Eaton 3MM412R12RLBC meter stack - UL Listed
Part Number: 3MM412R12RLBC
Quick Summary
The Eaton 3MM412R12RLBC meter stack is a compact, multi-metering solution for outdoor residential and light-commercial power distribution. It simplifies integration by consolidating metering in a single enclosure, helping you reduce wiring complexity and field labor. The design emphasizes safety and reliability in harsh environments while supporting 120/208 VAC and a 125A service, with a 1200A bus. UL Listed certification reinforces safety compliance, and Eaton’s warranty backing provides additional peace of mind. By leveraging this stack, utilities and installers can streamline metering, improve accuracy, and lower lifecycle costs through fewer parts and faster commissioning. Secondary benefits include improved load visibility and scalable metering for evolving energy programs.
Product Information
Extended Description
3MM412R12RLBC Eaton: Eaton 3MM residential meter stack, Multiple metering, 125A, Cu, Bus:1200A, Horn bypass, Outdoor, Depends on selected MCB, 5-jaw, Sockets:4, Three-phase in, single-phase out, B-C, BR2_, BRH2_, BRHH2_, BRX2, Ringless, Socket:125A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM412R12RLBC
UPC
786685512921
Product Length/Depth
12.26 in
Product Height
48.5 in
Product Width
7.01 in
Product Weight
64 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 - 3MM412R12RLBC
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Multiple metering capability enables concurrent monitoring across circuits, reducing the need for separate meters and enabling centralized energy management. This translates to improved billing accuracy and faster fault isolation in mixed-residential and small commercial developments. Application: outdoor meter stacks in multifamily dwellings or retail buildings where space is constrained.Feature → Bus topology supports a 1200A main bus and 125A sockets, enabling robust handling of higher-rated feeders with reduced voltage drop. Business impact: enhanced reliability and reduced rework from undersized bus components. Application: outdoor enclosures serving multiple tenants or zones, where consistent performance is critical.Feature → Five-jaw design and fifth jaw included at 9 o’clock position improves fault-tinding and service isolation, lowering commissioning time. Business impact: faster installation, lower labor costs, and safer maintenance access. Application: new-build or retrofit projects requiring rapid metering setup with minimal field modification.Feature → Three-phase in, single-phase out capability supports common utility configurations, improving installation flexibility and compatibility with varied panel boards. Business impact: simplifies system design and procurement, reducing stock variety. Application: mixed-phase commercial metering in multifamily or light-industrial facilities.Feature → Outdoor-rated enclosure with ringless socket design and horn bypass capability enhances weather resistance and utility-grade reliability. Business impact: minimizes weather-related outages and service calls, extending asset life. Application: exterior meter stacks in harsh environments or where vandal resistance and weatherproofing are essential.Feature → UL Listed certification provides safety compliance and quality assurance, while warranty terms offer ongoing risk protection. Business impact: assured performance and predictable maintenance budgeting. Application: regulated electrical installations requiring documented safety certifications and proven vendor support.
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FAQs
Plan for an outdoor enclosure capable of housing a 125A service with a 1200A bus and four sockets. Ensure space for the fifth jaw at the 9 o’clock position and verify compatibility with the intended MCBs. The unit supports three-phase in, single-phase out and uses a 120/208 VAC configuration, aiding straightforward wiring and commissioning.
The multiple metering feature consolidates measurements within one stack, reducing the need for separate meters and minimizing point-of-use wiring errors. This improves billing accuracy, simplifies data aggregation for utility reporting, and enhances load visibility across tenants or zones, enabling more precise demand management.
Compatibility depends on the selected MCBs in the downstream panel and the 125A service arrangement. The design supports various configurations, including four sockets and a fifth jaw, but verify the MCB types, bus connections, and enclosure dimensions during procurement to avoid field rework.
The unit is UL Listed, confirming compliance with recognized safety standards for electrical equipment. This certification supports regulatory acceptance in many markets and provides a clear safety benchmark for installers and inspectors, reducing risk during inspection and commissioning.
Expected ROI comes from reduced field labor due to simplified installation, fewer individual meters, and improved energy data accuracy. The outdoor-rated design lowers maintenance calls related to weather exposure, and Eaton’s warranty adds long-term risk protection, contributing to lower lifecycle costs and more predictable budgeting.