i've just bought underfloor heating for our toilet and, upon reading the installation instructions, have decided to get someone in to do it. i have a couple of questions that i'd like resolved before i get someone in to see if its feasible otherwise the kit is going on ebay!
firstly, the installation calls for an RCD. if possible i don't want to put in a separate RCD in a box in the toilet, and we have an earth fault detector near the consumer unit. is that an RCD? whats the difference? it is very sensitive and isn't just connected to the sockets - a lightbulb blowing can make it trip.
also it calls for a fused spur coming from an RCD socket. does the socket have to be RCD or is it ok if the circuit is protected somewhere else (at the consumer unit for instance).
i want to put the fused spur in the toilet, about 500mm away from the toilet and just above the floor. the backbox will be the steel type, recessed into the wall. can i do this? it is well away from any plumbing and the toilet is the only plumbing fixture in the room - no basin or owt else.
is there a regulation as to minimum height above the floor it can be? i was thinking about 6 inches.
i'd like to know this as i want to do the positioning and chasing out so i can have things exactly where i want them before i get a spark in. the chasing in will continue above the box to another box about shoulder height for the thermostat.
one final question, when running a spur, must it come from a socket, or is it possible to cut into the loop under the floor, put a 30A junction box in and tee a spur in that way? just redecorated all the rooms, plastered and put nice chrome sockets in - really don't want somebody to hack into the walls to put in a spur!