46 CFR § 111.105-19
Switches
April 15, 2021
A switch that is explosionproof or flameproof, or that controls any explosionproof or flameproof equipment, under §111.105-9 must have a pole for each ungrounded conductor.
[CGD 94-108, 61 FR 28284, June 4, 1996, as amended by USCG-2016-0498, 82 FR 35091, July 28, 2017]