Eaton 1MM420RRL Residential Meter Stack - UL Listed
Part Number: 1MM420RRL
Quick Summary
Eaton 1MM420RRL residential meter stack provides multi-metering for outdoor residential service entrances. Engineers often struggle to expand metering capacity while meeting weather, space, and code requirements. This UL Listed unit also leverages ME/VA/TX utility approvals, supporting fast site acceptance. With a robust 200 A rating, an 800 A bus, and 120/240 V capability, it enables quicker deployments, reduces field wiring, and lowers maintenance costs. The result is a durable, scalable solution from a trusted brand that aligns with modern metering strategies and procurement workflows.
Product Information
Extended Description
1MM420RRL 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, Ringless, 120/240 Vac, 4-jaw
Product Name
Eaton residential meter stack
Catalog Number
1MM420RRL
UPC
786849052126
Product Length/Depth
7.01 in
Product Height
64.5 in
Product Width
13.5 in
Product Weight
78 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 - 1MM420RRL
Feature: High amperage 200 A rating with an 800 A bus rating. Business impact: Enables service feeds for multiple meters without compromising conductor sizing, reducing panel upgrades and future rewiring. Application: Ideal for residential meters serving multi-tenant or mixed-use homes where capacity is a constraint and code compliance is critical. Feature: Outdoor aluminum enclosure, ringless design, and weather-resistant construction. Business impact: Improves durability against corrosion and weathering, extending service life and lowering enclosure maintenance costs. Application: Outdoor meter stacks at building perimeters, carports, or utility easements where environmental exposure is a factor. Feature: Single-phase in/out with 4 sockets and 4-jaw connections. Business impact: Simplifies field termination and reduces install time, translating to lower labor costs. Application: Common in single-phase residential service entrances requiring efficient meter clustering. Feature: Interruption rating depends on the chosen main circuit breaker. Business impact: Provides installer flexibility to tailor protection level and fault interruptions to meet project specs. Application: Projects requiring bespoke main breaker integration for staged interconnection. Feature: UL Listed with extensive utility approvals. Business impact: Accelerates utility interconnection and inspection processes, reducing project escalation. Application: ME, VA, TX, and other listed utilities; supports rapid interconnection across multiple regions.
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FAQs
For outdoor installations, ensure proper clearance, weatherproof mounting, and secure enclosure anchoring. Verify the 120/240 V supply wiring, four socket terminations, and four-jaw connections are accessible for maintenance. Plan for adequate space around the unit to accommodate service disconnects and future metering needs, while following local code requirements and utility interconnection guidelines.
The unit features a 200 A amperage rating, 800 A bus rating, 120/240 V, single-phase in/out, aluminum outdoor enclosure, four sockets, and four-jaw terminations. Interruption rating depends on the main circuit breaker selected, and the catalog number is 1MM420RRL with UL Listed certification for safety and compliance.
Yes. The product includes extensive utility approvals including ME, VA, and TX among others, which streamline interconnection approvals and utility acceptance. Always verify specific utility requirements for your project and coordinate with the local authority having jurisdiction to ensure a smooth connection process.
Warranty is governed by Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This protects against manufacturing defects and supports replacement or repair timelines, reducing project risk while ensuring long-term metering reliability.
It enables multi-metering in a single outdoor enclosure with durable weatherproofing, quick installation, and certified utility compatibility. The combination of 200 A service, 800 A bus, and 120/240 V operation reduces field labor, supports scalable capacity for future growth, and improves compliance with safety and utility standards.