Eaton 3MM212RRLBC Residential Meter Stack - UL Listed
Part Number: 3MM212RRLBC
Quick Summary
Eaton 3MM212RRLBC residential meter stack safely consolidates multiple metering for commercial and residential facilities. Engineers and procurement teams often struggle with limited space, wiring complexity, and code compliance when adding submetering to existing electrical systems. UL Listed safety certification supports compliance with recognized standards, and the rugged outdoor enclosure is designed for weather exposure. This solution scales with project needs, offering configurable metering, two sockets, and a fifth jaw included at 9 o'clock to simplify field wiring. Designed for performance and reliability, it supports seamless integration with Eaton metering products and other B-C, BR2_, BRH2_, BRHH2_, BRX2 schemes to optimize ROI.
Product Information
Extended Description
3MM212RRLBC Eaton: Eaton 3MM residential meter stack, Multiple metering, 125A, Cu, Bus:800A, Horn bypass, Outdoor, Depends on selected MCB, 5-jaw, Sockets:2, Three-phase in, single-phase out, B-C, BR2_, BRH2_, BRHH2_, BRX2, Ringless, Socket:125A, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM212RRLBC
UPC
782114990674
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
56 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
Catalog Notes
Fifth jaw included at 9oclock position
Type
Multiple metering
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM212RRLBC
Feature → Business Impact → Application: The 3MM212RRLBC provides true multiple metering in a single, outdoor-ready enclosure, reducing footprint and simplifying wiring logistics for multi-tenant or commercial builds. This translates to faster installation, easier maintenance, and improved energy management workflows in facilities aiming to optimize load profiling and submetering accuracy. Feature → Business Impact → Application: With a 125A service, Cu conductors, and an 800A bus, the stack accommodates higher demand without repeated panel upgrades, enabling building owners to scale metering as occupancy or usage changes. Application: ideal for mid-to-large commercial properties and multi-residential developments seeking robust metering infrastructure that grows with demand. Feature → Business Impact → Application: Outdoor-rated construction and UL Listed certification provide regulatory confidence and long-term reliability in exposed environments, reducing weather-related downtime and service calls. Application: suitable for exterior electrical rooms, carports, or exterior utility enclosures. Feature → Business Impact → Application: The fifth jaw at 9 o'clock and ringless, 2-socket design streamline field wiring and retrofit projects, cutting labor time and minimizing installation errors. Application: common in retrofit metering projects and new builds requiring rapid deployment. Feature → Business Impact → Application: Compatibility with various MCB configurations (depends on selected MCB) supports flexible protection schemes, enabling engineers to tailor the stack to specific feeders and metering strategies. Application: reduces design iterations and accelerates commissioning in complex electrical distributions.
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FAQs
The 3MM212RRLBC is designed for outdoor installations requiring multiple metering in a single enclosure. It supports a 125A service with three-phase in and single-phase out configurations, two sockets, and a fifth jaw at 9 o'clock. Its ringless sockets simplify field wiring while maintaining load distribution flexibility for multi-tenant and commercial applications.
Key specs include a 125A service rating, copper conductors, an 800A bus, and an operating voltage of 120/208Vac. It features two sockets and supports multiple metering configurations with three-phase in and single-phase out. The enclosure is outdoor-rated and UL Listed, with a fifth jaw included for expanded wiring options.
Yes, the 3MM212RRLBC is designed for outdoor use. It incorporates an outdoor-rated enclosure and UL Listed safety certification, providing weather resistance and reliable operation in exterior spaces. These features help minimize weather-related downtime and support durable, long-term metering deployments in exterior electrical rooms or outdoor cabinets.
Eaton products carry a warranty policy of one year from the date of installation or eighteen months from shipment, whichever occurs first. Comprehensive support includes documentation, access to Eaton specification sheets, and guidance for integrating the 3MM212RRLBC with existing MCB configurations and metering schemes.
Plan for the two-socket, five-jaw configuration and the fifth jaw at 9 o'clock to optimize wiring routes. Verify compatibility with your selected MCBs and feeder protections to match 125A service and 120/208Vac operation. The outdoor, UL Listed design reduces indoor space needs and labor, delivering faster commissioning and a stronger ROI for multi-tenant or retrofit projects.