46 C.F.R. § 111.103-7 Ventilation stop stations.
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Each ventilation stop station must: (a) Be protected by an enclosure with a glass-paneled door on the front; (b) Be marked, “In Case of Fire Break Glass and Operate Switch to Stop Ventilation;” (c) Have the “stop” position of the switch clearly identified; (d) Have a nameplate that identifies the system controlled; and (e) Be arranged so that damage to the switch or cable automatically stops the equipment controlled.
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PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.103—Remote Stopping Systems
§ 111.103-7 Ventilation stop stations.
