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Ring Final

With reference to 433.1.204 and cable as installed has min capacity of 20A if protected by a 30A or 32A. If the protective device is reduced to 20A how is the new minimum as installed capacity calculated or arrived at ? I've been looking in the Electrical Installation Design Guide, but the answer is avoiding my eyes.
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  • Former Community Member
    0 Former Community Member
    The design then evolved a bit to allow the slightly smaller metric cable 2.5mm and to permit use of 32 amp MCBs rather than 30 amp fuses. It is all bit empirical, but has a good record in practice.


    But, it has been deemed that there is now a new qualifier in 433.1.204 regarding load distribution in the cable..........


    Regards


    BOD
Reply
  • Former Community Member
    0 Former Community Member
    The design then evolved a bit to allow the slightly smaller metric cable 2.5mm and to permit use of 32 amp MCBs rather than 30 amp fuses. It is all bit empirical, but has a good record in practice.


    But, it has been deemed that there is now a new qualifier in 433.1.204 regarding load distribution in the cable..........


    Regards


    BOD
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