Eaton 3MM220R12RL Residential Meter Stack - UL Listed
Part Number: 3MM220R12RL
Quick Summary
Eaton 3MM220R12RL residential meter stack delivers multi-metering for service entrances in multi-tenant and light commercial buildings. This solution reduces wiring complexity, accelerates commissioning, and minimizes the risk of miswiring at handoff points. UL Listed, TNMP-approved, and outdoor-ready, it provides regulatory confidence and reliable exterior operation. By consolidating metering hardware, it supports accurate energy accounting, faster fault isolation, and simplified maintenance. For buyers, the unit aligns with Eaton power management and distribution strategies, enabling scalable metering across units while remaining compatible with common MCBs and field wiring schemes.
Product Information
Extended Description
3MM220R12RL Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Al, Bus:1200A, No by, Outdoor, Depends on selected MCB, 5-jaw, Sockets:2, 3-ph in, 1-ph out, A-B, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ringless, Socket:200A, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM220R12RL
UPC
782114786260
Product Length/Depth
13.5 in
Product Height
52.35 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
Utility approvals
TX : Texas-New Mexico Power (TNMP) NM : Texas-New Mexico Power (TNMP)
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM220R12RL
Feature → Business Impact → Application: The Eaton 3MM220R12RL enables multiple metering with a 200A per meter capacity and a 1200A bus, reducing panel space and wiring complexity while improving revenue-grade measurement. This translates to faster commissioning and lower field labor costs in multi-tenant residential developments and light commercial projects. Application: Ideal for multi-tenant buildings needing centralized metering with precise energy accounting and simplified service coordination. Feature → Business Impact → Application: Outdoor-rated enclosure and UL Listed certification deliver dependable performance in exterior installations, mitigating weather-related risks and compliance concerns. Application: Suitable for exterior meter installations on campuses, mixed-use properties, and utility-aligned metering strategies. Feature → Business Impact → Application: Utility approvals (TNMP) streamline permitting and interconnection processes, shortening project schedules and reducing regulatory hurdles. Application: Texas-area installations where TNMP participation is required or beneficial. Feature → Business Impact → Application: Sockets and 3-ph in / 1-ph out functionality enable flexible wiring topologies, supporting various MCB configurations and reducing design-change risk. Application: Retrofit or new-build metering where routing and protection coordination are critical. Feature → Business Impact → Application: Heavy-duty 69 lb weight and 52.35 in height emphasize robust build quality and longevity, lowering replacement frequency and field service occurrences. Application: Outdoor, high-use metering points with demanding installation environments. Feature → Business Impact → Application: Warranty coverage (one year from installation or 18 months from shipment) provides a clear, defensible total cost of ownership profile. Application: Procurement planning and budget forecasting for long-life metering infrastructure in property portfolios.
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FAQs
Begin with a site assessment to confirm outdoor-ready mounting. Mount the stack to support a 200A per meter feed and a 1200A bus, then connect the two meters with 3-phase in and 1-phase out wiring per the A-B or CCV2_XMM configurations. Use appropriate MCBs and verify UL Listed installation requirements. Finish with commissioning checks to confirm metering accuracy and safety clearances.
The unit provides multiple metering with two sockets and a 5-jaw enclosure, supporting 200A per meter on a 120/208Vac system and a 1200A bus. It accommodates 3-phase in and 1-phase out configurations and is designed for accurate energy accounting across multiple tenants or loads, reducing billing disputes and improving revenue assurance.
Yes. The meter stack includes TNMP utility approvals, which simplifies permitting and interconnection processes in Texas markets. Its UL Listed certification further reinforces compliance with utility standards, enabling smoother project approvals and reduced regulatory risk for multi-tenant or mixed-use developments.
The 3MM220R12RL is UL Listed, ensuring recognized safety and performance compliance for metering equipment. The UL listing, combined with TNMP approval, supports regulatory acceptance for outdoor, multi-tenant metering installations and validates the unit's suitability for utility-grade deployment.
The unit includes a one-year warranty from installation or eighteen months from shipment, whichever occurs first, helping manage risk and total cost of ownership. Benefits include reduced field wiring complexity, faster commissioning, and lower maintenance costs due to a consolidated, rugged metering stack designed for outdoor use.