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100mA RCDs TT system

Nikkid
Afternoon all,

What is the stance on using 100mA RCDs for TT systems now?

I was under the impression that they are no longer required as long as all circuits were protected by a 30mA RCD within the consumer unit (which in this case they will be).

Just looking for some clarity. 


Thanks! 

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    AJJewsbury:


    (As I mentioned before, personally I don't like that approach. The consequences of a L-PE fault before the first RCD is particularly nasty - imposing a hazardous voltage on the entire installation for a long duration........


       - Andy.

     


    And perhaps someone else’s installation!


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  • 0
    AJJewsbury:


    (As I mentioned before, personally I don't like that approach. The consequences of a L-PE fault before the first RCD is particularly nasty - imposing a hazardous voltage on the entire installation for a long duration........


       - Andy.

     


    And perhaps someone else’s installation!


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