exactly what size the cable is.

Full details of what you need to do are covered he

http://wiki.diyfaq.org.uk/index.php/...ub_main_design


However, if you have 6kW of load, that's about 26A total. At 12mV/A/m
voltage drop (if it is 4mm^2) that puts you at about 6.9V at 25m,
which is just about ok. Current carrying capacity is ample for that load.



Very useful information. Thanks for that.

The SWA route to the outbuilding is across some pretty difficult ground,
so burying the cable in places is liable to be quite a problem, any
views on an alternative?

It does not have to be buried. It can fixed to any suitable structure
(i.e. preferable not something "temporary" like fence panels). All you
are really attempting to do it keep it out of harms way.


--
Cheers,

John.

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