This electrical code has a section, 110.25, that addresses lockable disconnecting means and requires that where a disconnecting means is required by the electrical code, the lockable disconnecting means has to be capable of being locked in the open position. In addition, the locking means must remain in place even when the lock is not installed.
Example sections where a disconnecting means is required to be lockable, include but are not limited to the following: Please note that the 2023, 2026 and future editions of the electrical code have seen alot of changes and moving of articles and sections. Keep your eye on this. the following is applicable based not he 2023 edition of the electrical code.
225.25 for outdoor lamps, 235.352 for medium voltage feeders in the 2023 electrical code which was moved to a new Article 266 for the 2026 edition of the electrical code, 410.141 for medium voltage electric-discharge lighting, 422.31 for the disconnection of appliances that are permanently connected, 426.51 for fixed outdoor electric deicing and snow melting equipment. 430.102 for motors, 430.113 for motors with more than one energy source, 450.14 for specific transformers, 495.44 for medium voltage fused interrupter switches, 495.46 for specific medium voltage circuit breakers, 513.13 for maintenance and servicing of dispensing equipment, 600.6 for signs and outline lighting, 647.8 for lighting equipment, 626.22, 626.24 and 626.31 for electrified truck parking spaces, and finally 690.15 for isolating PV equipment.
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