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Electrical Inspection & Testing Forum
IR on lighting circuit very low
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<blockquote data-quote="kme" data-source="post: 86513" data-attributes="member: 113"><p>Is it covered by an RCD in normal use? A meter reading "close to zero" on insulation range could still be looking at a resistance in the thousands of ohms - no real loading effect.............</p><p></p><p>Thoughts? If you can access any junctions on this cct., try disconnecting parts of the circuit, to determine where the fault lies. It could be old / damaged cable, dampness in a wall behind a switch, overheated cabling at a termination or within a luminaire.</p><p></p><p>Check around the whole circuit - fittings &amp; switches. Don`t rely on the meter - use touch, sight &amp; smell to see if you can spot any "dodgy" areas - then isolate them and test as a seperate part...</p><p></p><p>HTH</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 86513, member: 113"] Is it covered by an RCD in normal use? A meter reading "close to zero" on insulation range could still be looking at a resistance in the thousands of ohms - no real loading effect............. Thoughts? If you can access any junctions on this cct., try disconnecting parts of the circuit, to determine where the fault lies. It could be old / damaged cable, dampness in a wall behind a switch, overheated cabling at a termination or within a luminaire. Check around the whole circuit - fittings & switches. Don`t rely on the meter - use touch, sight & smell to see if you can spot any "dodgy" areas - then isolate them and test as a seperate part... HTH KME [/QUOTE]
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IR on lighting circuit very low
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