All states have officially have 400v MEN system although we still have 415 in this area.
Can you tell me where the nominal voltage is specified. I assume it is in a standard made enforcable by the National Electricity Rules/Act/Law/Code( insert whichever applicable, there seems to be one of each in existance)?
Is there any legislation making the MEN system mandatory? In Qld it's up to the electricity entity as to what earthing system they use. Some rural areas use the SWER system.
