On 27/01/2020 16:05, Adam Funk wrote:
On 2020-01-25, ARW wrote:
On 25/01/2020 09:37, wrote:
On 25/01/2020 03:12, ARW wrote:
On 25/01/2020 00:25, wrote:
Which cable types are now required for:
a) nonburied run to shed, some attached to brickwork, some laid on
ground under plants
b) surface clipped run to lighting, some lengths under plants some not.
If there is a risk of damage due to strimmers/ cutters etc then you
need a cable with an outer earth sheath. So that's SWA or SY.
If not then use NYY-J cable.
I hadn't heard of NYY-J until now, why would you use it rather than SWA?
NYY-J used to be sold under the name Hi-Tuff. It's cheaper than SWA,
does not need glanding off and is ideal for outdoor surface mount jobs.
It is not suitable for direct burial in the ground unlike SWA.
The description I found on-line says:
Indoor use where mechanical damages are not to be expected.
Outdoors, Underground, in Brickwork, Concrete with the exception of
cabling in shaken, vibrated or compressed concrete. and in Water.
The UV-resistance allows for outdoor use.
https://www.tlc-direct.co.uk/Main_Index/Cable_Index/NYY/index.html
Doesn't using it where garden tools might hit it count as risk of
mechanical damage? (That's why I used SWA clipped to a garden fence
to my shed.)
Strictly speaking SWA should be protected from damage:-)
Assuming you are talking about a plastic strimmer wire then I doubt it
would damage either cable unless it was a sustained and violent attack
of the strimmer. A spade will damage both. I did like Tim Lambs idea of
running the cable through galv conduit. You cannot get a spade through that.
It's down to the installer to decide which they are going to fit. I just
gave an option to SWA.
I probably should have called it Hi-tuff but ISTR the trade name went
out of business.
--
Adam