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    Andy


    Thanks for your comments.


    536.4.202 says you can apply diversity when considering the rating of the bus bar and the RCCB. I an guessing that the last sentence in the Regulation is causing the confusion as it says you cannot rely on diversity alone for the rating of the RCCB and switches but also follow the manufacturers instructions. I think this is a repeat of 134.1.1. As manufacturers dispatch fully loaded consumer units with 100A switches and 63A RCCBs without any warning about upstream ratings of circuit protection in their data sheets inside the box it is not an issue. That said I would ask the manufacturers technical help line if in doubt.


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  • 0
    Andy


    Thanks for your comments.


    536.4.202 says you can apply diversity when considering the rating of the bus bar and the RCCB. I an guessing that the last sentence in the Regulation is causing the confusion as it says you cannot rely on diversity alone for the rating of the RCCB and switches but also follow the manufacturers instructions. I think this is a repeat of 134.1.1. As manufacturers dispatch fully loaded consumer units with 100A switches and 63A RCCBs without any warning about upstream ratings of circuit protection in their data sheets inside the box it is not an issue. That said I would ask the manufacturers technical help line if in doubt.


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