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Do-It-Yourself (DIY) Question & Answer Forum
minor works testing
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<blockquote data-quote="ProDave" data-source="post: 416583" data-attributes="member: 6969"><p>R1 (the phase conductor) is already isolated by virtue of turning off it's mcb. So remove it from the mcb.</p><p></p><p>R2, the CPC can be disconnected from the earth bar.</p><p></p><p>you now have both conductors you are wanting to test isolated, so what is stopping you from doing your R1+R2 test while the rest of the board remains live? is it just you were taught not to do that?</p><p></p><p>As I said previously depending on the design of the board it may or nay not be safe to access the neutral bar. but if it's a board with good access, and you can positively identify the correct N wire, and it's not sharing a terminal with another circuit, then there is nothing stopping you removing that as well and doing a proper IR test on all conductors of that circuit.</p><p></p><p>Like others have said, go into an office block, with a fully loaded 3 phase board with your objective being to change one broken socket, and see the reaction you get when you say you want to shut off the whole lot...........</p></blockquote><p></p>
[QUOTE="ProDave, post: 416583, member: 6969"] R1 (the phase conductor) is already isolated by virtue of turning off it's mcb. So remove it from the mcb. R2, the CPC can be disconnected from the earth bar. you now have both conductors you are wanting to test isolated, so what is stopping you from doing your R1+R2 test while the rest of the board remains live? is it just you were taught not to do that? As I said previously depending on the design of the board it may or nay not be safe to access the neutral bar. but if it's a board with good access, and you can positively identify the correct N wire, and it's not sharing a terminal with another circuit, then there is nothing stopping you removing that as well and doing a proper IR test on all conductors of that circuit. Like others have said, go into an office block, with a fully loaded 3 phase board with your objective being to change one broken socket, and see the reaction you get when you say you want to shut off the whole lot........... [/QUOTE]
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