Eaton 1MM612R Residential Meter Stack - UL Listed
Part Number: 1MM612R
Quick Summary
Eaton 1MM612R residential meter stack is a centralized service-entrance metering solution for multi-tenant residential buildings and light commercial sites. It reduces field wiring errors and installation time by providing a compact, ready-to-install enclosure. This unit features a durable aluminum, indoor/outdoor enclosure with six sockets for reliable single-phase metering. It is UL Listed and designed to align with broad utility approvals, helping projects clear regulatory checks with confidence. For engineers and procurement teams, the Eaton meter stack delivers predictable commissioning, straightforward maintenance, and a clear path to scalable metering deployments across diverse projects.
Product Information
Extended Description
1MM612R Eaton: Eaton residential meter stack, Amperage rating: 125A, Bus rating: 800A, Indoor/Outdoor, Interrupt rating depends on selected main circuit breaker, Single-phase in/single-phase out, 6 Sockets, Aluminum, Ring, 120/240 Vac
Product Name
Eaton residential meter stack
Catalog Number
1MM612R
UPC
782116007271
Product Length/Depth
7.01 in
Product Height
66.5 in
Product Width
12.26 in
Product Weight
76 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
NC : Dominion VA : Dominion MI : DTE Energy (Detroit Edison) AR : Entergy LA : Entergy MS : Entergy TX : Entergy ID : Idaho Power OR : Idaho Power WA : Seattle City Light AK : Anchorage Municipal Light & Power NV : NV Energy MT : NorthWestern Energy NE : NorthWestern Energy SD : NorthWestern Energy WY : NorthWestern Energy MD : Baltimore Gas and Electric DC : PEPCO MD : PEPCO WA : Puget Sound Energy WA : Tacoma Public Utilities
Interrupt rating
Depends on selected main circuit breaker
Enclosure
Indoor/outdoor
Bus Rating
800 A
Phase
Single-phase in, single-phase out
Voltage rating
120/240 V
Amperage Rating
125A
Guidance to comply with NEC 230.71 for service entrance equipment installation in garden-style apartments
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM612R
Feature → Business Impact → Application: 125A amperage rating with an 800A bus rating supports typical residential and light commercial service loads, enabling a compact footprint without compromising protection. This translates to reduced equipment staging, faster installation, and lower on-site labor costs during initial metering installs or upgrades. Application: multi-tenant buildings and apartment complexes where centralized metering accelerates commissioning while maintaining accurate, isolated sub-circuits. Feature → Business Impact → Application: Indoor/outdoor aluminum enclosure provides rugged durability and corrosion resistance, delivering long service life in varied environments. Benefit: reduced maintenance cycles and lower lifecycle costs for facilities with outdoor meter stacks or exposed installs. Application: weather-exposed sites and utility-approved deployments. Feature → Business Impact → Application: Six sockets with single-phase in/out supports efficient, scalable metering for up to six service points from a single stack. Benefit: simplified wiring diagrams, faster relocations, and easier future expansions. Application: campus-style housing or mixed-use developments. Feature → Business Impact → Application: UL Listed certification plus extensive utility approvals streamline regulatory compliance and approvals. Benefit: faster permit processing and reduced project risk. Application: new builds and retrofits requiring validated safety and utility compatibility. Feature → Business Impact → Application: Interrupt rating depends on the chosen main circuit breaker, providing design flexibility to meet exact fault-current requirements. Benefit: precise coordination with protective devices and optimized protection schemes. Application: system designers selecting main breakers for tailored protection. Feature → Business Impact → Application: Warranty coverage (Eaton policy 25-000) along with Eaton support documents ensures ongoing reliability. Benefit: predictable maintenance budgeting and quick access to technical resources. Application: service contracts and long-term asset management.
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FAQs
The 1MM612R requires a suitable mounting surface for the six-socket metal enclosure and room for the indoor/outdoor rated aluminum housing. Ensure clearances per local codes, plan for single-phase in/out wiring, and select a main circuit breaker that provides the desired interrupt rating. Review the utility approvals for your jurisdiction and reference Eaton’s installation guidelines to minimize commissioning delays.
This stack supports six sockets for single-phase service with a 125A rating and an 800A bus rating, rated for 120/240 V. It is designed for centralized service entrance metering in multi-tenant environments, enabling shared infrastructure while preserving individual service integrity. Installation should align with NEC guidelines and local utility requirements for metering configurations.
Yes, the unit is UL Listed and accompanied by broad utility approvals to support project execution. Utilities commonly referenced include Dominion, Entergy, Idaho Power, NV Energy, Puget Sound Energy, Seattle City Light, Baltimore Gas and Electric, and PEPCO, among others. Always verify the current utility list for your project location and coordinate with the authority having jurisdiction during procurement.
Eaton provides a standard warranty under policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. In addition to warranty, Eaton offers product specifications, datasheets, and application notes to support design decisions and maintenance planning, ensuring access to technical resources throughout the asset lifecycle.
Interrupt rating is determined by the main circuit breaker you install with the meter stack. This enables you to tailor protection to the calculated fault currents of your installation. When selecting the breaker, confirm compatibility with the 125A stack, the 800A bus rating, and the 120/240 V system voltage to ensure proper coordination, safe operation, and compliance with local utility requirements.