Eaton 3MM220R12 Residential Meter Stack - UL Listed
Part Number: 3MM220R12
Quick Summary
The Eaton 3MM220R12 residential meter stack provides multiple metering for outdoor service entrances. For property owners and electrical contractors, accurate billing and compact, secure installations are essential, and this unit addresses both by consolidating meters in a single outdoor enclosure. Key certifications include UL Listed status and CenterPoint Energy utility approvals, reinforcing safety, reliability, and utility compatibility. Its 200A rating paired with a five-jaw design supports flexible protection schemes, while outdoor readiness minimizes weather-related service interruptions. This solution delivers measurable business value by simplifying installation, reducing wiring errors, and enabling scalable metering across residential and light commercial projects.
Product Information
Extended Description
3MM220R12 Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Al, Bus:1200A, No by, Outdoor, Depends on selected MCB, 5-jaw, Sockets:2, 3-phase in, 1-phase out, A-B, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ring, Socket:200A, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM220R12
UPC
782114733769
Product Length/Depth
13.5 in
Product Height
52.35 in
Product Width
7.01 in
Product Weight
68 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 : CenterPoint Energy (HL&P/Reliant)
Number of jaws
Five-jaw
Amperage Rating
200A
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM220R12
Selling Policy 25-000 - Distribution and Control Products and Services
Multiple metering capabilities enable simultaneous measurement for several circuits without adding separate panels. This reduces space requirements, shortens installation time, and minimizes wiring complexity, directly lowering project labor costs. It is well-suited for multi-tenant dwellings and light commercial buildings where accurate, tenant-specific energy accounting is required. Five-jaw sockets provide secure, low-resistance terminations and robust bus connections. The resulting lower fault rates speed up commissioning and reduce service calls after installation. This configuration is particularly beneficial for outdoor installations where accessible field wiring must be reliable and easy to verify. Outdoor-rated enclosure and weather exposure resilience enhance reliability and reduce maintenance intervals. Installation advantages include straightforward mounting and alignment with standard service entrances, while the 13.5 inch depth and sizable height help accommodate protective covers and labeling. UL Listed certification and CenterPoint Energy utility approvals support code compliance and utility interconnections. This reduces procurement friction, improves acceptance by local utilities, and minimizes rework during commissioning. Flexible MCB compatibility and the ability to tailor protection to specific feeder loads by selecting appropriate protection devices. The warranty terms—one year from installation or 18 months from shipment—provide peace of mind and support ongoing operations. Dimensions and weight translate to sturdy, enduring performance in outdoor environments. With 13.5 in length, 52.35 in height, 7.01 in width, and 68 lb, it demands proper space planning but yields durable metering infrastructure that reduces future maintenance costs.
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FAQs
Plan for outdoor mounting space and clearance, as the unit measures 13.5 in (L) by 7.01 in (W) by 52.35 in (H) and weighs 68 lb. Ensure a secure mounting surface, proper weatherproof enclosure, and accessible wiring routes for the five-jaw sockets. Verify utility approvals and select appropriate MCB protection to match feeder loads.
A 200A rating supports medium- to larger-load feeders and multi-meter configurations. The 120/208Vac capability accommodates common distribution schemes in residential and light commercial settings. When sizing, match feeder conductors and protection devices to the expected load, and align MCB choices to maintain protection coordination and minimize voltage drop.
Yes. The 3MM220R12 is purpose-built for multiple metering in outdoor installations, enabling tenant-specific energy measurement while complying with utility requirements. CenterPoint Energy approvals further ease utility interconnection, and UL Listed certification supports code compliance across mixed-use developments.
The unit is UL Listed, providing recognized safety compliance for electrical equipment. It also carries CenterPoint Energy utility approvals for TX and similar markets, smoothing utility interconnections and acceptance during installation. These certifications help reduce commissioning risk and avoid rework in the field.
The product carries Eaton’s warranty of one year from installation or 18 months from shipment, whichever occurs first. This reduces ownership risk and maintenance costs. Reliable metering minimizes outage-related downtime, lowers service calls, and supports faster project amortization in multi-tenant or mixed-use properties.