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Needing to meet mcb zs with ln loop.
Former Community Member
Where an rcd is relied on for fault protection due to high zs it has been suggested to me that the loop between live Conductors needs to be less than the mcb max zs. I can't find anything on this anywhere but he said he had this confirmed by an niceic assessor. Have I got it wrong ?
So the danger case is a 32A breaker protecting a 100m run of 1mm2 with a single socket at the end of it.
Or a motor, to give a pretty frequent example where OL is at the load end, and the protection needs to deal with inrush current and still provide protection from short circuit to the supply cable
So the danger case is a 32A breaker protecting a 100m run of 1mm2 with a single socket at the end of it.
Or a motor, to give a pretty frequent example where OL is at the load end, and the protection needs to deal with inrush current and still provide protection from short circuit to the supply cable
