6.5.2 Class of Use

A classification system for electric power operated wire rope hoists, which takes into consideration the operating cycles per hour, operating hours per day, magnitude of load and total range of lift, is set out in the standard to which it was made and should be marked on the hoist.

It should be remembered that hoists used frequently for high lifts may approach the limit of their motor rating. The greater the height of lift the longer the motor will run. Incorrect selection can result in extended running times leading to overheating. Single phase hoists are more susceptible to this.