StacksVerified U.S. regulatory reference

46 CFR §111.103-7

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Each power ventilation system stop station must:
  1. (a)Be protected by an enclosure with a glass-paneled door on the front;
  2. (b)Be marked, “In Case of Fire Break Glass and Operate Switch to Stop Ventilation;”
  3. (c)Have the “stop” position of the switch clearly identified;
  4. (d)Have a nameplate that identifies the system controlled; and
  5. (e)Be arranged so that damage to the switch or cable automatically stops the equipment controlled.