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Electrical Inspection & Testing Forum
Unexpected Reading Between Earth And Neutral
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<blockquote data-quote="apprentice87" data-source="post: 383015" data-attributes="member: 13534"><p>As Andy said, testing with the CPC disconnected will not tell you much. I do it on things like SWA before i install it, [would not be nice to install loads of that stuff and then find it was faulty] and i do it as part of the dead tests i do, mainly to check it is not all going to explode when i power it up [in case i have made an error in the wiring, better safe than sorry]</p><p></p><p>BUT, i always test again with the CPC connected, as then, you will detect faults between your conductors and earth as Andy said. How else you going to do this unless the CPC is connected. Be like trying to measure the voltage of a 9v battery, but by only touching the one terminal... Not going to work!!</p><p></p><p>john...</p></blockquote><p></p>
[QUOTE="apprentice87, post: 383015, member: 13534"] As Andy said, testing with the CPC disconnected will not tell you much. I do it on things like SWA before i install it, [would not be nice to install loads of that stuff and then find it was faulty] and i do it as part of the dead tests i do, mainly to check it is not all going to explode when i power it up [in case i have made an error in the wiring, better safe than sorry] BUT, i always test again with the CPC connected, as then, you will detect faults between your conductors and earth as Andy said. How else you going to do this unless the CPC is connected. Be like trying to measure the voltage of a 9v battery, but by only touching the one terminal... Not going to work!! john... [/QUOTE]
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