Eaton 3MM212R12C Residential Meter Stack - UL Listed
Part Number: 3MM212R12C
Quick Summary
Eaton 3MM212R12C residential meter stack is a multi-metering enclosure for outdoor power distribution in residential and light commercial facilities. Engineers often struggle with space constraints and code-compliance when stacking meters in outdoor enclosures. This unit is UL Listed for safety and reliability and supports flexible metering configurations to meet evolving tenant and utility requirements. The rugged, outdoor-rated design combined with 125A main feeders and 1200A bus rating delivers scalable, compliant power monitoring. By optimizing enclosure footprint and simplifying wiring, it reduces installation time and total cost of ownership while aligning with modern metering practices and maintenance workflows. It supports multiple MCB options and socket configurations, enabling straightforward field upgrades.
Product Information
Extended Description
3MM212R12C Eaton: Eaton 3MM residential meter stack, Multiple metering, 125A, Cu, Bus:1200A, No bypass, Outdoor, Depends on selected MCB, Five-jaw, Sockets:2, Three-phase in, single-phase out, A-B, BR2_, BRH2_, BRHH2_, BRX2, Ring, Socket:125A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM212R12C
UPC
786685512853
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
55 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 - 3MM212R12C
Selling Policy 25-000 - Distribution and Control Products and Services
Multi-metering capability lets you consolidate metering into a single outdoor stack, reducing enclosure footprint and installation complexity. This directly lowers capex and simplifies tenant metering administration in multi-tenant residential and light commercial buildings. 125A main feeders with a 1200A bus rating provide headroom for present and near-term load growth, while keeping labeling and wiring organized. This translates to faster commissioning and scalable service upgrades without swapping enclosures. Outdoor-rated design eliminates the need for indoor space and reduces weather-related concerns. Compatibility with selective MCB configurations enables precise protection per meter and simplifies wiring strategies. Three-phase in and single-phase out metering configuration supports diverse electrical services from small commercial to multi-tenant residences. Two sockets and five-jaw options provide flexible, secure connections while supporting common socket and ring configurations. UL Listed certification underscores safety and compliance for residential metering equipment, helping with procurement and installer confidence. Warranty coverage aligns with industry practice and Eaton policy, protecting project ROI and reducing risk. Industry insight: rugged construction and straightforward wiring align with field crews' workflows, shortening commissioning time and reducing on-site errors.
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FAQs
Begin with the outdoor panel and ensure proper clearance for the meter stack. Mount the enclosure, connect the 125A main feeder, and land conductors in the two metering sockets. Route conductors for three-phase input and single-phase output as required, observing 120/208 VAC ratings and the no bypass configuration. Verify UL Listed labeling and perform a final energization check.
The stack supports multiple metering configurations, including three-phase in and single-phase out, with two sockets and five-jaw connections. This enables simultaneous metering of separate loads or tenants while maintaining a common service. It accommodates field MCB selections (BR, BRH, BRX families) and ring/socket arrangements for future upgrades without changing enclosures.
Yes. Its outdoor design, 125A main with a 1200A bus rating, and multi-metering capability make it ideal for multi-tenant residential and light commercial installations. The compact footprint reduces space needs in exterior walls or utility rooms, while UL Listed safety and flexible wiring options support scalable metering and efficient tenant management.
The product is UL Listed, providing recognized safety and performance certification for residential metering equipment. This simplifies procurement, installation, and regulatory compliance for outdoor metering assemblies used in residential and light commercial applications.
Eaton offers a warranty policy of one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This policy, combined with Eaton’s technical support and documented specifications, helps protect project ROI and support ongoing maintenance and service.