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main bonding of water
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<blockquote data-quote="binky" data-source="post: 18980" data-attributes="member: 490"><p>Oh no it won't - water is a <strong>very poor </strong>conductor that's why wet light fittings tend to go sizzle pop, rather than bang flash, and blow the fuse straight away, and even then it only happens because the terminals are only mm apart, not meters.</p><p></p><p>In answer FS is correct you don't know whether there is plastic or copper pipe between boiler and rest of premises. To prove the point you need to do a wander lead test between main earth terminal and exposed pipes around the property. If you find to continuity to earth then do you need a bond at all????</p><p></p><p>But I find it difficult not to bond something, so I work on the principle that as most heating is still copper, and as gas is present which is always(?) copper, and plumbers don't seem to like plastic on hot water close to boiler, you stand more chance of earthing things from here than almost anywhere else in the house, even given some future mods that might isolate sections of pipe.</p><p></p><p>My other reason for bonding at boiler is that it helps comply with 'accessibility for maintenance and inspection' ( never seen a boiler you can't get to so far Pray)</p><p></p><p>I hope that makes sense, but the use of hepco is a bit of a nightmare to which there is no easy answer, other than follow plumbers around putting in earths to different parts of the premises. NO chance:^O:^O:^O</p></blockquote><p></p>
[QUOTE="binky, post: 18980, member: 490"] Oh no it won't - water is a [B]very poor [/B]conductor that's why wet light fittings tend to go sizzle pop, rather than bang flash, and blow the fuse straight away, and even then it only happens because the terminals are only mm apart, not meters. In answer FS is correct you don't know whether there is plastic or copper pipe between boiler and rest of premises. To prove the point you need to do a wander lead test between main earth terminal and exposed pipes around the property. If you find to continuity to earth then do you need a bond at all???? But I find it difficult not to bond something, so I work on the principle that as most heating is still copper, and as gas is present which is always(?) copper, and plumbers don't seem to like plastic on hot water close to boiler, you stand more chance of earthing things from here than almost anywhere else in the house, even given some future mods that might isolate sections of pipe. My other reason for bonding at boiler is that it helps comply with 'accessibility for maintenance and inspection' ( never seen a boiler you can't get to so far Pray) I hope that makes sense, but the use of hepco is a bit of a nightmare to which there is no easy answer, other than follow plumbers around putting in earths to different parts of the premises. NO chance:^O:^O:^O [/QUOTE]
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