24V T-DT hardwired dimmable power supplies have auto reset protection in case of overload, open circuit, short circuit, or over-temperature. They are compatible with Forward phase or Magnetic Low Voltage dimmers. Dim on high voltage side only.UL Recognized to keep inspectors satisfiedConforms to Class 2 NEC RequirementsCompatible with high-voltage dimming devicesCompatible with sensors and switches39" optional plug-in cable included