UK Earthing Arrangement

[Tonychitty]

Can anyone help, i had a new combi boiler fitted last year and they used mainly plastic fittings to make there connections, i have attached a photo below my question is where should my 10mm earth bond go , the incoming water pipe is made of lead, do i simply bond the 10mm earth to the incoming water pipe with a suitable clamp and then bridge the plastic plumbing tee to the nearest copper pipe.
any feedback would be mostly appreciated

 

[radiohead]

even though there is a metallic water pipe coming in from the outside, i do have the 10mm eath cable near by should i just connect it anyway.

Pointless above the plastic joint. Nowhere really viable below. If you really think it's necessary clamping it carefully it onto the lead wont do any harm.

 

[ipf]

even though there is a metallic water pipe coming in from the outside, i do have the 10mm eath cable near by should i just connect it anyway.

But the lead incomer's not electrically connected to anything internal.
...and if the plastic T is replaced, it would be bonded anyway (if that's the 10mm you're on about).

 

[Tonychitty]

Pointless above the plastic joint. Nowhere really viable below. If you really think it's necessary clamping it carefully it onto the lead wont do any harm.

is it worth bridging out the plastic tee with a short piece of 10mm so that all other copper in the installation is earthed.
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But the lead incomer's not electrically connected to anything internal.
...and if the plastic T is replaced, it would be bonded anyway (if that's the 10mm you're on about).

as the 10mm is near by is there any arm in connecting it anyway will it make the installation unsafe

 

[telectrix]

if the copper pipes in the propery are not extraneous, they can't introduce an earth potential , so bonding them is pointless. as The Borg say "resistance is futile".

 

[pc1966]

if the copper pipes in the propery are not extraneous, they can't introduce an earth potential , so bonding them is pointless. as The Borg say "resistance is futile".

But the lead pipe is!

 

[telectrix]

so bond the lead pipe. easy sweat a connection to that. even a plumber could do it.

 

[pc1966]

I think that is his question: should the incoming lead pipework be bonded?

Probably the boiler no longer requires bonding, but no point in removing it either. However, the lead pipe, stopcock, and filter are all extraneous parts and accessible to touch so should be bonded.
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Ah, just missed your reply!

 

[Tonychitty]

if the copper pipes in the propery are not extraneous, they can't introduce an earth potential , so bonding them is pointless. as The Borg say "resistance is futile".

but there would be if there was not a plastic tee piece

 

[pc1966]

but there would be if there was not a plastic tee piece

That becomes irrelevant if the incoming pipe is bonded.

 

[Tonychitty]

looks like the plastic has eliminated the need for bonding. the only extraneous metal pipework appears to be the incoming up to the plastic. test any copper to MET. above 22k Ohms, not extraneous. if < a couple ohms, it's bonded elsewhere, e.g. to the gas at the bolier. and what's that torpedo above the stop. is it a filter?

but should the lead pipe up to the plastic tee not be bonded as it can be touched
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so bond the lead pipe. easy sweat a connection to that. even a plumber could do it.

is there no suitable clamps for lead

 

[telectrix]

but should the lead pipe up to the plastic tee not be bonded as it can be touched

strictly speaking, yes, but then can you touch any electrical equipment at the same time?

 

[Tonychitty]

strictly speaking, yes, but then can you touch any electrical equipment at the same time?

there will be a washing machine going there

 

[telectrix]

there will be a washing machine going there

so... unless you pull the machine out and it simultaneously develops an electrical fault whilst you are turning off the water stop cock, at the same time a pink pig is flying past the window, riding on a winged elephant?????

 

[Tonychitty]

so... unless you pull the machine out and it simultaneously develops an electrical fault whilst you are turning off the water stop cock, at the same time a pink pig is flying past the window, riding on a winged elephant?????

i know, my problem is that i dont fully understand in my head what earth actually is i just think everthing needs bonding together and not fully understanding it all, but thanks for your input most appreciated.
i have looked on youtube trying to find earthing for dummies.

 

[Jim_e_Jib]

If the lead pipe supplies drinking water, I'd be inclined to replace it. A length of MDPE pipe and no more worries over bonding or lead contamination