Final answer:
The statement is true, attachment plugs and receptacles can be used as controllers for motors rated at 1/3hp or less. This practice aligns with safety protocols and ensures the motor operates correctly with the proper electrical ratings.
Step-by-step explanation:
The statement that for a portable motor rated at 1/3hp or less, the controller may be permitted to be an attachment plug and receptacle is True. This is in accordance with the safety guidelines for electrical appliances that ensure the correct operation of the device and prevent electrical mishaps. Specifically, a three-hole outlet as described in the referenced figures ensures that a standard three-prong plug is inserted correctly due to its polarized design to maintain a proper function of the three-wire system.
It is important to also note that most electrical appliances are rated in amperes (or amps) required for proper operation, which correlates with the specifications for fuses and circuit breakers that are critical components designed to protect the electrical circuit from damage caused by an overload or short circuit.