Specially designed for easy installation, Eaton's BR load centers house the branch circuit breakers and the wiring required to distribute power to individual circuits. The panels serve as main breaker for service entrances. The main breaker protects the main entire panel and can be used as a service disconnect. The branch breakers protect the wires leading to individual electrical loads such as fixtures and outlets. The BR1020B100RF is a 100 amp main breaker with 10 spaces and 20 circuits.