DIY Earthing !!

Golden_Boy · Jun 27, 2013

My dearest Daughter bought the house she was after and I eventually got to look at her Supply arrangement.
YES that is a jubilee clip you see clamping the (undersized) earth to the sheath.. looks a bit "IFFY" but zs is .23 of an ohm..

[ElectriciansForums.net] DIY Earthing !!

GLENNSPARK · Jun 27, 2013

trev said:
Yes Glenn I'm aware of that although I might be inclined to dispute the coding, the comment was more in surprise at the Ze than the clamp. I've seen boatloads like this, and worse.

code i gave Trev was for the clamp....
not the value...

GLENNSPARK · Jun 27, 2013

any RCDs?
if not then any supplementary bonding?

telectrix · Jun 27, 2013

use the adiabatic to calculate the min. size of the earthing conductor. if that comes out at, say, 4mm, then a 6mm or 10mm can't be condemned as undersized.

trev · Jun 27, 2013

Well obviously we're only looking at a picture so can't tell properly but that to me does not look like a secure earth connection so I'm tempted with a 2

GLENNSPARK · Jun 27, 2013

Engineer54 said:
I bet you won't get much of a Ze value out of that connection!!!! That jubilee clips looks to me, as if it's been attached to the PVC sheath of that DNO cable. It certainly doesn't look like any PILC that i've ever seen in the past!!

As for your extremely poor selection of the correct cable earthing clamp to use, i think your right to leave it another electrician. Hopefully, he will know about ''Constant Force'' spring earthing clamps. Not that they would be any good, on what could well be, a concentric or split concentric cable!! lol!! Maybe better to, contact the DNO and ascertain exactly what, if any, earthing system is being supplied to this installation!!

well...
a `quick lift the lid` would make matters clearer...would it not?

GLENNSPARK · Jun 27, 2013

trev said:
Well obviously we're only looking at a picture so can't tell properly but that to me does not look like a secure earth connection so I'm tempted with a 2

i`d look to get a Ze before condemning it Trev...

trev · Jun 27, 2013

Which is exactly why I've wrote the words I have mate but just because it has a good Ze at present it doesn't make it a secure connection does it

GLENNSPARK · Jun 27, 2013

trev said:
Which is exactly why I've wrote the words I have mate but just because it has a good Ze at present it doesn't make it a secure connection does it

well what we have here is duty of care & ensuring the install was good for continued service at the time of inspection & testing.....

- - - Updated - - -

its not one V the other...

Golden_Boy · Jun 27, 2013

This installation doesnt look like its been touched for ages ( other than the plug in MCB and the meter ) )
As I said its down to the Sparks on site to decide what to do about it, I am 100 miles away!

telectrix · Jun 27, 2013

i'd cut it and give it a C1. :28:

Engineer54 · Jun 27, 2013

If that was a PILC cable, the cut-out will be pitch filled, with a seal around the cable as it enters the cut-out. I can't see any form of sealing around the cable. Anyway, if that cables outer sheath isn't lead, you'll not be getting any Ze value.

Geordie Spark · Jun 27, 2013

GLENNSPARK said:
excactly...
whats this `thing` that some in here have with the adiabatic?

Some of us can't spell the word !!

Knobhead · Jun 28, 2013

The cable could be Jute covered PILC, but I need to see lower down the cable. There will be a point where the jute ends with copper whipping.

As for sealing a PILC without compound?
It’s easy if you have resin impregnated cotton tape. (I’m down to my last ½ roll).
There is the modern cheats method with H/S tube and a boot.