Square D EZ Meter-Pak main devices are available as main circuit breakers, main fusible switches, or main lug terminal boxes. EZM main lugs terminal boxesprovide connection points for metering configurations. This main lug terminal box connects one phase in, one phase out with a three wire configuration. It is rated for 120/240VAC and main rated current of 400A. It is suitable for underground service feed with conduit entrances at the bottom of the compartment. This terminal box is suitable for use on line or load side of service equipment using the neutral bonding kit provided. The compartment has three horizontal 800A 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.