Eaton 3MM220RRL Residential Meter Stack - UL Listed

Part Number: 3MM220RRL
Manufacturer
Eaton
Part number
3MM220RRL

Quick Summary

Eaton residential meter stack 3MM220RRL enables efficient grouped metering for outdoor, multi-tenant electrical systems. This design reduces wiring complexity and simplifies service management while improving safety in shared facilities. UL Listed certification supports safety compliance, and the outdoor enclosure plus aluminum bus construction deliver weather resistance and long-term durability. With a 200A rating and 120/208V capability, it scales to growing energy needs while maintaining a compact footprint. The system supports 3PH in, 1PH out configurations and integrates smoothly with ringless security, meeting common utility and building code requirements for modern multi-tenant environments.

Product Information

Extended Description

3MM220RRL Eaton: Eaton's Three-Phase Residential Meter Stack Module, Group Metering Type, 200A, Aluminum Bus 800 Ampere, No bypass, Outdoor, Five-jaws 2 Sockets, Three-phase in, single-phase out, Ringless Security, 120/208V
Product Name
Eaton residential meter stack
Catalog Number
3MM220RRL
UPC
786849052188
Product Length/Depth
50.5 in
Product Height
8 in
Product Width
16 in
Product Weight
65 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
ME : Central Maine Power NC : Dominion VA : Dominion ME : Emera Maine (Bangor Hydro Electric Co./ Maine Public Service Company) AR : Entergy LA : Entergy MS : Entergy TX : Entergy GA : Georgia Power KS : Kansas City Power and Light (KCPL) / Westar Energy MO : Kansas City Power and Light (KCPL) / Westar Energy TN : Middle Tennessee EMC NM : Public Service Company of New Mexico (PNM) FL : Tallahassee City Electric SC : South Carolina Electric and Gas (SCE&G) IN : Indiana Michigan Power (IMP) (AEP East) MI : Indiana Michigan Power (IMP) (AEP East) OH : AEP Ohio (AEP East) TN : Appalachian Power (AEP East) VA : Appalachian Power (AEP East) WV : Appalachian Power (AEP East) TX : Texas-New Mexico Power (TNMP) NM : Texas-New Mexico Power (TNMP)
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
Aluminum
Bypass
None
Number of jaws
Five-jaw
Number of sockets
2
Phase balance
A-B
Security
Ringless
Feature → Business Impact → Application: Group metering capability enables centralized monitoring and billing across multiple units, reducing manual read errors and saving time for property managers and engineers. Application: multi-tenant housing and commercial campuses benefit from scalable submetering that aligns with utility incentives and energy management objectives. Feature → Business Impact → Application: Outdoor, weather-rated enclosure protects sensitive metering components from rain, dust, and temperature swings, lowering maintenance costs and downtime. Application: exterior meter installations at multi-building sites. Feature → Business Impact → Application: Aluminum bus with an 800 A rating delivers robust electrical pathways while keeping weight and handling practical for field crews. Application: rapid site deployment and safer installation in tight outdoor spaces. Feature → Business Impact → Application: Five-jaw design with two sockets and ringless security simplifies wiring topology and enhances security; reduces commissioning time. Application: group metering in apartment complexes, retail campuses, and mixed-use developments. Feature → Business Impact → Application: UL Listed certification and broad utility approvals minimize project risk and speed utility interconnection. Application: code compliance and utility acceptance for new builds and retrofit projects. Feature → Business Impact → Application: Three-phase in, single-phase out capability supports diverse service configurations with minimal transformer needs. Application: utility-ready metering and building distribution integration.

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FAQs

Interrupt rating is dependent on the selected main circuit breaker. The unit features a 200A amperage rating with an 800A bus rating and five-jaw, two-socket configuration, designed for flexible main breakers while maintaining ringless security and outdoor readiness. Ensure the chosen breaker is rated for the system’s three-phase in, single-phase out setup.
Install in an outdoor, weather-protected location with proper clearance around the five-jaw enclosure. Use the aluminum bus for durable service and ensure vertical/horizontal mounting fits the site layout. The unit’s 50.5 in depth, 16 in width, and 8 in height influence enclosure selection and accessibility for routine maintenance.
Yes. It is a group metering module with three-phase in and single-phase out, rated for 120/208V, and backed by UL Listed certification. The meter stack supports utility approvals across multiple regions, facilitating interconnection for multi-tenant properties while simplifying billing and energy management.
The product carries UL Listed certification for safety compliance. Eaton’s warranty policy 25-000 provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first, offering project protection against manufacturing defects.
Aluminum bus reduces weight while delivering an 800 A bus rating, supporting higher current carrying capacity with easier handling during installation. This improves field efficiency, reduces labor costs, and enhances performance in outdoor environments where aluminum’s conductivity and weight advantages are beneficial.