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Tuesday, October 22, 2019
Question:
A recent outside audit to a financial institution has requested that locks be installed to lock in the open position all exterior A/C disconnect switches. Is this allowed by code?
Robert Cote
A
Answer:
The NEC does not prohibit locking disconnecting means in the open (OFF) position. You didn't mention why the audit identified those circuits as a potential problem but if they are it would make sense to prevent them from being energized until the problem is corrected.