Alternating Current Machines 5

The document discusses wiring rules and supply authority requirements regarding motor starting restrictions. It states that due to high starting currents of large motors, supply authorities set limits on these currents to reduce strain on the system and disturbances to other customers. It provides specifics on limiting starting currents to 45A for single phase 240V motors, and provides an equation for calculating limits for 415V motors based on the continuous output of the motor. It also discusses AS/NZ 3000 requirements for overload protection on motors exceeding 0.37kW and references sections on overtemperature protection and motors used in special situations like refrigeration rooms and fire pumps.