46 CFR § 111.05-37
Overcurrent devices
April 15, 2021
(a) A permanently grounded conductor must not have an overcurrent device unless the overcurrent device simultaneously opens each ungrounded conductor of the circuit.
(b) The neutral conductor of the emergency-main switchboard bus-tie must not have a switch or circuit breaker.
[CGD 94-108, 61 FR 28276, June 4, 1996]
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