Eaton 3MM residential meter stack - 3MM420R12RLBC - UL Listed
Part Number: 3MM420R12RLBC
Quick Summary
Eaton 3MM residential meter stack enables multi-meter distribution for residential and light commercial installations. For utilities and contractors, coordinating several meters in a single outdoor enclosure can complicate wiring, extend install times, and hinder future metering upgrades. This unit is UL Listed and designed for outdoor use, with a 200A service rating, 120/208V operation, and a 1200A bus, delivering reliable safety and scalability for demanding projects. The rugged enclosure, combined with Eaton’s warranty, minimizes downtime and procurement risk while simplifying field service. For project teams, this solution pairs well with metering products and outdoor electrical enclosures, offering predictable performance, reduced space, and easier maintenance.
Product Information
Extended Description
3MM420R12RLBC Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Cu, Bus:1200A, 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, 120/208Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM420R12RLBC
UPC
786685513270
Product Length/Depth
13.5 in
Product Height
64.5 in
Product Width
7.01 in
Product Weight
77 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
Fifth jaw included at 9oclock position
Type
Multiple metering
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM420R12RLBC
Feature → Multi-meter capacity in a single outdoor stack → Business Impact → Simplifies meter endpoint management, reduces cabinet count, and streamlines procurement → Application → Ideal for multi-dwelling, campus, and outdoor feeder projects. Feature → Outdoor-rated enclosure supporting 120/208V, 200A service → Business Impact → Enhances safety and reliability in exterior environments, enabling faster commissioning → Application → Outdoor metering enclosures for residential and light commercial installations. Feature → 5-jaw with fifth jaw included at 9 o'clock position and 4 sockets → Business Impact → Expands metering configurations while minimizing wiring errors → Application → Custom socket arrangements for flexible metering layouts. Feature → High bus rating of 1200A and modular socket configuration → Business Impact → Supports load growth and centralized metering for larger properties → Application → Feeder coordination in larger residential or small commercial deployments. Feature → UL Listed with Eaton warranty → Business Impact → Compliance assurance and long-term support reduce risk and maintenance costs → Application → Procurement and lifecycle planning for spec-compliant projects.
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FAQs
The Eaton 3MM420R12RLBC is designed for outdoor metering with 120/208V service and up to 200A per meter stack. It supports multi-meter configurations in a single enclosure, simplifying installation in outdoor electrical rooms and on building exteriors. When planning, verify clearances, weatherproof mounting, and compatibility with local metering standards to ensure a compliant, efficient setup.
Key specs include a 200A service rating, 120/208Vac operation, a 1200A bus rating, 5-jaw configuration with a fifth jaw at 9 o'clock, and four sockets for multi-meter arrangements. The unit is intended for outdoor use and provides three-phase in and single-phase out metering paths, aligning with common residential and light commercial metering schemes.
Yes. Designed for outdoor deployment, this meter stack consolidates multiple meters in a single enclosure, supporting multi-dwelling and campus-style metering needs. Its 200A service and modular socket layout enable scalable configurations, while UL Listing ensures safety compliance. Consider project-specific cabinet dimensions and installation clearances to maximize space efficiency and ease of service.
The product is UL Listed, confirming conformance with recognized safety standards for electrical equipment. This certification supports code compliance for outdoor metering installations and simplifies procurement for projects requiring vetted safety listings. Always cross-reference with local electrical codes and utility requirements to ensure full regulatory alignment.
Maintenance benefits include reduced field labor due to a centralized multi-meter enclosure, built-in fifth jaw for configuration flexibility, and a robust outdoor-rated design. The warranty (one year from installation or 18 months from shipment) provides protection against early failures, while the 1200A bus and 200A service support scalable metering, potentially lowering future retrofit costs and improving overall lifecycle ROI.