Applies to the following stationary equipment for use in nonhazardous locations rated 7200 V or less, single- or 3-phase: - Heat pumps, for heating and cooling; - Air conditioners for cooling; - Cooling portion and associated components of combination heating and cooling equipment; - Liquid chillers; - Condensing units; - Add-on heat pumps for comfort heating or heating and cooling; - Heat pump water heaters and refrigerant desuperheaters; - Fan units and fan coil units for comfort heating and/or comfort cooling; - Room fan heater units; and - Central heating furnaces.