I've been handed a card by the National Grid stating that the earth bonding
on my gas pipe does not comply with regs. It seems that where the bonding
clamp is attached to the gas pipe, and connected to earth on my consumer
unit, is too far from the gas meter. The bonding clamp, apparently, should
be on the gas pipe no further than 600mm from the meter.
I'm a bit puzzled by this. Why should it make a difference if the earth
bonding clamp is attached to the gas pipe close to the meter - or (in my
case) about ten feet away? Surely, as long as the earth bonding clamp is
clamped onto the pipe it shouldn't matter how far it is from the meter - the
earthing continuity is there through the pipe.
There's no real problem - I'm just going to have to move the clamp and buy
about 15 feet of earthing cable - but I'm puzzled as to why it should be
necessary to do this.
I agree with you in principle but, presumably, there is a distance
What I'm replying for though is to point out that the bonding cable
must be a single piece with no joins. I'm not sure if your "about 15
feet" takes account of this.
Ah - I had intended to leave the existing bonding clamp in place - and
simply link that to another bonding clamp located within the 600 mm range of
the meter. I take it that I cannot do that then?
Crimping or soldering both count as unbroken ie you would need to cut the
10mm cable with snips to break its continuity.
The reason an extension from another clamp is not allowed is that anyone
with a screwdriver can just remove the clamp, eg a plumber replacing some
That sounds sensible. I'll just remove the existing clamp and move it to
within 600 mm of the meter - and then attach a fresh length of cable and
either crimp or solder it onto the 'tail' left after removal of the clamp
from its original position.
Is the meter external?
If so then the bonding should be done within 600mm of the point of entry to
To make matters worse there should be no tees or branches before the bonding
I am confused. what is the bonding for? I have bonding fixed to my water
pipes, is that for the same thing? Has all this got anything to do with a
copper spike and a piece of copper strip that goes up the wall to somewhere.
On Tue, 3 Feb 2009 14:57:22 -0000, "Ret." <xxx> wrote:
A subsidary question - my gas meter is on the outside of the front
wall in a plastic box. The incoming gas pipe runs through the wall and
then for about 30ft underneath the suspended timber ground floor
before popping up in the kitchen. So where should it be bonded, where
it first appears inside the kitchen, or by the wall in the underfloor
space where it first enters the house (but of course will not be
I would bond the gas pipe inside the meter box.
The bonding connection at the point of entry to the building is not
accessible for inspection in your case and the point where the pipe become
visible in the kitchen is more than 600mm from the point of entry.
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