On Mon, 18 Jun 2018 22:46:29 +0100, charles
wrote:

In article , Archibald Tarquin
Blenkinsopp wrote:
On Sat, 12 May 2018 12:59:25 +0100, ARW
wrote:

On 12/05/2018 09:03, Stephen wrote:
On 12/05/2018 08:15, ARW wrote:
On 11/05/2018 21:09, Stephen wrote:
HI, I will shortly be running 25mm blue MDPE pipe AND 10mm2 SWA
cable from one end of the garden to the other end via a 2 feet deep
trench.

WHats the minimum separation distance required between the blue MDPE
pipe and the 10mm2 SWA cable?

Regards,


A spades width:-)

Or put the water pipe in at 750mm and the SWA in at 400mm.

And I have loads of underground electrical warning tape if you want
some, just email me.



So the digger's bucket should be wide enough then if I put the blue
MDPE in one of the bottom corner edges and the SWA in the opposite
corner edges then.......


Yes.

One thing that is annoying about SWA cables is that it only semes to
be available as 3 phase, not in single phase plus earth! So I'm
forced to put sticky coloured tape on the conductors at both ends of
the SWA!

It's not that big a deal:-)

It was on a site I went to at Cambridge. The 110V shower was supplied
from SWA with a green sheath on the [grey] CT of the transformer, the
other green sheath at the shower end was placed on a [black] 110V feed
and connected to ground of course.

It was on that site that I heard one of the most profound, logical
observations that I have ever come across.

The site Electrician explained that the transformer had "lost it's smoke"

He had seen electrical items lose their smoke before, it seems the only
way to get the things working again, is to collect all the smoke that was
lost, and put it back.

The "lost smoke" concept is related to the "Dark Sucker" theory of light
bulbs.

You cannot have a dark sucker theory of light bulbs, the two things
are mutually exclusive.

You can have a dark sucker theory of dark suckers, most of the work
on the theory was indeed written up with the aid of darksuckers, but
having located your dark sucker, it is no longer a theory :-)

AB