To Trumpy: I think I said that our highest total load never exceeds about 40 amps there are usually 2 of us in the house and that load is only if one of us is showering and the ovens on and a few lights and other small items so yes we could live with a 63 amp feed however if we had a full size family with several people all with TVs and lighting on it might be pushing it.AutoTap changing is normally only on the 33/11 Kv tranny the local poletop trannys out in the sticks are usually offload changing by manual switches maybe NZ practice is alittle different. Whatever system you got as long as it works it don't matter if its 3 or 1 phase.
