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R.C.B.O. Preference.

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Q. Why do I prefer the modern Niglon R.C.B.O. design over the modern Lewden R.C.B.O. design for domestic consumer units?


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    ARE:

    Re Colin Haggett    Concur.  Why would you NOT prefer a Double Pole RCBO particularly with a TT supply through 2 overhead cables?  With or without an SPD the overvoltage (from the lightning strike) is just as likely to come down the neutral line as the phase line..

    ARE


    Lost me here, am fitting DP RCBOs and it’s nothing to do with lightning but has more to do with TT supply’s with upfront time delay RCD.


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  • 0
    ARE:

    Re Colin Haggett    Concur.  Why would you NOT prefer a Double Pole RCBO particularly with a TT supply through 2 overhead cables?  With or without an SPD the overvoltage (from the lightning strike) is just as likely to come down the neutral line as the phase line..

    ARE


    Lost me here, am fitting DP RCBOs and it’s nothing to do with lightning but has more to do with TT supply’s with upfront time delay RCD.


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