111.103-7—Ventilation stop stations.
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.