OK, faffed about now running my earth bonding cable from the gas meter
in the cellar to the CU elsewhere.

Just need to finish the connections. The connection to the gas meter is
with lead pipe, converting to iron just within 600mm of the meter.

There are some suggestions on the web that you shouldn't bond to lead
pipe with a standard clamp. Presumably the idea is that the pipe may
squash? Though my experience with lead water pipe is that the stuff is
so thick that tightening an earth clamp isn't going to have any impact
on the pipe.

Alternatively each end of the pipe is swaged onto either a brass stubb
at the meter or a iron (I presume) stub at the other end. I could bond
there or just at the beginning of the iron pipe.

Any comments? or am I just being a fusspot :-)
--
Chris French

chris French wrote:

[...]
Just need to finish the connections. The connection to the gas meter is
with lead pipe, converting to iron just within 600mm of the meter.

There are some suggestions on the web that you shouldn't bond to lead
pipe with a standard clamp. Presumably the idea is that the pipe may
squash? Though my experience with lead water pipe is that the stuff is
so thick that tightening an earth clamp isn't going to have any impact
on the pipe.
[...]

Any comments? or am I just being a fusspot :-)

On-site guide, page 29, Table 4.2, note (iii) answers your questions, I
think:

"Where practicable the connection to the gas [etc.] service should be
within 600 mm of the service meter, or the point of entry to the
building if the service meter is external and must be on the consumer's
side, before any branch pipework and after any insulating section in the
service. The connection must be made to hard pipework, not to soft or
flexible meter connections."

--
Andy

In message , Andy Wade
writes
chris French wrote:
[...]
Just need to finish the connections. The connection to the gas meter
is with lead pipe, converting to iron just within 600mm of the meter.
There are some suggestions on the web that you shouldn't bond to
lead pipe with a standard clamp. Presumably the idea is that the pipe
may squash? Though my experience with lead water pipe is that the
stuff is so thick that tightening an earth clamp isn't going to have
any impact on the pipe.
[...]
Any comments? or am I just being a fusspot :-)

On-site guide, page 29, Table 4.2, note (iii) answers your questions, I
think:

"Where practicable the connection to the gas [etc.] service should be
within 600 mm of the service meter, or the point of entry to the
building if the service meter is external and must be on the consumer's
side, before any branch pipework and after any insulating section in
the service. The connection must be made to hard pipework, not to soft
or flexible meter connections."


Ah, thanks Andy. I did look in the OSG but must have not read it
properly.

Taking it to mean Lead = soft I'll make the connection I think to the
brass stub by the meter. Seems to be a better prospect than clamping
round a bit of iron pipe in damp cellar.
--
Chris French

chris French
wibbled on Tuesday 04 May 2010 23:39


OK, faffed about now running my earth bonding cable from the gas meter
in the cellar to the CU elsewhere.

Just need to finish the connections. The connection to the gas meter is
with lead pipe, converting to iron just within 600mm of the meter.

There are some suggestions on the web that you shouldn't bond to lead
pipe with a standard clamp. Presumably the idea is that the pipe may
squash? Though my experience with lead water pipe is that the stuff is
so thick that tightening an earth clamp isn't going to have any impact
on the pipe.

Clamp to the iron pipe? That's what I'd do, assuming that's on your side,
not the street side.


Alternatively each end of the pipe is swaged onto either a brass stubb
at the meter or a iron (I presume) stub at the other end. I could bond
there or just at the beginning of the iron pipe.

Any comments? or am I just being a fusspot :-)

--
Tim Watts

Managers, politicians and environmentalists: Nature's carbon buffer.

Tim Watts wrote:

Clamp to the iron pipe? That's what I'd do, assuming that's on your side,
not the street side.

Seconded. Don't worry about going a few cm beyond the recommended 600
mm distance - "where practicable" covers that. Use an EC15 or EC16
earth clamp, not the EC14 which is for dry indoor conditions only.

--
Andy