Contactor & Overload Relay:What is the difference between rating usage current and rating conducting current and how should these two be applied?

Rating usage current is a current value applied to AC3 class load and rating conducting current is a current value applied to AC1 class load.

This means that depending on the kinds of the load, electric contactor capacity of the same kind differs. When the using load is cage motor, should be applied with AC3. Please refer to the FAQ for the load distinction of each class.