What position should the disconnecting means be capable of being locked into?

The requirement for the disconnecting means to be capable of being locked into the off position is crucial for ensuring the safety of maintenance personnel and preventing accidental energization of equipment. By allowing the disconnect to be locked in the off position, it provides a means to ensure that power cannot be restored to the equipment while maintenance or service work is being performed. This practice aligns with safety protocols that advocate for lockout/tagout procedures, which are designed to prevent unexpected startup or release of hazardous energy.

Locking the disconnecting means in the off position prevents unauthorized or accidental operation of the equipment during maintenance activities, thereby protecting technicians from potential electrical hazards. This is a fundamental principle in mechanical code practices that emphasizes the safe operation and maintenance of electrical systems and machinery.