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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 498999" data-attributes="member: 250"><p>If in any doubt with any metal parts, measure their continuity to earth see if it could be extraneous....</p><p></p><p>i.e. Think is it possible for this pipe to introduce an earth potential that could provide a path for a current greater than 30ma in the event of a fault..?</p><p></p><p>e.g. If there was say 4000ohms, (4k), path to electrical earth... Then it has ability to have approx. 60ma fault current!</p><p></p><p>Basic principle of covering your ar5e.... </p><p></p><p>Rather than guess and maybe miss part of the pipe run, where it does actually have some low continuity to earth..</p><p></p><p>If you have measured, it removes any possibility of you being wrong.</p><p></p><p> :coffee </p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 498999, member: 250"] If in any doubt with any metal parts, measure their continuity to earth see if it could be extraneous.... i.e. Think is it possible for this pipe to introduce an earth potential that could provide a path for a current greater than 30ma in the event of a fault..? e.g. If there was say 4000ohms, (4k), path to electrical earth... Then it has ability to have approx. 60ma fault current! Basic principle of covering your ar5e.... Rather than guess and maybe miss part of the pipe run, where it does actually have some low continuity to earth.. If you have measured, it removes any possibility of you being wrong. :coffee [/QUOTE]
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