Eaton 3MM420RRLBC Residential Meter Stack - UL Listed
Part Number: 3MM420RRLBC
Quick Summary
Eaton 3MM420RRLBC residential meter stack provides multiple metering for residential and light commercial installations. In many projects, space constraints and wiring complexity make accurate metering, verification, and future expansion challenging. It’s UL Listed for electrical safety and outdoor readiness, featuring a 200A service rating, an 800A bus, and a 120/208 VAC supply. The unit supports 3-phase in and 1-phase out with 4 sockets and configurable MCB options, enabling flexible metering layouts without compromising enclosure footprint. For engineers and procurement teams, this translates to faster installations, easier code compliance, and scalable energy management capabilities that support growing demand in today’s buildings.
Product Information
Extended Description
3MM420RRLBC Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Cu, Bus:800A, Horn by, Outdoor, Depends on selected MCB, 5-jaw, Sockets:4, 3-ph in, 1-ph out, B-C, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ringless, Socket:200A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM420RRLBC
UPC
782114990827
Product Length/Depth
13.5 in
Product Height
64.5 in
Product Width
7.01 in
Product Weight
102 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 - 3MM420RRLBC
Feature: 200A service with an 800A bus bar. Business Impact: Enables scalable, multi-tenant or future-proofed metering without upgrading equipment soon. Application: residential and light commercial projects requiring reliable, expandable power distribution. Feature: Outdoor-rated enclosure and rugged construction. Business Impact: reduces enclosure footprint and protects metering components in harsh environments, lowering maintenance costs. Application: outdoor meter stacks for streetside or building perimeters. Feature: Sockets: four, with 5-jaw design and 3-phase in/1-phase out configuration. Business Impact: provides flexible metering topology, speeding up installation and reducing field rewiring. Application: complex load profiles in multi-unit dwellings or mixed-use facilities. Feature: Compatibility dependent on selected MCB. Business Impact: simplifies integration with existing circuit breakers, lowering total install time and disruption. Application: retrofit projects and new builds alike. Feature: UL Listed certification and one-year warranty policy. Business Impact: strengthens compliance posture and provides peace of mind for procurement and facilities teams. Application: regulated environments where electrical safety certification is mandatory and post-sale support matters.
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FAQs
The 3MM420RRLBC is a residential meter stack designed for multiple metering needs in homes and light commercial buildings. It supports up to 200A service with an 800A bus, enabling separate feeds for different tenants or circuits. It accommodates 3P in and 1P out configurations and is built for outdoor installations, helping installers achieve accurate, code-compliant metering layouts with reduced wiring complexity.
Yes, the 3MM420RRLBC is UL Listed. This certification indicates the product meets recognized safety standards for electrical equipment, enhancing compliance with national electrical codes and reducing installation risk. For projects in regulated environments, UL Listed metering stacks simplify procurement, inspector acceptance, and long-term traceability of safety compliance.
Yes, the Eaton 3MM420RRLBC is designed for outdoor mounting. Its enclosure and components are specified to withstand external conditions, enabling installation on building exteriors or exterior meter pedestals. When planning installation, ensure proper enclosure clearance, weatherproof connections, and alignment with the 120/208 VAC supply and outdoor-rated accessories for optimal performance.
The 3MM420RRLBC supports four sockets and a 5-jaw configuration with 3-phase in and 1-phase out, offering flexible metering layouts. Compatibility depends on the selected MCBs, so verify frame size and trip characteristics during panel reconfiguration or retrofit. This flexibility helps reduce wiring changes and enables smoother integration into existing switchgear or new installations.
Practically, the 3MM420RRLBC reduces installation time through straightforward metering configurations, minimizes wiring errors, and supports scalable metering for future growth. The UL Listing and robust outdoor design lower long-term maintenance costs, while accurate multi-metering improves energy management insight for tracking usage, reducing utility charges, and supporting regulatory reporting.