Eaton 1MM320RRL Residential Meter Stack - UL Listed
Part Number: 1MM320RRL
Quick Summary
Eaton residential meter stack is a rugged outdoor metering solution designed for single-phase residential installations. Installers often grapple with weather exposure and wiring constraints, making durable outdoor enclosures and straightforward main-breaker compatibility essential. This model carries UL Listed certification and broad utility approvals, supporting safe, compliant connections across multiple utilities. By combining an outdoor aluminum enclosure with a compact, install-friendly footprint, it delivers faster commissioning, improved reliability, and lower total cost of ownership for contractors and utilities alike.
Product Information
Extended Description
1MM320RRL Eaton: Eaton residential meter stack, Amperage rating: 200A, Bus rating: 800A, Outdoor, Interrupt rating depends on selected main circuit breaker, Single-phase in/single-phase out, 3 Sockets, Aluminum, Ringless, 120/240 Vac, 4-jaw
Product Name
Eaton residential meter stack
Catalog Number
1MM320RRL
UPC
786849052119
Product Length/Depth
7.01 in
Product Height
52.35 in
Product Width
13.5 in
Product Weight
60 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
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 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
Bus Rating
800 A
Phase
Single-phase in, single-phase out
Voltage rating
120/240 V
Amperage Rating
200A
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM320RRL
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: The 1MM320RRL supports a 200A amperage rating with an 800A bus rating, enabling safe, scalable service for typical residential loads while accommodating future upgrades. This translates to fewer field changes and longer service life for multi-tenant or expanding single-family developments. Application-wise, its single-phase in/out design with 120/240V operation and 3 sockets suits standard residential metering, reducing wiring complexity and downtime during installation. Feature → Business Impact → Application: Outdoor, ringless aluminum enclosure provides weather resistance and corrosion resistance, lowering maintenance costs and extending service life in harsh environments. This is ideal for outdoor meter stacks serving exterior walls or detached service cabinets, delivering dependable performance year-round. Feature → Business Impact → Application: UL Listed certification confirms safety compliance, while the 52.35 in height, 13.5 in width, and 7.01 in depth footprint supports compact installations in restricted spaces without compromising accessibility. This enables faster integration into existing utility rooms or exterior meter enclosures with minimal site modification. Feature → Business Impact → Application: Utility approvals across multiple regions (e.g., ME, NC, VA, TX, FL, IN) simplify permit acquisition and interconnection, reducing project timelines and risk of rejection during utility interconnection reviews. Application includes multi-state residential or small-commercial projects needing broad utility acceptance. Feature → Business Impact → Application: Interrupt rating is determined by the selected main circuit breaker, giving engineering teams precise control over short-circuit performance and protection coordination. This flexibility supports custom system design while ensuring safety and compliance. Feature → Business Impact → Application: 200A service with 4-jaw, ringless mounting simplifies installation and maintenance, enabling quick exchange or upgrades of main breakers and metering components with minimal disruption to ongoing service. This is particularly valuable for retrofit projects and rental properties where uptime matters.
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FAQs
The 1MM320RRL is designed for outdoor, single-phase residential metering with 120/240 V operation, a 200 A amperage rating, and an 800 A bus rating. It supports three sockets in a ringless aluminum enclosure, making it ideal for exterior meter installations on single-family homes or small multi-tenant buildings.
The interrupt rating is dependent on the main circuit breaker selected for the installation. To achieve the desired protection level, pair the meter stack with a main breaker that matches the required interrupt rating and complies with local utility requirements.
Yes. The 1MM320RRL carries broad utility approvals (examples include ME, NC, VA, TX, FL, IN, and others listed in the product data), helping streamline interconnection approvals and reducing project lead times for multi-region deployments.
The unit stands 52.35 inches tall, 13.5 inches wide, and 7.01 inches in depth, with an approximate weight of 60 lb. The outdoor enclosure design and size are optimized for exterior mounting and ease of service access.
Warranty falls under Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This provides protection against manufacturing defects while ensuring access to Eaton’s technical support and replacement parts if needed.