Eaton residential meter stack 1MM412RRLB - UL Listed
Part Number: 1MM412RRLB
Quick Summary
Eaton residential meter stack provides multi-metering for electrical feeders in residential and light commercial installations. This solution streamlines metering layouts, reducing field wiring time and potential errors during installation. UL Listed, housed in a NEMA 3R enclosure, and designed for 120/240 V service with a 200 A rating, it supports reliable outdoor and indoor installation. By enabling precise monitoring across multiple breakers, it delivers energy visibility that informs maintenance planning and utility bill optimization. Practical and scalable, it aligns with modern energy-management goals while supporting contractor efficiency and building-wide power management strategies.
Product Information
Extended Description
1MM412RRLB Eaton: Eaton residential meter stack, Multiple metering, 125A, Al, Bus: 800A, Horn bypass, NEMA 3R, Depends on selected main circuit breaker, Four-jaw, 4, Single-phase in/single-phase out, BR2_, BRH2_, BRHH2_, Ringless, 120/240V
Product Name
Eaton residential meter stack
Catalog Number
1MM412RRLB
UPC
786849052232
Product Length/Depth
12.26 in
Product Height
48.5 in
Product Width
7.01 in
Product Weight
54.7 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
Amperage Rating
200A
Bus material
Aluminum
Bus Rating
800 A
Bypass
Horn
Number of jaws
Four-jaw
Number of sockets
4
Phase
Single-phase in, single-phase out
Security
Ringless
Voltage rating
120/240 V
Utility approvals
IA : Alliant (IP&L and WP&L) WI : Alliant (IP&L and WP&L) NY : Central Hudson Gas & Electric (CHG&E) IL : Commonwealth Edison (ComEd) / CECHA MI : Consumers Energy OH : Dayton Power and Light (DP&L) MD : First Energy (Potomac Edison) VA : First Energy (Potomac Edison) WV : First Energy (Mon Power) NJ : First Energy (Jersey Central Power and Light) OH : First Energy (Ohio Edison, Toledo Edison, The Illuminating Company) PA : First Energy (Allegheny Power, MET ED, Penelec, West Penn Power) NY : Orange & Rockland Utilities PA : PECO Energy WI : WE Energies / Wisconsin Public Service (WPS) PA : Pennsylvania Power & Light (PPL) NY : Rochester Gas & Electric (RG&E) NY : New York State Electric & Gas (NYSEG) KY : Louisville Gas & Electric/Kentucky Utilities
Enclosure
NEMA 3R
Interrupt rating
Depends on selected main circuit breaker
Secondary circuit breaker
BR2_, BRH2_, BRHH2_
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM412RRLB
Feature → Business Impact → Application: Multi-metering capability (Multiple metering) enables centralized energy visibility across tenants or feeders, improving billing accuracy and energy management for property managers and building owners. This translates to tighter cost control and faster fault isolation in mixed-use developments. Application: residential and light commercial metering installations where separate sub-metering is required. Feature → Business Impact → Application: 125A main dependent with 800 A bus (Aluminum) provides scalable protection and a robust main-to-bus relationship, reducing the need for frequent field upgrades as the facility grows. Application: new builds and retrofits needing future-proof feeder capacity. Feature → Business Impact → Application: Four-jaw, ringless 4-socket configuration streamlines wiring, minimizes copper usage, and facilitates quicker service reconnection after main breaker changes. Application: service entrances in multi-tenant properties. Feature → Business Impact → Application: Horn bypass and single-phase in/out design simplify utility interconnection and coordination with utility meters, speeding commissioning. Application: outdoor or outdoor-adjacent installations where quick bypass is beneficial. Feature → Business Impact → Application: NEMA 3R enclosure delivers weather-resistant protection for outdoor installations, reducing enclosure downtime and weather-related interruptions. Application: exterior meter stacks in parking garages, curbside enclosures, and building exteriors. Feature → Business Impact → Application: UL Listed and extensive utility approvals provide compliance assurance, easing utility interconnection and reducing project risk. Application: projects requiring regulatory alignment and utility acceptance. Feature → Business Impact → Application: Comprehensive warranty coverage (one year from installation or 18 months from shipment) lowers lifecycle risk and supports maintenance planning. Application: long-term asset management for building facilities teams.
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FAQs
The 1MM412RRLB is designed for four-jaw, ringless connections with a horn bypass, supporting a 125A main and an 800A aluminum bus. For multi-tenant buildings, install per the included wiring diagrams, ensuring the main breaker matches the 125A setting and the bus rating meets anticipated feeder loads. Verify termination torque and tighten per Eaton guidelines, then perform insulation and continuity tests before energizing.
This unit supports single-phase in and single-phase out metering with four sockets suitable for multi-metering layouts. It accommodates 120/240 V service and is configured for multiple metering in residential or light commercial applications. When planning, confirm utility requirements for downstream metering points and coordinate with the main circuit breaker to ensure compatible protection.
Yes, the 1MM412RRLB is designed for outdoor-ready installations with a NEMA 3R enclosure. This rating provides weather-resistant protection against moisture and outdoor exposure, enabling reliable operation in exterior meter stacks. Ensure proper clearance and mounting orientation per the installation manual to maintain enclosure integrity and accessibility for maintenance.
The meter stack carries UL Listed certification and is aligned with extensive utility approvals across multiple states, which eases utility interconnection and acceptance. These certifications help ensure compliance with code and utility requirements, reducing approval cycles during project execution and providing confidence in long-term performance and safety.
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 provides protection against manufacturing defects and supports retrofit and maintenance planning. For ongoing reliability, follow Eaton’s recommended inspection intervals and component compatibility notes to minimize downtime.