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Live disconnected but still getting ~12V

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  • 07-12-2013 10:23pm
    #1
    islanderre
    Registered Users Posts: 714 ✭✭✭


    Evening all,

    House built a few years ago and their is a cable running from the fuse box to a 13A wall spur located upstairs for the provision of a circulating pump for solar at a later date.
    The live @ the fuse box is not connected.

    Today, I put an volt meter across the live and neutral upstairs and am getting 12Volt.

    Can anyone tell me why I am getting 12V here considering the live @ the fusebox is disconnected; I would of thought I should see 0Volts.

    Cheers all.


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    #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,594 Mod ✭✭✭✭2011


    A small voltage on a disconnected cable registering on a volt meter is normal.
    It is due to induction.


  • Options
    #3
    islanderre
    Registered Users Posts: 714 ✭✭✭islanderre


    Fair Play 2011.....

    Was getting a bit spocked about it..... appreciate the reply.

    Islanderre


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    #4
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Yea just induction, or capacitance between live and disconnected circuits, in conjunction with extremely high multimeter imput impedance when in voltage mode.


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