A motor control center having one or more control modules is disclosed. Each control module has a cabinet for enclosing therein a first contact set and a second contact set forming rotatable electricity conducting switches or contacts from the bus bars of the motor control center to a circuit breaker in the control module. An operation handle, extending from the cabinet, is used to operate the control module between different states. The operation handle is coupled to an operating mechanism in the cabinet. The operation handle sequentially operates the first contact set to couple to the bus and power a test circuit, the second contact set to couple the first contact set to the circuit breaker, and lastly to switch on the circuit breaker.