FUSES AND OTHER CUT-OUTS, SWITCHES AND CONTROLLERS
§ 39.231. Accessible and indicating.
Switches, automatic cut-outs, controllers, starting rheostats, auto starters and other control devices shall be readily and safely accessible to authorized persons; they shall be so located or marked when controlling circuits of over 1,320 watts, as sufficiently to indicate their function and the location and character of the equipment controlled by them and whether they are open or closed. They shall be so installed as to minimize the danger of accidental operation. If practicable, they shall be so installed that gravity can not close them; and such switches as close by gravity shall be provided with a proper stop block or latch to prevent accidental closing. Switches controlling emergency lighting circuits, elevator circuits, circuits in theaters, hospital operating rooms, and other circuits, the interruption of which may cause special hazard, shall be arranged so as to be accessible only to authorized persons.
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