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Gas meter earthing
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<blockquote data-quote="Manator" data-source="post: 413749" data-attributes="member: 9561"><p>The regulation is very simple in terms of application. The reason for a continuous connection is that the one cable will still be connected to one or the other when disconnected, for testing or maintenance purposes.</p><p></p><p>If you have (a link) then when disconnected from the first point, no connection to earth will be found at the second.</p><p></p><p>They have never applied a rule that pipes form part of the bonding process, and as such have never been accepted or considered suitable as a bonding link.</p><p></p><p>Yes the pipes do provide a link, but are never relied upon to provide that link, which is why we bond them.</p><p></p><p>Then we have another problem, we are all capable and guilty of introducing a potential when none exists! Water and gas were originally bonded because they had a potential to earth. Modern installation methods utilise plastic pipes and pose no potential to earth but are still bonded at the required distance.</p><p></p><p>Most of us that have been in the game for a while would have come across a gas installer who diligently uses a earth link to change a meter for example. He does not firstly establish a suitable earth, he does not need to, because all he is doing is maintaining the potential between the connections, and preventing any build up of static.</p></blockquote><p></p>
[QUOTE="Manator, post: 413749, member: 9561"] The regulation is very simple in terms of application. The reason for a continuous connection is that the one cable will still be connected to one or the other when disconnected, for testing or maintenance purposes. If you have (a link) then when disconnected from the first point, no connection to earth will be found at the second. They have never applied a rule that pipes form part of the bonding process, and as such have never been accepted or considered suitable as a bonding link. Yes the pipes do provide a link, but are never relied upon to provide that link, which is why we bond them. Then we have another problem, we are all capable and guilty of introducing a potential when none exists! Water and gas were originally bonded because they had a potential to earth. Modern installation methods utilise plastic pipes and pose no potential to earth but are still bonded at the required distance. Most of us that have been in the game for a while would have come across a gas installer who diligently uses a earth link to change a meter for example. He does not firstly establish a suitable earth, he does not need to, because all he is doing is maintaining the potential between the connections, and preventing any build up of static. [/QUOTE]
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