Customer's motor equipment must conform with the following requirements:
A. Motors that cannot be safely subjected to full rated voltage on starting or that drive machinery of such a nature that the machinery itself, or the product it handles will not permit the motor to resume normal speed upon restoration of normal supply voltage, shall be equipped with devices that will disconnect them from the line upon failure of supply voltage and that will prevent the automatic reconnection of the motors upon restoration of normal supply voltage.
B. All motors of 1 hp or larger shall be equipped with thermal relays, fuses, or other automatic over-current interrupting devices to disconnect completely such motors from the line as a protection against damage due to overheating.
C. Three-phase motors driving elevators, hoists, tramways, cranes, conveyors, or other equipment, which would create hazard to life in the event of uncontrolled reversal of motor rotation, shall be provided with reverse-phase and open-phase protection to disconnect completely the motors from the line in the event of phase reversal or loss of one phase.
(Ord 695, 2000; Ord. 588, 1991).