Eaton 3MM512R12RLC Residential Meter Stack - UL Listed
Part Number: 3MM512R12RLC
Quick Summary
The Eaton 3MM512R12RLC Residential Meter Stack is a robust multi-meter solution for outdoor residential and light commercial service. Installers often struggle with space, complex wiring, and ensuring code-compliant metering layouts in compact spaces. This unit is UL Listed and outdoor-rated, designed to withstand field conditions while delivering reliable measurement across multiple meters. It supports five-jaw sockets, three-phase in and single-phase out configurations, and a 125A service with a 1200A bus to maximize panel utilization. Depending on the selected MCB, it integrates with Eaton BR-series breakers (BR2, BRH2, BRHH2, BRX2) to tailor protection without compromising space. By streamlining installation and improving fault isolation, this meter stack delivers faster deployments and lower lifecycle costs for utilities and developers.
Product Information
Extended Description
3MM512R12RLC Eaton: Eaton 3MM residential meter stack, Multiple meter, 125A, Cu, Bus:1200A, No bypass, Outdoor, Depends on selected MCB, Five-jaw, Sockets:5, Three-phase in, single-phase out, A-B, BR2_, BRH2_, BRHH2_, BRX2, Ringless, Socket:125A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM512R12RLC
UPC
786685512914
Product Length/Depth
12.26 in
Product Height
57.5 in
Product Width
7.01 in
Product Weight
69 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 - 3MM512R12RLC
Feature → Business Impact → Application: Multi-meter capability enables simultaneous monitoring across separate loads, improving circuit visibility and data accuracy for residential and small commercial developments. This results in quicker commissioning, reduced field rewiring, and better outage diagnosis, supporting outdoor residential metering solutions and large-scale feeder projects. Feature → Business Impact → Application: Five-jaw sockets and 125A service with a 1200A bus maximize space efficiency and electrical capacity within a single cabinet, lowering hardware counts and reducing installation footprint for compact, outdoor metering enclosures. Feature → Business Impact → Application: Three-phase in, single-phase out configuration provides flexible phase distribution for mixed-load environments, enabling safer fault isolation and simpler protection strategies in apartment buildings and mixed-use developments. Feature → Business Impact → Application: Compatibility with BR-series breakers (BR2, BRH2, BRHH2, BRX2) supports easy upgrades and tailored protection schemes without cabinet redesign, aligning with maintenance windows and lifecycle cost goals for utilities and developers. Feature → Business Impact → Application: UL Listed and outdoor-rated construction improve compliance confidence and risk mitigation, accelerating procurement cycles and ensuring adherence to NEC and utility standards for outdoor metering products. Feature → Business Impact → Application: Ringless design and defined socket configuration reduce wiring errors, improve install-time predictability, and support fast deployment in field metering projects for contractors and OEMs.
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FAQs
For outdoor meter stacks, verify outdoor enclosure suitability, ensure a 125A service, and confirm 120/208 VAC operation. Plan for five-jaw sockets and the three-phase in, single-phase out configuration. Check compatibility with BR-series breakers (BR2, BRH2, BRHH2, BRX2) to match protection needs, and follow NEC/UL guidelines to simplify wiring, labeling, and fault isolation during commissioning.
The unit consolidates multiple meters in a single outdoor cabinet, supporting five-jaw sockets, 125A service, and a 1200A bus. Its three-phase in, single-phase out capability matches typical multi-dwelling and light commercial feeders, enabling clear meter separation, streamlined maintenance, and safer load distribution in residential developments.
Yes. The 3MM512R12RLC is UL Listed, offering demonstrated safety compliance for outdoor metering equipment. Installations should adhere to UL/NEC requirements, including proper enclosure installation, conductor sizing, and correct MCB integration to ensure continued compliance and reliability.
Warranty terms are Eaton’s standard policy: one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This warranty covers manufacturing defects and supports proactive maintenance planning for outdoor multi-meter stacks in residential or light commercial settings.
Compatibility depends on the selected MCB; the meter stack is designed to work with BR-series breakers. Verify slot availability and ensure the MCB rating matches the 125A service. The five-jaw sockets and modular design support straightforward upgrades and protection tailoring without cabinet redesigns, aiding maintenance windows and long-term ROI.