Utilisation Categories for Contactors

Current type	Utilisation category	Typical application
ac	AC-1	Non- inductive or weak inductive load, resistance furnaces
	AC-2	Slip-ring motors: starting, disconnecting
	AC-3	Squirrel-cage motors: starting, disconnecting while running*
	AC-4	Squirrel-cage motors: starting, plug breaking reversing, jogging.
	AC-5a	Switching gas-discharge lights
	AC-5b	Switching incandescent lights
	AC-6a	Switching transformers
	AC-6b	Switching capacitor banks
	AC-7a	Weakly inductive load in house hold appliances and similar applications.
	AC-7b	Motor load for house hold devices.
	AC-8a	Switching hermetically sealed refrigerant compressor motors with manual reset of the over load release**
	AC-8b	Switching hermetically sealed refrigerant compressor motors with automatic reset of the over load release**
dc	DC-1	Non-inductive or weakly inductive load, resistance furnaces.
	DC-3	Shunt motors: starting, plug breaking, reversing, jogging, resistance breaking.
	DC-5	Series motors: starting, plug breaking, reversing, jogging, resistance breaking
	DC-6	Switching incandescent lights