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 200A. It is suitable for underground and overhead service feed. The compartment has three horizontal 400A rated busbars. The busbars come with Visi-Tite joint nuts for connections, eliminating the need for torque readings. It is supplied with 200A two-pole circuit breakers. It is compliant with UL standards and the steel enclosure has a rating of NEMA 3R.