Eaton 1MM512RRLB Meter Stack - UL Listed
Part Number: 1MM512RRLB
Quick Summary
Eaton residential meter stack is used to organize and protect multiple service entrances in outdoor residential systems. Installers often struggle with weather exposure, space constraints, and coordinating metering hardware across single-phase feeds. UL Listed certification confirms safety compliance for outdoor use, while the outdoor enclosure design shields components and supports reliable operation in harsh environments; the product also aligns with broad utility approvals. Designed for reliable, scalable metering in residential and light commercial projects, it pairs with standard main breakers and metering products to simplify procurement and installation, delivering consistent performance across a range of meter configurations and utility requirements.
Product Information
Extended Description
1MM512RRLB Eaton: Eaton residential meter stack, Amperage rating: 125A, Bus rating: 800A, Outdoor, Interrupt rating depends on selected main circuit breaker, Single-phase in/single-phase out, Aluminum, 5 Sockets, Ringless with horn bypass, 120/240 Vac
Product Name
Eaton residential meter stack
Catalog Number
1MM512RRLB
UPC
786849052249
Product Length/Depth
7.01 in
Product Height
57.5 in
Product Width
12.26 in
Product Weight
67.8 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
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
Interrupt rating
Depends on selected main circuit breaker
Enclosure
Outdoor
Bus Rating
800 A
Phase
Single-phase in, single-phase out
Voltage rating
120/240 V
Amperage Rating
125A
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM512RRLB
Feature: Amperage rating of 125A with a 800A bus rating → Business Impact: Supports common residential service needs while providing headroom for future upgrades → Application: Ideal for 125A utility feeds on outdoor, single-phase 120/240V installations. Feature: Outdoor aluminum enclosure and weather-resistant construction → Business Impact: Reduces downtime and maintenance in exposed locations → Application: Suitable for exterior meter stacks in garages, carports, and external walls. Feature: Type is multiple metering with 5 sockets and ringless horn bypass → Business Impact: Enables clean, multi-point metering without looping rings or horn bypass complexity → Application: Efficient for multi-tenant or multi-service residential setups. Feature: Compliance and data integrity through UL Listed status and utility approvals → Business Impact: Eases code compliance and utility interconnection processes → Application: Streamlined procurement for projects requiring verified safety and utility acceptance. Feature: Product specifications including Catalog Number 1MM512RRLB, UPC 786849052249, and 120/240V operation → Business Impact: Improves traceability and installation planning → Application: Quick reference for ordering, stocking, and field wiring tasks.
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FAQs
Begin with a secure outdoor-rated mounting location, verify the 120/240V single-phase supply, and connect the 5 sockets per the included wiring diagram. The ringless design with horn bypass simplifies field wiring, while the aluminum enclosure provides weather resistance. Always follow NEC and local utility interconnect requirements and ensure UL Listed components are used end-to-end.
Key specs include a 125A amperage rating, 800A bus rating, single-phase in/out configuration, 120/240V voltage rating, aluminum enclosure, outdoor IP considerations, and five sockets. The catalog number is 1MM512RRLB and the product is UL Listed, with compatibility for various utility approvals.
Yes. With a single-phase in/out design, outdoor-rated enclosure, and multiple metering capability, it supports residential and light commercial metering needs. Its 125A service with an 800A bus rating provides flexibility for future main breaker options while maintaining safe, code-compliant outdoor installation.
The product is designed to align with a broad set of utility approvals listed in the documentation, enabling smoother interconnection with multiple electric utilities. Always verify specific utility requirements for your project—the listed approvals help streamline procurement and site acceptance.
Maintenance is typically limited to periodic visual inspections and ensuring weather seals and enclosure integrity remain intact. The robust outdoor design and UL Listed certification contribute to reduced downtime and fewer field repairs, delivering value through longer service life, safer outdoor metering, and faster installation for project ROI.