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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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    Regulation 643.2 says nothing about DBs



    It's implied - given 314.4 you've got to have a DB between the distribution circuit and the final circuits (OK I could have been clearer that it includes the sub-main as well as the DB and final circuits).


        - Andy.
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  • 0

    Regulation 643.2 says nothing about DBs



    It's implied - given 314.4 you've got to have a DB between the distribution circuit and the final circuits (OK I could have been clearer that it includes the sub-main as well as the DB and final circuits).


        - Andy.
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