053-4 Wyo. Code R. § 75.1103-7
Current through April 27, 2019
The electrical components of each automatic fire sensor and warning device system shall:
(a) Remain functional when the power circuits are deenergized as required by S 75.706; and
(b) Be provided with protection against ignition of methane or coal dust when the electrical power is deenergized as required by S 75.313, but these components shall be permissible or intrinsically safe if installed in a return airway.
053-4 Wyo. Code R. § 75.1103-7