What type of switch can be used as the disconnecting means for a 1-phase motor operating at 240 volts?

The appropriate type of switch that can be used as the disconnecting means for a 1-phase motor operating at 240 volts is crucial for ensuring safety and compliance with electrical codes. For a 1-phase motor, the switch must be rated for the voltage and should safely interrupt the current to the motor.

The chosen option indicates that the second type of switch (referred to as II) is suitable for this application. Typically, this switch would likely be a motor disconnect switch or a similar device that meets the operational requirements for this type of motor. It is designed to handle the load conditions of the motor and ensure that the motor can be safely disconnected from the electrical supply for maintenance or in case of an emergency.

In contrast, the first type of switch may not meet the necessary specifications for safely and effectively serving as a disconnecting means for a 1-phase motor at 240 volts. As a result, it would not provide the required assurance against potential electrical hazards, such as failure to properly isolate the motor from the power source.

Hence, the selection of the second type of switch recognizes the importance of using appropriate equipment that aligns with operational safety standards and the required electrical ratings for the application in question.