What should be provided to manually disconnect the control circuit?

The requirement for a means to manually disconnect the control circuit that is capable of being locked in the off position is essential for safety and maintenance. This capability allows maintenance personnel to ensure that the circuit is not accidentally re-energized while they are working on the equipment. By allowing the circuit to be locked off, it protects workers from the hazards of electrical shock or unintended equipment operation.

This method conforms with safety standards, which mandate that a reliable means of disconnection is readily accessible and can be secured against unauthorized reactivation. The need for lockable disconnection promotes a systematic approach to safety protocols, such as Lockout/Tagout (LOTO) procedures, which are critical in mechanical and electrical maintenance scenarios.

Other options, while they may play a role in circuit operation or control, do not provide the same level of safety assurance. An automatic switch may facilitate control but lacks the manual safety aspect, a control panel reset provides no protection during maintenance, and remote access control introduces risks of unintentional activation from a distance. Thus, the requirement for a lockable disconnection means is the most appropriate and secure method for managing control circuits.