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  • Users: bluenose72
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  1. bluenose72

    Substation Earthing

    Any advice where I can source (BS's/Standards etc) the earth value of a sub-station. My thoughts are that it should be less than 1 ohm, but getting conflicting reports that it can be up to 5 ohms??? Also being advised that a common earth can be used, being linked between sub-stations. Surely...
  2. bluenose72

    Cable Insulation Resitance

    I am specifying the testing of installed cabling, and once this is complete it will obviously have to be tested. How do I determine what setting I should select on my megger i.e. 250V, 500V, 1000V ???

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