Eaton 3MM612R Meter Stack for Residential - UL Listed
Part Number: 3MM612R
Quick Summary
Eaton 3MM612R Residential Meter Stack is a compact, three-phase metering solution designed for group metering in multi-unit buildings. This enclosure addresses common field challenges like tight spaces, indoor/outdoor exposure, and safe, code-compliant wiring by delivering a durable aluminum bus and a scalable breaker arrangement. UL Listed certification supports safety and reliability across many utility programs, while the product’s utility approvals list enhances deployment flexibility. With a 125A amperage rating, an 800A bus rating, and a 120/208V voltage profile, this meter stack enables efficient energy management. The design also emphasizes ease of installation and long-term reliability, aligning with energy efficiency and operational cost-reduction goals.
Product Information
Extended Description
3MM612R Eaton: Eaton's Three-Phase Residential Meter Stack Module, Group Metering Type, 125A, Aluminum Bus 800 Ampere, No bypass, Indoor/outdoor, Five-jaws, 6 Sockets, Three-phase in, single-phase out, Ring Security, 120/208V
Product Name
Eaton residential meter stack
Catalog Number
3MM612R
UPC
786849052331
Product Length/Depth
55.5 in
Product Height
8 in
Product Width
15 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
Group Metering
Utility approvals
NC : Dominion VA : Dominion MI : DTE Energy (Detroit Edison) 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
Secondary circuit breaker
BR2_, BRH2_, BRHH2_
Bus Rating
800 A
Phase
Three-phase in, single-phase out
Voltage rating
120/208V
Amperage Rating
125A
Bus material
Aluminum
Bypass
None
Number of jaws
Five-jaw
Number of sockets
6
Phase balance
A-B
Security
Ring
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM612R
Feature → Business Impact → Application: Three-phase in, single-phase out design reduces wiring complexity and enables unified metering across multiple circuits, delivering simplified installations and improved load measurement accuracy for multifamily and light-commercial properties. Application: group metering for residential buildings and small commercial complexes. Feature → Business Impact → Application: 800 A bus rating with a 125 A amperage rating provides robust headroom, enabling future expansion without service interruptions. Application: scalable metering for growing energy demand in multi-tenant facilities. Feature → Business Impact → Application: Aluminum bus material offers corrosion resistance and lighter weight compared with alternatives, improving installation ease and long-term durability. Application: outdoor/indoor environments with temperature variation. Feature → Business Impact → Application: Indoor/outdoor enclosure with five jaws and six sockets supports flexible wiring and modularity, enabling versatile layouts and straightforward maintenance. Application: multi-meter banks in residential and light-commercial settings. Feature → Business Impact → Application: No bypass design enhances metering integrity and tamper resistance, improving safety and regulatory compliance. Application: building metering where tamper resistance is critical. Feature → Business Impact → Application: Compatibility with BR2, BRH2, BRHH2 secondary breakers and a range of main breakers provides broad protection options. Application: customizable protection schemes and straightforward upgrades. Feature → Business Impact → Application: Utility approvals across multiple regions enable smoother project approvals and deployment. Application: projects requiring utility-sanctioned metering installations for rapid permitting.
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FAQs
Yes. The 3MM612R supports secondary breakers BR2_, BRH2_, and BRHH2_, providing flexible protection options and straightforward commissioning in group metering configurations.
The unit is rated for 125A, with an 800A bus rating, operates at 120/208V, and supports three-phase in with single-phase out. It includes five jaws and six sockets to accommodate multiple metering connections.
The enclosure is designed for indoor/outdoor use, offering durable operation across varied environmental conditions while maintaining metering integrity.
Utility approvals cover a broad set of regional utilities listed in Eaton documentation, including major providers across several states and jurisdictions, enabling smoother permit and interconnection processes for group metering installations.
Warranty is Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first, with standard maintenance and support expectations aligned to Eaton metering products.