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Is this cable suitable?

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  • 19-05-2022 9:27am
    #1
    good one
    Registered Users Posts: 100 ✭✭


    Hi All,

    I've external power socket at the bottom of my garden.

    It's approximately 50m from the fuse box and on the cable is 3x2.5 which I take is 3 core at 2.5mm2.

    I would like to use it to power a water heater which is 2.05kW.

    Is this cable sufficient or do I need to lay another bigger cable?


    TIA

    goodone



Comments

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    #2
    kirk.
    Registered Users Posts: 4,957 ✭✭✭kirk.


    Prob get it hooked up by a rec if it's ready

    Check your Zl and the volt drop with the heater on



  • Options
    #3
    Andrea B.
    Registered Users Posts: 1,927 ✭✭✭Andrea B.


    https://www.boards.ie/discussion/2058246464/is-this-cable-suitable

    For the info given, i have checked for buried SWA. It is sufficient.



  • Options
    #4
    good one
    Registered Users Posts: 100 ✭✭good one


    Thanks Kirk & Andrea B.

    It's an SWA cable.

    I'm waiting on a Spark to come to wire in the heater so he can check.



    GO



  • Options
    #5
    kirk.
    Registered Users Posts: 4,957 ✭✭✭kirk.



    https://www.reconelectrical.co.uk/image/data/pdfs/R1%20and%20R2%20Values.pdf

    The R1 +R2 seems to be 1.5 ohm for 100m 2.5 SWA

    Think u can add that onto the fault impedance where you connect the swa , they use those methods in the UK afaik , so seems to be marginal for even a B16 which is about 2 ohm max

    Presume u can parallel the armour with the cpc too to bring it down further too

    Volt drop I think is about 10v for the swa itself but it's only a heating load so a few volts probably wouldn't matter



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