Eaton 3MM312R12RLBCPS Residential Meter Stack - UL Listed
Part Number: 3MM312R12RLBCPS
Quick Summary
Eaton 3MM312R12RLBCPS residential meter stack is designed to streamline outdoor metering for multi‑unit service entrances. Engineers often struggle with space constraints, wiring complexity, and bypass options that complicate installations in harsh outdoor environments. This design is UL Listed and CPS approved, providing documented safety and compatibility for building codes while supporting long service life. The unit supports three‑phase in, single‑phase out, and a 120/208 Vac supply, with a 125 A main and a 1200 A bus to accommodate growing load demands. Used in residential metering and outdoor power distribution, it delivers reliable, scalable performance for utilities, contractors, and facility managers.
Product Information
Extended Description
3MM312R12RLBCPS Eaton: Eaton 3MM residential meter stack, MM, 125A, Al, Bus:1200A, Horn bypass, Outdoor, Depends on selected MCB, 5-jaw,Sockets:3, Three-phase in, single-phase out, A-B, BR2_, BRH2_, BRHH2_, BRX2, Ringless, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM312R12RLBCPS
UPC
786685494661
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
98 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, CPS approved
Type
Multiple metering
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM312R12RLBCPS
Outdoor readiness and durable enclosure design reduce field maintenance and corrosion risk, translating to lower lifecycle costs and higher uptime for outdoor metering installations. This feature supports faster installation timelines and fewer site visits, a critical benefit for multi‑tenant properties and utilities overseeing distributed service entrances. The 125 A main with a 1200 A bus delivers scalable capacity, enabling load growth without reconfiguration, which lowers total cost of ownership and minimizes service interruptions during peak demand periods. The meter stack supports three‑phase in and single‑phase out, enabling versatile metering configurations for mixed residential and commercial loads, improving regulatory compliance and simplifying project scope for electrical contractors. Compatibility with 120/208 Vac systems and outdoor environments reduces the need for adapters or retrofits, streamlining procurement and installation. Ringless design with five‑jaw sockets and horn bypass provides flexible wiring options that accommodate diverse field scenarios, improving installation efficiency and reducing labor time. UL Listed and CPS approved protections give confidence to facilities managers and inspectors, while the one‑year warranty offers risk mitigation during initial deployment and startup.
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FAQs
The meter stack is designed for outdoor service entrances with a 125 A main and 1200 A bus, supporting three‑phase in and single‑phase out. Installers should mount the unit on a compatible outdoor enclosure, connect the 120/208 Vac supply, and utilize the 5‑jaw sockets with a 9 o'clock fifth jaw position as noted in the catalog. The horn bypass and ringless design simplify wiring and maintenance, while the CPS‑approved status helps meet utility and code requirements during inspection.
Key specs include a 125 A main with a 1200 A bus, 120/208 Vac operating voltage, and a configuration of three‑phase in, single‑phase out. The unit uses 5‑jaw sockets and offers a horn bypass for serviceability. Its dimensions are 12.26 in depth, 41.8 in height, and 7.01 in width, with an approximate weight of 98 lb, making it suitable for outdoor meter banks and compact service rooms.
Yes. The Eaton 3MM312R12RLBCPS is UL Listed and CPS approved, providing verified compliance with safety standards and compatibility requirements for residential outdoor metering. These certifications support code adherence in many jurisdictions and help streamline utility approvals and inspections for multi‑tenant or new construction projects.
This meter stack is ideal for outdoor residential metering and power distribution in multi‑unit buildings, apartment complexes, and mixed residential/commercial facilities. Its outdoor‑ready design, three‑phase in/single‑phase out capability, and CPS approval make it suitable for service entrances, meter banks, and utility‑backed deployments where reliable outdoor metering is required.
Eaton provides a one‑year warranty from installation or eighteen months from shipment, whichever occurs first. Support includes documentation from the UL Listed and CPS approved certifications, available installation notes, and access to Eaton specification sheets and catalogs for reference during procurement, installation, and ongoing maintenance.