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RCD socket outlet.

Former Community Member
Former Community Member
Hi all,
Any comments on this one most welcome!
A customer wants me to replace an existing one gang 13 amp socket outlet with a double.
The problem is that there's no rcd protection there, so i'm thinking that as I am in effect adding a socket outlet I should fit an rcd protected one?
If I were replacing like for like it wouldn't bother me at all but the fact it's going to be a double makes me think an rcd protected one is the thing to do, just seems a bit ott to fit one rcd protected socket when there are probably 20 others that aren't rcd'd!
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    Sparkingchip:



    Maybe the saving grace is that bonding is more effective in reducing touch voltages in TT installations than in TN installations.


     Andy Betteridge 


     




    Well, that's only partly true. Bonding only works to reduce the touch voltage for TT within either:


    (a) a notional "zone of influence of the earth electrode",


    or


    (b) within what we used to call the "equipotential zone" of the bonding system.



    In all other cases, the touch voltage in a TT system may well approach U0. This might even include indoors in certain situations where the bonding doesn't control the touch voltage - but almost certainly includes most situations outdoors at distances above 3 m from the earth electrode or buried extraneous-conductive-parts (depending on the type and composition of the electrode or extraneous-conductive-part of course) ... and I think this is the answer to your question regarding 25 V touch voltage for construction sites - not practicable?


     

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  • 0

    Sparkingchip:



    Maybe the saving grace is that bonding is more effective in reducing touch voltages in TT installations than in TN installations.


     Andy Betteridge 


     




    Well, that's only partly true. Bonding only works to reduce the touch voltage for TT within either:


    (a) a notional "zone of influence of the earth electrode",


    or


    (b) within what we used to call the "equipotential zone" of the bonding system.



    In all other cases, the touch voltage in a TT system may well approach U0. This might even include indoors in certain situations where the bonding doesn't control the touch voltage - but almost certainly includes most situations outdoors at distances above 3 m from the earth electrode or buried extraneous-conductive-parts (depending on the type and composition of the electrode or extraneous-conductive-part of course) ... and I think this is the answer to your question regarding 25 V touch voltage for construction sites - not practicable?


     

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