In a new home we had specified all electrical circuits were to have RCDs on them. The electrician has installed the distribution board and installed RCDs. However when we quizzed them to make sure the RCDs were on all circuits, they said that all circuits that need to be on RCDs, were on RCDs. However they said hadn't installed RCDs on the following circuits, Hobbs, Oven, Hot water cylinders, Heatpumps etc. This is because they say that those circuits will encounter 'nuisance tripping'.
Does anyone know how common nuisance tripping would be on a new home with all new appliances etc?. I have read that nuisance tripping can occur on old appliances, such as old ovens where cobwebs may have gotten in. I notice in Australia they seem to require all circuits in the switchboard to be on RCD's. However in NZ there doesn't appear to be the same requirement yet? It does seem that Australias regulations on this are a lot stricter than in NZ, as in some states it appears you have to get RCDs installed on an existing home before you are allowed to sell it.
Should we insist they do install them on all circuits as it said in the specs? Or is the risk of nuisance tripping too large?. Does anyone have them installed on all circuits, such as ovens, heatpumps etc? I guess if it does cause problems with nuisance tripping, the RCDs could always be removed.