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Cable size from the meter to the fuse board

  • 01-03-2013 12:13am
    #1
    bean sause
    Registered Users, Registered Users 2 Posts: 6 ✭


    Doing a small renovation at home and the situation is the meter is 45m from the fuse board. 25m is under ground and then up through the cavity and into the attic and over to the fuse board. Will a 16mmsq swa do or will i have to go to 25mmsq swa ??


Comments

  • #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,641 Mod ✭✭✭✭2011


    bean sause wrote: »
    Doing a small renovation at home and the situation is the meter is 45m from the fuse board. 25m is under ground and then up through the cavity and into the attic and over to the fuse board. Will a 16mmsq swa do or will i have to go to 25mmsq swa ??
    Without doing the calculation I would be confident that a 16sq. would be to small. Perhaps a 25sq. Would also be too small. You need to do the calc. Remember the volt drop to the end of all final circuits can not exceed 4% of the nominal voltage, 230VAC. That means that you will probably not want to exceed a VD of more than 2% to the main DB.


  • #3
    bean sause
    Registered Users, Registered Users 2 Posts: 6 ✭bean sause


    2011 wrote: »
    Without doing the calculation I would be confident that a 16sq. would be to small. Perhaps a 25sq. Would also be too small. You need to do the calc. Remember the volt drop to the end of all final circuits can not exceed 4% of the nominal voltage, 230VAC. That means that you will probably not want to exceed a VD of more than 2% to the main DB.

    humm now im a small bit stuck what is the formula to work this out??


  • #4
    JustRoss23
    Closed Accounts Posts: 1,521 ✭✭✭JustRoss23


    if your an electrician you should no that. if not its best to get one in to do the job mate.


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