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Best Way to Wire 2 Electric Showers (Same Mains Power Supply, separate building)

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  • 03-08-2020 7:53pm
    #1
    InsulatingTape
    Registered Users Posts: 1 ✭


    Hi All,

    I currently have an electric shower in the house and I am looking to connect another in a chalet, which is approx 50 meters away from the house.

    The chalet is fed from the main board of the house. There is a 3x16 SWA cable coming from the house to feed the chalet.

    What is the best way to wire the 2 showers to allow the feed to automatically switch between both showers as required, but won't allow both showers to come on at the same time?

    I'm aware of the priority/non-priority units but this would need a new cable to go from the house to the chalet which I'm looking to avoid. There is also a risk with an additional cable that if I turn off the main power to the chalet from the house, this cable could still be live in the chalet.
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    #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,536 Mod ✭✭✭✭2011


    The best solution would be to have only one instantaneous shower, not two. This would save the other issue that I suspect you have which is that the 3 x 16 mm sq. cable is undersized. A careful calculation should be carried out to verify this.

    Assuming that was not possible I can not think of a reliable way to resolve this without installing a new cable between the main board and the chalet. I would suggest a solution that uses current sensing relays that allows interlocking of a contractor for each shower unit. This solution would require an ELV signal between boards.


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