i have recently questioned a corgi registered plumber who fitted a combi boiler in a loft,his heating engineer (so called spark) has installed the supply to the boiler via the programmer which is downstairs, i have already disconnected this supply as it was a 1.0mm cable protected by a 32a mcb!,i always take a supply to the boilers terminations first (via a sw/f spur or 3 pin plug) then away from the boilers pcb if i fit any external controls ie thermostat,programmer. can anyone confirm to me that by doubling up the supply at the programmer then to the boiler is wrong as i think it is because of the length of flex being over 2 meters?
thanks
thanks