Eaton 1MM512RRLBC Residential Meter Stack - NEMA 3R, UL Listed
Part Number: 1MM512RRLBC
Quick Summary
Eaton residential meter stack enables multi-metering for compact electrical distribution systems. Engineers often struggle with space constraints, wiring clutter, and inspection delays when adding metering or subfeed options. This unit is UL Listed and housed in a durable NEMA 3R enclosure, designed for indoor and outdoor use, with a secure ringless design. By standardizing on a single meter rack, utilities and contractors can streamline procurement and installation, while supporting scalable metering with a 125A service and an 800A bus for reliability and growth.
Product Information
Extended Description
1MM512RRLBC Eaton: Eaton residential meter stack, Multiple metering, 125A, Copper, Bus: 800A, Horn bypass, NEMA 3R, Depends on selected main circuit breaker, Four-jaw, 5, Single-phase in/single-phase out, BR2_, BRH2_, BRHH2_, Ringless, 120/240V
Product Name
Eaton residential meter stack
Catalog Number
1MM512RRLBC
UPC
782114990001
Product Length/Depth
12.26 in
Product Height
57.5 in
Product Width
7.01 in
Product Weight
72 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
For indoor applications where a top endwall with knockouts is needed, order (1) of MM12N1WLK. 1MM units do not come with 5th jaw.
Type
Multiple metering
Amperage Rating
125A
Bus material
Copper
Bus Rating
800 A
Bypass
Horn
Number of jaws
Four-jaw
Number of sockets
5
Phase
Single-phase in, single-phase out
Security
Ringless
Voltage rating
120/240 V
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 - 1MM512RRLBC
Feature: Multiple metering with 125A main, 800A bus, four-jaw design, five sockets, horn bypass, 120/240V, ringless construction. Business Impact: Enables true multi-tenant or multi-load monitoring in a compact footprint, reducing panel space and installation time while improving bill accuracy. Application: Suitable for residential and light commercial metering setups seeking scalable monitoring. Feature: Copper bus material and four-jaw configuration with an 800A bus rating. Business Impact: Improves current carrying capacity and reduces heat loss, enhancing efficiency and service reliability. Application: New builds and retrofit projects where durable conductors and robust junctions matter. Feature: NEMA 3R enclosure with indoor/outdoor suitability. Business Impact: Weather resistance and code-compliant mounting simplify site planning and reduce enclosure-related maintenance costs. Application: Exposed or semi-exposed locations requiring reliable performance. Feature: Ringless security design and horn bypass option. Business Impact: Enhances safety during metering and provides flexible bypass paths for service continuity. Application: Utility-grade installations with service reliability requirements. Feature: Compatibility with BR2_, BRH2_, BRHH2_ secondary breakers; installation depends on chosen main breaker. Business Impact: Customizable protection schemes and compliance with governing standards. Application: Modular service configurations for diverse electrical installations. Feature: Eaton warranty and UL Listed certification. Business Impact: Reduces lifecycle risk and supports procurement with confidence. Application: Widely adopted in commercial and residential electrical distribution projects.
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FAQs
Yes. The 1MM512RRLBC supports a range of secondary breakers BR2_, BRH2_, and BRHH2_. Compatibility with a specific main breaker depends on the chosen main circuit breaker, so confirm the service design and interrupt rating to ensure compliant protection and uninterrupted service.
The unit is rated for 125A with an 800A bus rating, copper bus material, four-jaw design, five sockets, and 120/240V single-phase in and out. It features horn bypass, a ringless design, and a NEMA 3R enclosure suitable for indoor and outdoor installations.
It is ideal for multi-metering in residential and light commercial environments, such as multi-tenant buildings. For top-endwall installations, pair with MM12N1WLK. The unit’s NEMA 3R enclosure and UL listing support both interior and exterior configurations while meeting code requirements.
The meter stack is UL Listed and built in a NEMA 3R enclosure, delivering reliable protection for varied environments. These certifications support compliance with safety standards and assist in regulatory approvals during procurement and installation.
The unit’s robust copper bus and ringless design improve reliability and reduce maintenance intervals. The UL Listed certification and standard warranty help minimize risk and Total Cost of Ownership, while scalable metering supports accurate energy management and faster project completion, delivering tangible uptime and energy reporting benefits.