as a practising part p electrician, i needed clarification on a issue i have regarding double sockets that are on a spur off a ring main socket... the rules state that the number of spurs are limited to one off each socket on a ring. what would happen if you plugged in 2 3kw heaters into that spur socket? as this spur is on a single 2.5 cable which is only rated at about 19 amps. the current that the 2 heaters would draw would be 26 amps. now the mcb will not trip but the cable will overheat and surely melt and maybe catch fire. how can you cover yourself from this kind of possibilty? maybe use 4mm cable?
thanks for reading