Ring Circuits - Fixed Electric Heating

Is the heating all the ring will supply ?  25 amps of heaters could probably be a radial on 4mm though a ring will reduce the volt drop. It rather depends on the layout, run lengths  and what the cable has to route through and group with.

If  anything it may be a bit oversized, for example you cut it in half and had 2 radials each feeding 3kW of heaters, you'd probably think it was OK to use 2.5mm unless the routing/grouping was particularly onerous.

BS7671 has no issue with it, but you do need to design it , rather than wack it in without any thought. If there are other loads as well (you mention 13A sockets) then it is not so clever, as you have used up 24A of your 32A on the heaters alone, so not much left for ironing or the toaster..

Also, how big and draughty is this living room - 6kW is quite a lot for  one room - consider that a gas boiler for heating a whole semi-D house is only 24-36kW and does the hot taps as well.

M.

Is the heating all the ring will supply ?  25 amps of heaters could probably be a radial on 4mm though a ring will reduce the volt drop. It rather depends on the layout, run lengths  and what the cable has to route through and group with.

If  anything it may be a bit oversized, for example you cut it in half and had 2 radials each feeding 3kW of heaters, you'd probably think it was OK to use 2.5mm unless the routing/grouping was particularly onerous.

BS7671 has no issue with it, but you do need to design it , rather than wack it in without any thought. If there are other loads as well (you mention 13A sockets) then it is not so clever, as you have used up 24A of your 32A on the heaters alone, so not much left for ironing or the toaster..

Also, how big and draughty is this living room - 6kW is quite a lot for  one room - consider that a gas boiler for heating a whole semi-D house is only 24-36kW and does the hot taps as well.

M.

If the circuit is dedicated to the electric heaters and supplies no significant other loads then I would say that this is fine.

If the ring final circuit also supplies general purpose socket outlets but ONLY IN THE SAME ROOM then it is probably acceptable since significant other load is unlikely.

If the circuit also supplies other socket outlets in OTHER rooms, then this is not in my view acceptable, since very little capacity is available for heaters or other heavy loading appliances in these other areas.