Mike Dolt Enterprises
Mike Dolt Enterprises
User: designer82, Location: Boston
Asked on: Friday, December 6, 2024 at 3:21 pm EST
Answered on: Thursday, March 6, 2025 at 5:59 am EST
Question: Can you take a look at elevator section provided by elevator vendor.I believe section 620.51(C)(2) would apply here and a second disconnect switch would be required.Let me know if you agree with this.Thanks
Please provide the elevator section you are referring to. I need to see the relevant details, including the elevator type, control system, location of equipment, and wiring diagrams, to accurately assess whether 620.51(C)(2) applies and a second disconnect switch is required.Once you provide the information, I will analyze it with respect to NEC 620.51(C)(2) and let you know if I agree.
Understanding NEC 620.51(C)(2)
Generally, NEC 620.51(C)(2) covers the requirement for a second disconnect switch for elevators under specific conditions: Location
The elevator machine room or hoistway
Voltage
The voltage of the control circuits*
Circuits involved
Control and Signaling circuits.The purpose of the second disconnect is to de-energize the control and signaling circuits independently from the power circuits for safety during maintenance or emergency situations.
Without the elevator section details, I can only provide a general overview. Please provide the information for a concrete analysis. Flag for review