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Discuss getting 0M ohms L- N on Lighting Circuit and cooker Circuit... in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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iwantmyNVQ

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....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??
 
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oldtimer

just because the cooker is switched off does not mean its isolated I was called out to a job because the domestic appliance guy got a belt because the live inside the switch was welded on plus why did you not disconnect the cable at the switch to prove or disprove your reading
 
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....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??

How did you measure the 0M? If it was through an insulation test then on my tester 0 is shown for anything less than 20K. Measure it using continuity test and see how many ohms you get then!
 
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....but RCD doesn't trip? Surely if it has a short circuit somewhere I shouldn't be able to liven the installation??

An rcd works on L and N imbalance... If there was a short circuit between them it would not affect the rcd... That would be the mcb's job.

More than likely a a load connected. Have you disconnected it from the rcd? Lol!
 

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