A circuit breaker includes a housing and a line strap at least partially disposed within the housing. The line strap has a top surface and an opposing bottom surface, a first side surface and an opposing second side surface. A line strap insulator is positioned within the housing and has a first sidewall and a second sidewall. Each of the first sidewall and the second sidewall extend from a point above the line strap top surface to a point below the line strap bottom surface. The line strap insulator is fabricated from an electrically insulative material.