Eaton residential meter stack 3MM420RRLC UL Listed
Part Number: 3MM420RRLC
Quick Summary
Eaton residential meter stack is a three-phase metering module for group metering in multifamily and commercial buildings. Facility managers struggle with space, wiring complexity, and evolving codes when expanding meter capacity. UL Listed safety certification is standard, and the design supports outdoor-rated installations with utility approvals in Florida, North Carolina, and Virginia. This solution helps operators reduce installation time and labor costs while ensuring reliability; its group metering capability aligns with modern energy-management strategies.
Product Information
Extended Description
3MM420RRLC Eaton: Eaton's Three-Phase Residential Meter Stack Module, Group Metering Type, 200A, Copper Bus 800 Ampere, No bypass, Outdoor, Five-jaws, 4 Sockets, Three-phase in, single-phase out Ringless Security 120/208V
Product Name
Eaton residential meter stack
Catalog Number
3MM420RRLC
UPC
782114990834
Product Length/Depth
62.5 in
Product Height
8 in
Product Width
16 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
Group Metering
Utility approvals
FL : Tallahassee City Electric NC : Dominion VA : Dominion
Interrupt rating
Depends on selected main circuit breaker
Enclosure
Outdoor
Secondary circuit breaker
CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM
Bus Rating
800 A
Phase
Three-phase in, single-phase out
Voltage rating
120/208V
Amperage Rating
200A
Bus material
Copper
Bypass
None
Number of jaws
Five-jaw
Number of sockets
4
Phase balance
A-B
Security
Ringless
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM420RRLC
Three-phase group metering design streamlines multi-tenant energy measurement, reducing cabinet footprint and wiring complexity while improving accuracy across feeds. This tangible business impact translates to faster commissioning, lower labor costs, and easier scalability for growing property portfolios. The copper bus and 800 A bus rating support robust current capacity, enabling flexible main-to-subfeed configurations in both new builds and retrofit projects. The five-jaw, four-socket arrangement accommodates diverse feeder layouts and simplifies breaker coordination, improving protection coordination and fault isolation. An outdoor-rated enclosure with ringless security reduces tampering risk and minimizes enclosure maintenance in exterior installations. No bypass design simplifies protection schemes and aligns with utility requirements, while compatibility with CCV2_X family breakers enhances retrofit viability and ongoing support from Eaton’s metering ecosystem. These features collectively deliver reliable, code-compliant metering with reduced risk and faster time-to-value for energy-management programs.
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FAQs
The 3MM420RRLC is designed for outdoor group metering with a five-jaw, four-socket configuration and three-phase in, single-phase out. It integrates with standard Eaton secondary breaker options (CCV2_X family) and supports outdoor enclosures. Before install, verify utility approvals and ensure adequate clearance for the 62.5 in depth and 16 in width cabinet to maintain accessibility and fault-clearing paths.
Key specs include a 200 A amperage rating and an 800 A bus rating with copper bus material. It operates at 120/208 V, accommodates three-phase in and single-phase out, and uses five jaws with four sockets. The interruption rating is determined by the selected main circuit breaker, making proper breaker coordination essential for safe operation.
Yes. The product is a Group Metering type module designed for outdoor use, ideal for multifamily dwellings and light commercial properties requiring scalable, centralized metering. Its outdoor enclosure, ringless security, and 120/208 V capability support efficient, compliant metering across multiple tenants or service points without compromising space or accessibility.
The unit is UL Listed, providing recognized safety certification for electrical equipment. It supports outdoor installation and aligns with utility approvals where applicable, such as Florida Tallahassee and Dominion network regions in North Carolina and Virginia, helping streamline field acceptance and code compliance for exterior metering installations.
Warranty follows Eaton policy 25-000, offering one year from date of installation or eighteen months from shipment, whichever occurs first. Support includes standard product documentation, access to Eaton’s metering ecosystem, and authorized distributor assistance for parts, installation guidance, and service planning to optimize ROI and uptime.