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  1. M

    Underfloor Heating over 13A??

    Thanks everyone for their input on this, multiple mats are being used - if worse comes to worse i can emit 300mm wide mat (manufacturer states that 100mm min gap from walls) also can trim some off each length of each mat. Not had much luck with regards to using power relay (as oppossed to...
  2. M

    Underfloor Heating over 13A??

    as i mentioned earlier "Should also have added that dedicated supply was no go due to construction of house/position of fuse board so local ring utilised".
  3. M

    Underfloor Heating over 13A??

    That's what i plan to do if it pulls more than 13A, won't know for sure untill put clamp meter on when i connect up. Also need to check with manufacturer before fitting mat as calculations done using 160wm2 mats when i may be able to get away with 130wm2 as Amtico flooring being fitted over...
  4. M

    Underfloor Heating over 13A??

    Sorry to confuse, my controller is rated at 16A so no problem. A Contactor could be used to switch load up to say 20A on a 32A mcb as the controller is only rated at 16A so in this type of situation the controller would operate the contactor. It was in this sort of scenario that I was wondering...
  5. M

    Underfloor Heating over 13A??

    Will try that Roger, wanted to cover my bases so have done little research and found 16a in-line fuse holder which I can use in conjunction with 20A dp switch instead of 13a fused spur if load is greater than 13a as controller rated at 16a. With regards to the power relay (for future reference...
  6. M

    Underfloor Heating over 13A??

    The trouble with the contactor option is that it has to be mounted locally, thus every time the heating goes on/off you get a great 'clunk' I'm sure i saw a power relay on a system a couple of years back mounted in a double 48mm dry liner? Should also have added that dedicated supply was no go...
  7. M

    Underfloor Heating over 13A??

    Hi there, I’m looking for some advice regarding underfloor heating. The conservatory is 20.9m2 and total power is 3.344kw. At 230v this gives me a current rating of 14.54A. The controller is rated at 16A, normally I supply controller via 13A switched fused spur but with this increased loading I...

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