Eaton 1MM420R Residential Meter Stack - UL Listed
Part Number: 1MM420R
Quick Summary
The Eaton 1MM420R residential meter stack is a compact, outdoor-ready power distribution solution for single-family and multi-dwelling applications. Owners and contractors often grapple with weatherproofing, space constraints, and metering compatibility; this stack addresses those challenges by combining a rugged outdoor enclosure, durable aluminum construction, and standard metering interfaces. It carries UL Listed safety certification and is designed to align with broad utility approvals, ensuring project acceptance and simplified commissioning. The product also supports a clear service rating of 200 A at 120/240 V, with straightforward installation and long-term reliability for modern metering needs. In short, it pairs performance with compliance, helping teams deliver faster, compliant metering outcomes.
Product Information
Extended Description
1MM420R 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, 4 Sockets, Aluminum, Ring, 120/240 Vac, 4-jaw
Product Name
Eaton residential meter stack
Catalog Number
1MM420R
UPC
786849051952
Product Length/Depth
7.01 in
Product Height
64.5 in
Product Width
13.5 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
Multiple metering
Utility approvals
AL : Alabama Power DC : Atlantic City Electric / Delmarva (Connectiv) DE : Atlantic City Electric / Delmarva (Connectiv) MD : Atlantic City Electric / Delmarva (Connectiv) NJ : Atlantic City Electric / Delmarva (Connectiv) TX : CenterPoint Energy (HL&P/Reliant) NC : Dominion VA : Dominion MI : DTE Energy (Detroit Edison) NM : El Paso Electric TX : El Paso Electric MO : Empire District Electric OK : Empire District Electric AR : Entergy LA : Entergy MS : Entergy TX : Entergy CA : City of Los Angeles - DWP (LADWP) AZ : Southern California Edison CA : Southern California Edison CA : Pacific Gas and Electric (PG&E) CA : Sacramento Municipal Utility District (SMUD) TN : Nashville Electric Service CA : PacifiCorp/Pacific Power/Rocky Mountain Power ID : PacifiCorp/Pacific Power/Rocky Mountain Power OR : PacifiCorp/Pacific Power/Rocky Mountain Power UT : PacifiCorp/Pacific Power/Rocky Mountain Power WA : PacifiCorp/Pacific Power/Rocky Mountain Power WY : PacifiCorp/Pacific Power/Rocky Mountain Power HI : Hawaiian Electric MT : NorthWestern Energy NE : NorthWestern Energy SD : NorthWestern Energy WY : NorthWestern Energy MD : Baltimore Gas and Electric DC : PEPCO MD : PEPCO AZ : Tucson Electric Power/ UniSource AZ : Sulphur Springs Valley Electric Coop IN : Indianapolis Power and Light (IP&L)
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 - 1MM420R
Outdoor meter stacks must endure harsh weather while delivering reliable metering interfaces. The 1MM420R uses an outdoor aluminum enclosure, measuring 64.5 in high by 13.5 in wide and 7.01 in deep, with a 102 lb weight, delivering robust durability and installation versatility for exposed environments. This translates to reduced maintenance calls and extended lifecycle in outdoor service areas, enabling faster deployments on residential or light commercial projects. Amperage rating of 200 A and a bus rating of 800 A provide the capacity needed for typical residential service entrances while maintaining safe, single-phase in/single-phase out operation at 120/240 V, which simplifies integration with standard distribution panels. Type is Multiple metering with 4 sockets and a 4-jaw ring connection, supporting multi-meter configurations and tenant metering with a compact footprint. Interruption rating depends on the main circuit breaker selected, giving designers flexibility to meet specific utility and code requirements. The product’s UL Listed status and a one-year warranty (or eighteen months from shipment) contribute to risk reduction and predictable maintenance planning, while the broad utility approvals list helps with project acceptance. Compatibility with Eaton metering products and standard utility interfaces makes procurement straightforward, with a proven path to compliant installations and faster commissioning for residential metering programs.
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FAQs
The 1MM420R is designed for outdoor installation with a rugged aluminum enclosure. It supports single-phase in/out at 120/240 V and four metering sockets with a four-jaw ring for reliable connections. When integrating with existing service equipment, ensure the main breaker selection matches your system design and verify utility approvals for the installation site before final commissioning.
The interrupt rating is determined by the main circuit breaker you select for the installation. This design approach allows you to tailor the protection level to your system while the meter stack provides the necessary metering interface and outdoor enclosure. Plan breaker sizing to meet local codes and utility requirements for your service.
Yes. The unit is specified as Multiple metering with 4 sockets and a 4-jaw ring, which supports multi-meter configurations. Its outdoor aluminum enclosure, 120/240 V single-phase input/output, and broad utility approvals make it a practical choice for multi-tenant residential projects while remaining compatible with standard metering interfaces.
The 1MM420R carries UL Listed certification, confirming compliance with recognized safety standards for electrical equipment. This certification is critical for utility acceptance, building codes, and insurance requirements, ensuring safer operation in outdoor environments and smoother project approvals for residential metering installations.
The outdoor aluminum enclosure and rugged construction offer long-term durability with minimal maintenance. A weight of 102 lb indicates a solid, stable installation, and the one-year warranty (or 18 months from shipment) reduces risk for early-life failures. Together with utility-approval readiness, this can lower lifecycle costs and reduce unexpected downtime for metering systems.