One of the things that the OP is contemplating doing (subject to clarification of the cable installation method) is to change the MCB to a higher-rated one. I think that some would probably argue that such would constitute "creating a new circuit", hence not only requiring 30mA RCD protection (in a bathroom) but also becoming notifiable.Only if you are creating a new circuit, this thread was so mixed up earlier that was the the impression I got of your intention, but now reviewing the thread in a more complete aspect that I understand is not what you are doing.Thanks Gary, is this absolutely necessary?
If the 100mA RCD is (as would most commonly be the case) an installation-wide one in a TT installation, it might be more a question of adding a 30mA RCD to the final circuit in question than of changing the existing one.Changing the RCD to a 30mA might not be required, but it's desirable.
Fair enough. Can you tell us more about the conduit?Thanks John, that makes sense. The isolating switch is currently wall mounted in the airing cupboard, I intend to change this to a ceiling mounted pull cord switch, this should give me enough slack to move the cable out of the insulation if it is there and clamp it to the wall if it isn't already.
How can it be creating a new circuit if all the wiring of the circuit is already there and in use?One of the things that the OP is contemplating doing (subject to clarification of the cable installation method) is to change the MCB to a higher-rated one. I think that some would probably argue that such would constitute "creating a new circuit", hence not only requiring 30mA RCD protection (in a bathroom) but also becoming notifiable.
Don't open that can of worms again!How can it be creating a new circuit if all the wiring of the circuit is already there and in use?One of the things that the OP is contemplating doing (subject to clarification of the cable installation method) is to change the MCB to a higher-rated one. I think that some would probably argue that such would constitute "creating a new circuit", hence not only requiring 30mA RCD protection (in a bathroom) but also becoming notifiable.
See Iggifer's comment on what some people believe.How can it be creating a new circuit if all the wiring of the circuit is already there and in use?
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