Disconnect switch is a two or three pole switch mounted in an enclosure. It is basically a convenient, easy and safe means of disconnecting power from the equipment for servicing and testing the equipment or for safety purposes. The switch can be purchased with or without space for fuses. Disconnect switches can be purchased for heavy duty and general duty. The heavy duty disconnect switch would be installed for equipment requiring frequent switching. The general duty disconnect switch would be used for equipment requiring infrequent switching.