Abstract: A modular circuit breaker assembly structured to be disposed within a light pole that includes a housing assembly, a mounting assembly disposed within the housing assembly, a circuit breaker coupled to the mounting assembly, and a plurality of conductors. The light pole has an elongated body with a cavity. Within the light pole cavity is a line conductor and a load conductor, each of which terminate in a coupling device. The modular circuit breaker assembly plurality of conductors include at least one line conductor and at least one load conductor, the modular circuit breaker assembly at least one line conductor and modular circuit breaker assembly at least one load conductor coupled to, and in electrical communication with, the circuit breaker.