Would you loop of an existing immersion heater spur for a new central heating spur or, would you run a seperate supply?
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Discuss Immersion heater and central heating on same circuit? in the Electrical Forum area at ElectriciansForums.net
It was usual in the 60s to fit a small square 20A DP sw.I have never seen an Immersion on anything other than a SFS. It is after all a 13 Amp fuse, surely theres a reason that all imm heaters draw almost exactly 13 amps