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Two high-power appliances on a single 40A RCD
Former Community Member
I have an electric shower installed on a 40A RCD, in a room adjacent to my kitchen. The shower is only used in an emergency - i.e. when our gas boiler is unable to provide hot water to our main bathroom. I would like to take a spur from this 40A connection to use for a new double oven, which is rated at 32A. Can anyone advise on a safe and legal way to do this, ensuring that only one of the two appliances can be connected at any one time?
Back in the days when all loop testing was carried out at high currents before there were RCDs in the circuits and installation some specifications said that fuses had to be replaced after the loop testing had been completed, because the stress put on them by the loop testing could lead to early failure.
So at one time some fuses such as 5 amp fuses in lighting circuits were considered scrap after having 20 amps whacked across them got a very short period during a loop test.
Circuit protective devices are not indestructible.
Back in the days when all loop testing was carried out at high currents before there were RCDs in the circuits and installation some specifications said that fuses had to be replaced after the loop testing had been completed, because the stress put on them by the loop testing could lead to early failure.
So at one time some fuses such as 5 amp fuses in lighting circuits were considered scrap after having 20 amps whacked across them got a very short period during a loop test.
Circuit protective devices are not indestructible.
