(a) Fire suppression systems using water or liquid chemical to protect attended equipment shall:
(b) Water supplies for fire suppression devices installed on underground equipment may be maintained in mounted water tanks or by connection to water mains. Such water supplies shall be continuously connected to the fire suppression device whenever the equipment is connected to a power source, except for a reasonable time for changing hose connections to hydrants while the machine is stopped in a ventilated passageway.
053-4 Wyo. Code R. § 75.1107-8