Today I visited a friends flat (cos he is overseas) to check on a completely new (from scratch) combo boiler installation. All works okay. It I am concerned over the legality of the wiring connection. The boiler is in the kitchen and the plumber has simply put a plug on the end of the cable and plugged it into one of the double sockets on the kitchen work top. I would have thought it requires a seperate fused supply (similar to a cooker). Am I correct?