Eaton 3MM312RRLBC residential meter stack - UL Listed
Part Number: 3MM312RRLBC
Quick Summary
Eaton 3MM312RRLBC residential meter stack is a multiple metering assembly designed for outdoor service entrances. Field teams often struggle with space-constrained panels and the need for reliable multi-metering; this stack delivers with a compact footprint and straightforward assembly. UL Listed certification ensures safety and code compliance, while its outdoor-rated housing withstands weather exposure at installation sites. With 125A service capability, 120/208V compatibility, and a configuration that supports three-phase in and single-phase out, it adapts to residential and light commercial projects. By simplifying installation and enabling accurate tenant metering, it reduces field labor and lifecycle costs while aligning with Eaton's warranty and support.
Product Information
Extended Description
3MM312RRLBC Eaton: Eaton 3MM residential meter stack, Multiple metering, 125A, Cu, Bus:800A, Horn bypass, Outdoor, Depends on selected MCB, Five-jaw, Sockets:3, Three-phase in, single-phase out, B-C, BR2_, BRH2_, BRHH2_, BRX2, Ringless, Socket:125A, 120/208V
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM312RRLBC
UPC
782114990735
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
57 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Type
Multiple metering
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM312RRLBC
Selling Policy 25-000 - Distribution and Control Products and Services
Multiple metering is a core feature that enables several meters to be served from one stack, reducing enclosure count and field wiring. The result is lower hardware costs and faster installations for developers and contractors, with immediate benefits in multi-tenant residential buildings and light commercial properties. Outdoor rugged construction ensures weather resilience, minimizing enclosure failures and maintenance cycles for outdoor installations on exterior walls and utility yards. The five-jaw sockets and Cu bus rated at 800A provide high current capacity for scalable metering without upgrading to new enclosures, supporting growth while keeping upfront costs predictable. The 125A service rating and 120/208V operation offer compatibility with common residential feeders and small commercial circuits, simplifying procurement and field configuration. A UL Listed certification underpins code compliance, and the included Eaton warranty reduces lifecycle risk, enabling faster deployment and clearer service expectations for facilities teams.
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FAQs
For outdoor installations, select a protected mounting location and ensure proper weatherproof enclosure clearance. Verify 125A service compatibility, 120/208V operation, and three-phase in with single-phase out configuration. Use the correct MCBs, confirm five-jaw socket compatibility, and follow the Eaton specifications to maintain code compliance and safe phase balance during commissioning.
Key performance specs include 125A service rating, Cu bus with 800A capacity, 120/208V voltage, and a three-phase in / single-phase out configuration. The unit uses five-jaw sockets for versatile metering connections and is intended for outdoor use. These specs support reliable multi-metering for residential and light commercial feeders while maintaining efficient load balancing.
Yes. The Eaton 3MM312RRLBC is designed for multi-tenant residential and light commercial applications requiring multiple metering points in a single enclosure. It reduces enclosure count, simplifies wiring, and accelerates meter deployment. Its outdoor-ready design and 125A service rating align well with typical feeder configurations found in apartment buildings and small office complexes.
The product is UL Listed, indicating conformance to recognized safety standards and alignment with NEC and local electrical codes. This certification helps streamline approvals with inspectors and reduces project risk. Always reference the associated Eaton datasheets for installation guidance and keep documentation on hand for code reviews and warranty eligibility.
Eaton provides a warranty under policy 25-000 that covers one year from installation or eighteen months from shipment, whichever occurs first. This helps minimize lifecycle costs and supports preventive maintenance planning. Additionally, access to Eaton’s technical resources and specification sheets assists with smoother installations and faster problem resolution in the field.