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.
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..........
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..........
