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Minimum values of insulation resistance

Wombat
What is the science behind the 1 MOhm minimum insulation resistance? What is the basis for this particular value?
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    mapj1:

    Is an NE fault immedately dangerous, potentially dangerous, or just extremely annoying if it causes nuisance tripping ?




    I would say 'potentially dangerous' in that it needs a second fault (possibly two further faults) to be dangerous. However it is still a fault that should be rectified, particularly as it can give rise to a problem that may not be protected against..

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  • 0

    mapj1:

    Is an NE fault immedately dangerous, potentially dangerous, or just extremely annoying if it causes nuisance tripping ?




    I would say 'potentially dangerous' in that it needs a second fault (possibly two further faults) to be dangerous. However it is still a fault that should be rectified, particularly as it can give rise to a problem that may not be protected against..

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