Hello all, just fitted a new shower in my parents, the old one has the
copper feed pipe bonded to the earth on the incoming T&E although the
pipework is bonded to a seperate earth "downstream".
The pipewrork is copper up to the inlet of the shower which is
plastic, I dont think it should be bonded to the incoming cable as
well. Am I correct ?.

On 14 Feb 2007 11:20:28 -0800, "Staffbull"
mused:

Am I correct ?.

Nope.
--
Regards,
Stuart.

On Wed, 14 Feb 2007 19:34:54 +0000, Lurch
wrote:

On 14 Feb 2007 11:20:28 -0800, "Staffbull"
mused:

Am I correct ?.

Nope.

That's helpful.
Stuart ( another one ).

On 14 Feb, 19:34, Lurch wrote:
On 14 Feb 2007 11:20:28 -0800, "Staffbull"
mused:

Am I correct ?.

Nope.
--
Regards,
Stuart.

But I thought you were not supposed to bond pipes to the earth on a
supply cable as it could introduce its own fault situation but rather
a dedicated earth clamp run to earth seperatley !!. I'm no electrician
though thats why I asked on here as through this group I managed to
save a small fortune on wiring my extension, no pipe bonding problems
there though, plastic throughout :-)

"Staffbull" wrote in message
ups.com...
Hello all, just fitted a new shower in my parents, the old one has the
copper feed pipe bonded to the earth on the incoming T&E although the
pipework is bonded to a seperate earth "downstream".
The pipewrork is copper up to the inlet of the shower which is
plastic, I dont think it should be bonded to the incoming cable as
well. Am I correct ?.

The Part Pee police from our local council BCO failed the rewire at my mams
because the 10mm T&E cable feeding it (or the earth thereof) wasn't bonded
to the rest of the metalwork in the bathroom. The 15mm copper water pipe
feeding the shower had already been plastered and tiled over at this point,
so I ended up drilling from within the shower casing, through the wall into
the bedroom, dropping a 4mm earth bonding cable down the bedroom wall
(encased in white plastic mini-trunking) and drilling back through the wall
again below the bath level, where I could then clamp it to the copper pipe
(

John.

On 14 Feb 2007 12:55:12 -0800, "Staffbull"
mused:

But I thought you were not supposed to bond pipes to the earth on a
supply cable as it could introduce its own fault situation but rather
a dedicated earth clamp run to earth seperatley !!.

Maybe that was the case some time ago but the current regulations
basically say connect anything metally\earthy together. So all
pipework, baths, rads, protective conductors etc...

I'm no electrician
though thats why I asked on here as through this group I managed to
save a small fortune on wiring my extension, no pipe bonding problems
there though, plastic throughout :-)

You'd be amazed at the amount of earthing problems plastic pipes can
cause.

I think your original query may be mixed up with your recollections on
earthing with plastic pipes. This can be the situation that arises
when supplying a bathroom with plastic pipes.
--
Regards,
Stuart.

"Staffbull" wrote in message
ups.com...
Hello all, just fitted a new shower in my parents, the old one has the
copper feed pipe bonded to the earth on the incoming T&E although the
pipework is bonded to a seperate earth "downstream".
The pipewrork is copper up to the inlet of the shower which is
plastic, I dont think it should be bonded to the incoming cable as
well. Am I correct ?.


http://www.niceic.org.uk/downloads/NL139supp.pdf


--
the_constructor

On Wed, 14 Feb 2007 21:09:00 +0000 someone who may be Lurch
wrote this:-

but the current regulations
basically say connect anything metally\earthy together. So all
pipework, baths, rads, protective conductors etc...

That is what some think. However, that is not what they say. In
particular many metal bits are not likely to introduce a potential
and thus don't need to be bonded.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

On 15 Feb, 07:49, David Hansen
wrote:
On Wed, 14 Feb 2007 21:09:00 +0000 someone who may be Lurch
wrote this:-

but the current regulations
basically say connect anything metally\earthy together. So all
pipework, baths, rads, protective conductors etc...

That is what some think. However, that is not what they say. In
particular many metal bits are not likely to introduce a potential
and thus don't need to be bonded.

--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Cheers, but clear as mud !!, if the incoming pipe is copper up to
inlet of the shower then plastic into the shower does that mean it is
likeley to introduce a potential or not :-(

On 15 Feb 2007 10:09:12 -0800 someone who may be "Staffbull"
wrote this:-

Cheers, but clear as mud !!, if the incoming pipe is copper up to
inlet of the shower then plastic into the shower does that mean it is
likeley to introduce a potential or not :-(

Principles need to be applied in particular circumstances.

It is fairly obvious that a metal pipe entering the bathroom
introduces a potential. It should be bonded to the other metalwork
that it is necessary to bond and bonded to the protective conductors
of all circuits feeding electrical equipment in the bathroom. This
is all clearly stated in the Wiring Regulations.

The intention is that the metalwork that may become energised in a
fault is all at the same potential. Metal window frames, coat hooks,
the little bit of metal in a plughole and so on are not likely to
introduce a potential and so are not bonded.

The bonding may be by reliable metal to metal contact along pipes,
hence it is not necessary to bond every length of pipe and something
like a radiator may well be adequately bonded via the flow and
return pipes (soldered and compression pipe joints are very good
conductors of electricity). However, for the price of not very
little it is as well to bond the pipe to the shower near where it
enters the shower. The bonding cable also needs to go to the cpc of
the circuit feeding the shower, either at the shower terminals or
nearby such as the controlling switch).


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54