CIRCUIT BREAKER - Westinghouse double pole circuit breakers are a one inch per pole (2 inch total width) plug-in type I.C. (interchangeable) design for 120/240 volt 3 wire and 240 volt 2 wire residential and commercial applications. These thermal magnetic breakers have a steel frame for consistent calibration throughout the life of the breaker. All breakers have a color-coded handle to assure proper amperage rating and aid in inventory control. Used as a replacement main breaker in any load center which uses IC breakers including Westinghouse load centers with BR and WMB10 prefixes. Can also be used to add a main breaker to S prefix and BR prefix main lug load centers. In this application, this breaker uses 2 full branch spaces.