Eaton 3MM320RRL Residential Meter Stack - UL Listed
Part Number: 3MM320RRL
Quick Summary
Eaton residential meter stack enables grouped metering for multi-tenant and commercial load centers. This outdoor, group metering module simplifies deploying multiple tariffs while maintaining secure, ringless access. It is UL Listed and supported by widespread utility approvals, including ME and Emera Maine, ensuring field acceptance. For engineers and procurement teams, the 3MM320RRL offers a clear rating path with 200 A main, 800 A bus, and an outdoor-rated enclosure. Standardizing on this Eaton stack reduces wiring complexity, accelerates installation, and improves metering accuracy and serviceability across projects.
Product Information
Extended Description
3MM320RRL Eaton: Eaton's Three-Phase Residential Meter Stack Module, Group Metering Type, 200A, Aluminum Bus 800 Ampere, No bypass, Outdoor, Five-jaws, 3 Sockets, Three-phase in, single-phase out Ringless Security, 120/208V
Product Name
Eaton residential meter stack
Catalog Number
3MM320RRL
UPC
786849052195
Product Length/Depth
13.5 in
Product Height
52.4 in
Product Width
7 in
Product Weight
67 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
3
Phase balance
A-B
Security
Ringless
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM320RRL
Selling Policy 25-000 - Distribution and Control Products and Services
Three-phase in, single-phase out configuration combined with a 200 A amperage rating and an 800 A bus rating directly translates to simplified, scalable metering for multi-tenant buildings and light commercial applications. This feature set reduces wiring runs, minimizes panel clutter, and delivers measurable efficiency gains during commissioning and future expansions. The aluminum bus construction supports durable, long-term service in outdoor environments, while five-jaw and three sockets enable straightforward, secure connections and future retrofit flexibility. Ringless security and no bypass design improve safety and tamper resistance, lowering risk and insurance costs for building owners and managers. The enclosure is outdoor-rated, supporting installations in exposed locations and meeting common utility acceptance criteria, with compatible secondary breakers (CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM) for streamlined system integration. Utility approvals listed in the datasheet, along with UL Listed certification, reinforce compliance and project readiness, reducing approval cycles. Installation efficiency is bolstered by standardized dimensions (13.5 in depth, 52.4 in height, 7 in width) and a 67 lb weight, aiding transport and mounting workflows on site.
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FAQs
The 3MM320RRL supports secondary breakers listed as CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, and CVH2_XMM. The main circuit breaker determines the interrupt rating, with a bus rating of 800 A and a 200 A main option. When planning a retrofit or new install, verify the main breaker rating aligns with the project’s load calculations and utility requirements.
The interrupt rating for the 3MM320RRL depends on the selected main circuit breaker. The unit provides an 800 A bus rating and 200 A main capacity, so choose a main breaker that matches your service needs. For precise interrupt levels, consult the Eaton specification sheet and ensure compatibility with your utility’s protection standards.
Yes. The 3MM320RRL is designed as a Group Metering module with three-phase in and single-phase out configuration, outdoor-rated enclosure, five-jaw, and three sockets. It supports 120/208 V operation and is UL Listed, with utility approvals that align with multi-tenant metering requirements, enabling efficient, scalable group metering for residential complexes.
The 3MM320RRL carries UL Listed certification and is backed by extensive utility approvals, including ME and Emera Maine among others. These certifications and approvals facilitate field acceptance and streamline utility interconnection, reducing project delays and ensuring compliance with safety and metering standards.
Warranty terms follow Eaton Selling Policy 25-000, offering one year from the date of installation or eighteen months from shipment, whichever occurs first. This coverage supports parts and workmanship, and Eaton provides standard manufacturer support and documentation through the product datasheet and customer portal to assist with installation and service inquiries.