A special sensing coil in some manual motor starters verifies what?

In manual motor starters, a special sensing coil is designed to verify the presence of incoming voltage. This sensing coil plays a crucial role in ensuring the system is ready for operation before engaging the motor. By detecting whether the voltage is supplied to the starter, it guarantees that the motor will receive the necessary electrical power when it is activated.

This verification helps to eliminate potential issues such as attempting to start a motor with no power, which could lead to operational failures or damage. The presence of voltage indicates that the electrical supply is intact and the equipment can function safely according to its design parameters.

Other options, while relevant to motor control and operation, do not pertain to the specific function of the sensing coil in this context. Maintaining awareness of voltage presence is foundational for safe motor operation.