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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?
4000 Watts divided by 240 volts = 16.7 amps, if you divide be 230 it comes out at 17 .4 amps.
It doesn't work like that.
If you are going to use 230V for design then it will be 16A - surprise.
At 250V, it will be 17.4A so perhaps one should allow for that just in case.
If you look at a selection of double ovens you will find the manufacturers rating stated as required for the fuse or MCB doesn’t tally with the actual ratings they give for the ovens.
There aren't that many fuse/MCB ratings to choose from and no reason why a manufacturer should specify one anyway.
Most (single) oven instructions state that a 16A supply is required (even if the actual amperage is lower) because that is the rating of circuits they have in Europe.
Presumably a double oven states 32A for the same reason - i.e. two circuits except in Britain.
4000 Watts divided by 240 volts = 16.7 amps, if you divide be 230 it comes out at 17 .4 amps.
It doesn't work like that.
If you are going to use 230V for design then it will be 16A - surprise.
At 250V, it will be 17.4A so perhaps one should allow for that just in case.
If you look at a selection of double ovens you will find the manufacturers rating stated as required for the fuse or MCB doesn’t tally with the actual ratings they give for the ovens.
There aren't that many fuse/MCB ratings to choose from and no reason why a manufacturer should specify one anyway.
Most (single) oven instructions state that a 16A supply is required (even if the actual amperage is lower) because that is the rating of circuits they have in Europe.
Presumably a double oven states 32A for the same reason - i.e. two circuits except in Britain.
