80a RCD in house

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  • Alfred M
    Bronze Member

    • Feb 2022
    • 130

    #1

    80a RCD in house

    Home installation has 80A Rcd used as main switch. 16mm wired used to top of curcuit breakers busbar. The incoming Swa cable should be ok rated at 91 amps but the 16mm neutral and live wire to the neutral bar and cb busbar is a bit concerning. This dwelling has under floor heating. Should i downgrade the rcd to 63a ok
  • GCE
    Platinum Member

    • Jun 2017
    • 1473

    #2
    80 Amps or a short length of 16sqmm will be within rating
    SANS 10142-1 ED3 table D2a pg 304 - allows for 51m at 80Amp

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