Combination (main circuit breaker), single phase entrance indoor type-1 load centre. Adjustable trim for convenient flush levelling. 200 A commercial grade main breaker designed for straight-in wiring, horizontally operated for top feed without modification. 100 A models utilize a reverse fed branch circuit breaker. Single piece, formed, plated aluminium bus bar provides superior conductivity. Maximum wiring space for ease of wiring in compliance with CSA requirements. Contractor friendly knockouts improved knockout configurations include tangential knockouts in top and bottom box ends. Six mounting holes three top, three bottom for ease of installation in vertical, horizontal or inverted positions. Dry wall markings on enclosure notches on outside of box enclosure indicates depth for dry wall. Single keyhole mounting just one keyhole at top and bottom for easier mounting and levelling. Neutral bonding strap pre-attached at factory to eliminate loose parts. Twin neutral design reduces wireway congestion, provides for easier wiring and load balancing. I-beam design for improved durability. Steel back pan provides positive, reliable breaker mounting.