Eaton 3MM212R12RLBC Residential Meter Stack - UL Listed

Outdoor meter stack construction delivers durability and weather resistance, reducing service interruptions in outdoor installations. The enclosure accommodates 3MM series multi-metering and 125A sockets, with the fifth jaw included at the 9 o'clock position to simplify wiring layouts and minimize field modifications. Multiple metering with a 1200A bus rating enables simultaneous monitoring of separate circuits, supporting energy management and chargeback for property managers. When paired with standard MCBs, this configuration streamlines panel upgrades and retrofit projects without replacing the entire distribution enclosure. Compact footprint dimensions (12.26 in depth, 41.8 in height, 7.01 in width) fit tight spaces while maintaining accessible socket access. The rugged 57 lb unit offers reliable service in outdoor environments, reducing maintenance frequency. 3-phase in, 1-phase out capability supports common residential and light commercial load profiles, with 120/208 VAC operation. This flexibility reduces the need for separate metering enclosures and speeds up customer installations. Integrated features such as ringless socket design, horn bypass, and 5‑jaw configuration improve wiring reliability and safety. The product is UL Listed for safety compliance, and the catalog notes confirm included hardware and orientation. Compatibility and installation advantages include compatibility with Eaton MCBs and a 9 o'clock fifth jaw, enabling straightforward mounting and future expansion. This translates to lower total cost of ownership and faster time-to-value for energy management projects.