Yes a 2.5mm2 T&E cable can supply a 7,300 Watt instantaneous water heater at 240 Volts. I came across this today. The supply was from a B32 M.C.B. So why do we use bigger cable than 2.5mm2 if it will do the job?
The run was about 5m maximum.
Z.
Today I found a holiday chalet protected by a B50 M.C.B. and 30mA R.C.D. It has a 30/35 Amp shower. A 1kW bathroom fan heater. Several plug in room heaters. A 30 Amp free standing cooker. A 7kW water heater. Plus lights and other odds and stuff. All supplied through short 6.0mm2 tails showing no signs of overheating.
Z.
Today I found a holiday chalet protected by a B50 M.C.B. and 30mA R.C.D. It has a 30/35 Amp shower. A 1kW bathroom fan heater. Several plug in room heaters. A 30 Amp free standing cooker. A 7kW water heater. Plus lights and other odds and stuff. All supplied through short 6.0mm2 tails showing no signs of overheating.
Z.
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