Eaton 3MM212RC Meter Stack for Residential Power - UL Listed
Part Number: 3MM212RC
Quick Summary
The Eaton 3MM212RC Meter Stack is a compact, multi-metering solution for outdoor residential power distribution. Installers often struggle with space constraints, wiring complexity, and metering accuracy; this stack consolidates meters and connections. UL Listed certification reinforces safety and regulatory compliance in outdoor service installations. The design simplifies field wiring through two sockets and five-jaw connectors, reducing installation time. With three-phase in and single-phase out capability, it supports mixed load profiles common in residential and light commercial sites. Its rugged copper bus, outdoor-rated enclosure, and Eaton warranty translate into tangible business value by reducing downtime and rework. In practice, engineers rely on dependable metering products for accurate energy analytics, faster commissioning, and compliant service installations.
Product Information
Extended Description
3MM212RC Eaton: Eaton 3MM residential meter stack, MM, 125A, Copper, Bus:800A, No bypass, Outdoor, Five-jaw, Sockets:2, Three-phase in, single-phase out, A-B, BR2_, BRH2_, BRHH2_, BRX2, Ring, Socket:125A, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM212RC
UPC
782114990667
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
56 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 - 3MM212RC
Feature: Multiple metering capability allows monitoring of diverse loads within a single enclosure. Business impact: Improves energy visibility and reduces the need for separate meter housings, lowering capital and installation costs. Application: Ideal for outdoor residential service entrances and light commercial sites where precise, consolidated energy data is essential for billing accuracy and energy management. Feature: The 125A main input with an 800A copper bus delivers robust load carrying capability for common residential and light commercial feeders. Business impact: This rating reduces the need for oversized equipment, lowers installation costs per feeder, and improves fault isolation. Application: Suitable for service entrances and distribution panels where precise main and bus ratings support scalable metering. Feature: Outdoor-rated enclosure and rugged copper bus design endure exposure to weather while maintaining electrical integrity. Business impact: Extended service life and lower preventive maintenance costs translate into lower total cost of ownership for utilities and installers. Application: Outdoor meter stacks used in residential subdivisions and light commercial campuses benefit from dependable performance under sun, rain, and temperature swings. Feature: Two sockets with five-jaw connectors support secure, flexible terminations and straightforward field wiring. Business impact: Reduced commissioning time, fewer reworks, and improved connector reliability in diverse conductor configurations. Application: Typical Eaton metering schemes in outdoor installations. Feature: Three-phase in, single-phase out capability combined with 120/208Vac operation. Business impact: Enables mixed-load metering without separate panels, optimizing space and costs. Application: Outdoor service entrances where transitions between circuit types are common.
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FAQs
The 3MM212RC is designed for outdoor residential service entrances and light commercial sites. It supports three-phase in, single-phase out configurations, two sockets, and five-jaw connectors, making it suitable for mixed-load metering. It aligns with common Eaton metering schemes (A-B, BR2_, BRH2_, BRHH2_, BRX2) and ring configurations, simplifying retrofits and upgrades while maintaining a compact footprint.
Key specifications include a 125 A main input, 800 A bus rating, copper bus material, and 120/208 Vac operation. The unit features two sockets with five-jaw connectors, supports three-phase in and single-phase out, and is intended for outdoor installations. The product is UL Listed, providing assurance of safety and regulatory compliance for metering equipment in residential and light commercial applications.
Yes. The meter stack is explicitly designed for outdoor use, featuring an outdoor-rated enclosure and a rugged copper bus to withstand weather exposure. UL Listed certification reinforces safety and compliance for outdoor metering deployments, while the two-socket, five-jaw design supports stable, long-term connections in variable conditions common to exterior service entrances.
Eaton provides a warranty per policy 25-000: one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. Support includes access to Eaton documentation and technical resources, with a focus on reliable field performance, maintenance planning, and minimizing downtime in outdoor metering installations.
The meter stack consolidates metering circuits, reducing hardware footprint and field wiring complexity, which lowers installation time and labor costs. Its rugged, outdoor-rated design reduces maintenance frequency and risk of moisture-related failures. In addition, UL Listed certification helps ensure compliance, lowering regulatory risk and supporting faster commissioning for residential and light commercial projects.