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Two high-power appliances on a single 40A RCD

Former Community Member
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?
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    If I did a site  survey I would assess:
    • The size of the shower cable.

    • The installation method of the shower cable.

    • The kW rating of the shower.

    • The kW rating of the double oven.

    • If the manufacturers instructions state that it needs a 32 amp MCB when the oven cannot draw more than 20 amps.


    Then I would determine if the largest possible current that can be drawn on the circuit is 57 amps and go from there.


    Andy Betteridge 


Reply
  • 0
    If I did a site  survey I would assess:
    • The size of the shower cable.

    • The installation method of the shower cable.

    • The kW rating of the shower.

    • The kW rating of the double oven.

    • If the manufacturers instructions state that it needs a 32 amp MCB when the oven cannot draw more than 20 amps.


    Then I would determine if the largest possible current that can be drawn on the circuit is 57 amps and go from there.


    Andy Betteridge 


Children
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