I would greatly appreciate the forum members views on the following, as I would like to give customers accurate advice when finding an unusual number of phase wires in a circuit breaker:
3 phase wires can sometimes be found connected to a circuit breaker on a domestic consumer unit. One way within BS 7671 that this can occur is a spur connected to the ring final circuit at the Consumer unit. P149 OSG.
This does not say fused spur, just spur, so I would expect the maximum of one double socket on this spur. Having said this, if a non-fused spur is allowed, then I see no reason why a fused spur could not also be connected at the consumer unit circuit breaker.
Question 1. Can a fused spur be connected to a ring final circuit circuit breaker at the consumer unit?
Question 2. Are there any other situations where more than 2 phase wires can be connected to a ring final circuit's circuit breaker within BS 7671 regulations?
Question 3. Two or more radial circuits providing lighting can sometimes be found connected to a circuit breaker in a domestic consumer unit. There is clearly the problem of nuisance tripping but is this method of connection contrary to BS 7671?
Kind Regards.
3 phase wires can sometimes be found connected to a circuit breaker on a domestic consumer unit. One way within BS 7671 that this can occur is a spur connected to the ring final circuit at the Consumer unit. P149 OSG.
This does not say fused spur, just spur, so I would expect the maximum of one double socket on this spur. Having said this, if a non-fused spur is allowed, then I see no reason why a fused spur could not also be connected at the consumer unit circuit breaker.
Question 1. Can a fused spur be connected to a ring final circuit circuit breaker at the consumer unit?
Question 2. Are there any other situations where more than 2 phase wires can be connected to a ring final circuit's circuit breaker within BS 7671 regulations?
Question 3. Two or more radial circuits providing lighting can sometimes be found connected to a circuit breaker in a domestic consumer unit. There is clearly the problem of nuisance tripping but is this method of connection contrary to BS 7671?
Kind Regards.