Square D EZ Meter-Pak main devices are available as main circuit breakers, main fusible switches, or main lug terminal boxes. EZM main circuit breaker provides circuit protection and a main disconnect point suitable for service equipment. This main circuit breaker unit supplies one phase in, one phase out with a three wire configuration. It is rated for 120/240VAC and 1200A. The compartment comes with a closing plate and three-pole PowerPact P 1200A circuit breaker. The compartment has three horizontal 1200A rated busbars. The busbars come with Visi-Tite joint nuts for connections, eliminating the need for torque readings. It is compliant with UL standards and the steel enclosure has a rating of NEMA 3R.