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Non-conductors don't conduct?! #140487
03/27/04 04:21 AM
03/27/04 04:21 AM
P
pauluk  Offline OP
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
My usual supplier was out of a few urgently needed items yesterday, so I had to go to the nearby B&Q (big DIY store, very similar to HD even down to the orange color scheme).

Here's the entire printed wording on my individually wrapped earth clamp:

Quote
Earth Clamp EC 15/2 - 19749BQ
195mm to fit 35-50mm approx.
For indoor or outdoor use.
Not suitable for use on pipes with non-conductive surfaces.
Accepts earth cables A-E 2.5-16mm2
Not for use on the sheath or armour of a cable.


Ah well -- So much for bonding to the PVC water pipe! [Linked Image] [Linked Image]

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Re: Non-conductors don't conduct?! #140488
03/27/04 04:43 AM
03/27/04 04:43 AM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Yes that's a good one Paul.
Just how do you bond those PVC pipes?. [Linked Image]

Re: Non-conductors don't conduct?! #140489
03/27/04 09:21 AM
03/27/04 09:21 AM
G
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Geeeez,
I thought YOU two were better than that.

WITH A PLASTIC BOND BUSHING!!!!!!!!!!1

Re: Non-conductors don't conduct?! #140490
03/27/04 11:31 AM
03/27/04 11:31 AM
C
C-H  Offline
Member
Joined: Sep 2002
Posts: 1,497
Stockholm, Sweden
Don't they mean a painted surface?

Re: Non-conductors don't conduct?! #140491
03/27/04 12:22 PM
03/27/04 12:22 PM
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,890
NY, USA
[Linked Image]
Quote
Don't they mean a painted surface?
C-H, You might have it there.

Does it have a smooth contact area Paul?
Or 'teeth' that might dig in?

Bill

Re: Non-conductors don't conduct?! #140492
03/27/04 03:16 PM
03/27/04 03:16 PM
D
djk  Offline
Member
Joined: Dec 2002
Posts: 1,237
Ireland
It seems that plastic, not necessarily PVC, pipes are being used absolutely everywhere in domestic installations here for both hot and cold water systems.

This house is still fully plumbed in copper. It'll be interesting to see how well the plastic actually lasts

Plastic water mains and cold water systems have been common for quite a long time though and I've never seen them give any problem.

These plastic piping systems make plumbing more like wiring. No more bending copper pipes [Linked Image]

[This message has been edited by djk (edited 03-27-2004).]

Re: Non-conductors don't conduct?! #140493
03/28/04 03:33 AM
03/28/04 03:33 AM
P
pauluk  Offline OP
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Good point about painted pipes -- Maybe that's what they're trying to warn against.

The typical British pipe clamp has a saddle and a metal strap, like this:

[Linked Image]

Re: Non-conductors don't conduct?! #140494
03/29/04 04:32 PM
03/29/04 04:32 PM
C
classicsat  Offline
Member
Joined: Nov 2002
Posts: 456
Polyethylene (I am sure that is what we use here), works well for us, and lasts quite a long time.

Re: Non-conductors don't conduct?! #140495
03/29/04 04:40 PM
03/29/04 04:40 PM
S
sanUK  Offline
Member
Joined: Jan 2003
Posts: 45
Scotland
Have you seen the new type of earth clamp made by MEM ?

[Linked Image]

Looks a bit ropey to me but the 2 field reports Here say different, might look into getting a couple, and give them a try.

Re: Non-conductors don't conduct?! #140496
03/30/04 03:36 AM
03/30/04 03:36 AM
P
pauluk  Offline OP
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
San,

No, I haven't seen those before.

Quote
The sample clamps had been received by our electricians with some suspicion and apprehension

That's my initial reaction on seeing them. My first inclination is to categorize these along with "push-wired" receptacle terminals and such like.

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