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Wire size for video doorbell - advice appreciated

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  • 04-02-2021 9:34pm
    #1
    TGD
    Registered Users Posts: 649 ✭✭✭


    Hi.
    I want to fit a wired Eufy video doorbell and their support has told me that I need a transformer that is "30VA or higher".

    I have a pretty new fusebox so should not have much of a problem changing that (currently 8VA).

    However, the current wire to the door is just about .55mm diamater and I'm not sure if this is adequate. But it's a multi-core cable with lots of wires that are not used so I'm wondering if I should use two or three of these combined. The door is about 15m. from the transformer.

    This is a pic of the wires at the current chime - any advice appreciated.
    .

    542089.jpg


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    #2
    alan4cult
    Registered Users Posts: 1,583 ✭✭✭alan4cult


    What type of transformer have you currently, is it an 8 or an 8-24. A lot of the modern ones will take 24.
    Otherwise you'll need to get an REC in to do a DIN Rail installation of a new transfomer.

    As for doubling up the wires, I think you can but I'm not sure what the regulations are. I would resleeve the cables at least to ensure that you can separate live/neutral. Also you'll need an REC here to connect on the consumer unit end.


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    #3
    KlArmy
    Closed Accounts Posts: 21 ✭KlArmy


    Parallel conductors in final circuits less than 10mm not allowed

    final circuit: a circuit connected directly to current using equipment or socket outlets

    It's allowed I think, wouldn't be checked anyhow by inspectors I think?


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    #4
    KlArmy
    Closed Accounts Posts: 21 ✭KlArmy


    Apart from the VA rating

    I notice that the Garo Tranformers have no overload protection

    Similar Hager transformers have short-circuit and overload protection

    Worth keeping in mind , I've seen a few burnt out


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    #5
    TheChizler
    Registered Users Posts: 9,407 ✭✭✭TheChizler


    alan4cult wrote: »
    As for doubling up the wires, I think you can but I'm not sure what the regulations are. I would resleeve the cables at least to ensure that you can separate live/neutral. Also you'll need an REC here to connect on the consumer unit end.
    Are there even regulations that apply here? We're basically taking data cable voltages. Maybe when they're fixed.

    Anyway those video doorbells are very low current, 1 pair should be fine.


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    #6
    KlArmy
    Closed Accounts Posts: 21 ✭KlArmy


    TheChizler wrote: »
    Are there even regulations that apply here? We're basically taking data cable voltages. Maybe when they're fixed.

    Anyway those video doorbells are very low current, 1 pair should be fine.

    Probably not

    Transformers do burn out especially without in-built protection so there is a potential hazard even at those voltages


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