Eaton 3MM420RRLB Residential Meter Stack - UL Listed
Part Number: 3MM420RRLB
Quick Summary
The Eaton 3MM residential meter stack provides multi-metering for outdoor installations in residential and light commercial settings. This solution addresses space constraints and wiring complexity common in shared service panels by consolidating meters into a single, weather-rated enclosure. UL Listed safety certification ensures code-compliant protection for outdoor use. With a 200A socket and 800A bus, it supports scalable service perimeters while maintaining a compact footprint. The unit accommodates 120/208Vac and aluminum bus construction, helping reduce copper usage and installation costs. By enabling precise energy monitoring across multiple meters, it supports advanced metering strategies and utility-grade reliability. This aligns with metering product families and energy-management initiatives for building owners and contractors.
Product Information
Extended Description
3MM420RRLB Eaton: Eaton 3MM residential meter stack, Multiple meter, 200A, Al, Bus:800A, Horn bypass, Outdoor, Depends on selected MCB, 5-jaw, Sockets:4, 3-ph in, 1-ph out, A-B, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ringless, Socket:200A, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM420RRLB
UPC
786849052362
Product Length/Depth
13.5 in
Product Height
64.5 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
Type
Multiple metering
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM420RRLB
The multi-meter capability of the 3MM420RRLB combined with a 200A socket and an 800A bus delivers centralized metering that reduces field wiring and simplifies panel integration, resulting in faster commissioning and lower labor costs for outdoor metering projects. This translates to improved reliability and compliance in multi-tenant and mixed-use developments, where accurate energy accounting is critical for utility reimbursements and tenant billing. The aluminum construction and outdoor-rated enclosure enhance weather resistance and long-term durability, reducing maintenance cycles and replacement risk in exterior installations. With four sockets and a 3-ph in, 1-ph out configuration, the stack supports diverse feeder arrangements and scalable metering for evolving load profiles, improving energy visibility and fault isolation. Ringless socket design enables easier access and safer servicing during routine inspections, minimizing downtime and service calls. The 64.5 inch height and compact footprint optimize meter-room layouts, while the 98 lb weight offers robust handling during installation without excessive crane or lifting requirements. A one-year warranty (or 18 months from shipment) provides procurement assurance for project timelines and ROI expectations, alongside UL Listed safety compliance that aligns with utility and contractor standards.
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FAQs
For outdoor installations, plan a weather-rated enclosure with access for four sockets, 3-phase in and 1-phase out wiring, and a mount that accommodates the 64.5 in height. Ensure 120/208Vac compatibility, aluminum bus, and the 200A service with an 800A bus rating. Use proper conduit entries and secure mounting to support outdoor exposure and maintenance access.
The unit is designed for multiple metering with four sockets and a 3-phase in, 1-phase out configuration. This enables monitoring of several service feeders or tenants within a single outdoor stack. Plan for an 800A bus to support concurrent loads, and route feeders to appropriate meters, while maintaining balanced phase loading for accuracy and reliability.
Yes, the 3MM420RRLB is UL Listed, confirming compliance with safety standards for electrical equipment. This certification supports code compliance in many jurisdictions, helps with inspections, and reduces procurement risk when bidding on outdoor metering projects that require recognized safety labeling.
Yes, the design includes ringless sockets, which simplifies wiring access and reduces the risk of contact corrosion and wear during maintenance. Ringless configurations facilitate quicker inspections, safer disconnections, and easier future upgrades, contributing to lower maintenance downtime and improved service reliability.
The product carries Eaton’s warranty policy 25-000: one year from the date of installation or eighteen months from shipment, whichever occurs first. This provides project planners with strong post-purchase protection, helps manage maintenance budgets, and supports ROI through predictable coverage for fielded equipment.