Electrical Controls The UL Listed Electrical Control Panels are available in single phase, three phase, and mixed voltage configurations in various sizes with three mounting location options. The panels include color coded wiring with wiring diagrams, and spare terminals controlled by the fire system micro switch. Factory pre-wired to shut down supply fans in a fire condition. Factory pre-wire option to turn on the exhaust fans in a fire condition (if required). Red pilot light fan switches illuminates when the switch is in the on position. Panel is UL Listed for installation in the integral Utility Cabinet. There are numerous other options available