Eaton 37MM120R12 Commercial Meter Stack - UL Listed
Part Number: 37MM120R12
Quick Summary
The Eaton 37MM120R12 commercial meter stack provides centralized three-phase metering for commercial power distribution. Engineers often struggle with compact footprints, phase balance, and secure bypass during maintenance. UL Listed certification underpins safety and reliability in demanding building projects. This solution delivers a compact, rugged enclosure with three-phase in and out, factory A-B phase balance, and ringless security, helping ensure code compliance and fast serviceability. By integrating with common utility approvals and Eaton metering heritage, it simplifies procurement, installation, and ongoing maintenance while reducing total cost of ownership for data centers, office campuses, and industrial facilities. Its UL certification and metering versatility support scalable upgrades across growing facilities.
Product Information
Extended Description
37MM120R12 Eaton: Eaton's 37MM Three-Phase Commercial Meter Stack Modules, 225A, Aluminum Bus 1200 Ampere, Lever bypass, Seven-jaws, 1 Socket, Three-phase in, three-phase out, Factory A-B Phase Balance, Ringless Security , 225 Ampere Socket Ampere, 208Y/120V
Product Name
Eaton commercial meter stack
Catalog Number
37MM120R12
UPC
786849052881
Product Length/Depth
8.75 in
Product Height
25.38 in
Product Width
18.25 in
Product Weight
98 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
Utility approvals
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) AL : Alabama Power IL : Ameren MO : Ameren IA : Alliant (IP&L and WP&L) WI : Alliant (IP&L and WP&L) DC : Atlantic City Electric / Delmarva (Connectiv) DE : Atlantic City Electric / Delmarva (Connectiv) MD : Atlantic City Electric / Delmarva (Connectiv) NJ : Atlantic City Electric / Delmarva (Connectiv) MD : Baltimore Gas and Electric TX : CenterPoint Energy (HL&P/Reliant) ME : Central Maine Power IL : Commonwealth Edison (ComEd) / CECHA MI : Consumers Energy OH : Dayton Power and Light (DP&L) ME : Emera Maine (Bangor Hydro Electric Co./ Maine Public Service Company) MO : Empire District Electric OK : Empire District Electric AR : Entergy LA : Entergy MS : Entergy TX : Entergy MD : First Energy (Potomac Edison) VA : First Energy (Potomac Edison) WV : First Energy (Mon Power) NJ : First Energy (Jersey Central Power and Light) OH : First Energy (Ohio Edison, Toledo Edison, The Illuminating Company) PA : First Energy (Allegheny Power, MET ED, Penelec, West Penn Power) GA : Georgia Power KS : Kansas City Power and Light (KCPL) / Westar Energy MO : Kansas City Power and Light (KCPL) / Westar Energy FL : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) IN : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) KY : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) NC : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) OH : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) SC : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) TN : Middle Tennessee EMC TN : Nashville Electric Service IN : Northern Indiana Public Service Company (NIPSCO) NY : Orange & Rockland Utilities PA : PECO Energy NY : PSE&G Long Island NM : Public Service Company of New Mexico (PNM) FL : Tallahassee City Electric CT : United Illuminating (UI) WI : WE Energies / Wisconsin Public Service (WPS) PA : Pennsylvania Power & Light (PPL) SC : South Carolina Electric and Gas (SCE&G) NY : Rochester Gas & Electric (RG&E) CT : Eversource (Connecticut Light and Power Co./Nstar/PSC New Hampshire/Western Mass Electric) MA : Eversource (Connecticut Light and Power Co./Nstar/PSC New Hampshire/Western Mass Electric) NH : Eversource (Connecticut Light and Power Co./Nstar/PSC New Hampshire/Western Mass Electric) CO : Xcel Energy MI : Xcel Energy MN : Xcel Energy ND : Xcel Energy NM : Xcel Energy SD : Xcel Energy TX : Xcel Energy WI : Xcel Energy MT : NorthWestern Energy NE : NorthWestern Energy SD : NorthWestern Energy WY : NorthWestern Energy KY : Louisville Gas & Electric/Kentucky Utilities DC : PEPCO MD : PEPCO IN : Indianapolis Power and Light (IP&L) NC : Dominion VA : Dominion
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM120R12
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Centralized three-phase metering consolidates energy measurement into a single, traceable point. Business impact: it reduces the need for multiple metering accessories and simplifies energy data capture for billing, submetering, and demand management. Application: ideal for commercial office towers, data centers, and retail complexes where accurate, fast metering influences energy cost control. Feature: 225 A socket with a 1200 A aluminum bus rating supports heavy commercial loads without frequent upgrades. Business impact: customers can stage capacity for growth and avoid intermediate panel changes, lowering total cost of ownership. Application: suitable for large service entrances and three-phase main distribution in mid-to-large facilities. Feature: Lever bypass, seven-jaws, and a single socket configuration simplify installation and maintenance. Business impact: technicians can perform safe, rapid bypass testing and service without exposing the entire system, reducing downtime. Application: installation in new builds or retrofit projects where service continuity is critical. Feature: Factory A-B Phase Balance and Ringless Security reduce loading imbalance and deter tampering while preserving enclosure integrity. Business impact: more stable voltages, balanced feeders, and guarded metering interfaces lead to longer equipment life and fewer nuisance faults. Application: critical facilities like hospitals, data centers, and high-demand commercial campuses. Feature: UL Listed status and extensive utility approvals support regulatory compliance and project acceptance. Business impact: procurement teams face fewer compliance hurdles, faster approvals, and smoother integration with Eaton's metering ecosystem. Application: broad deployments across multi-utility markets and turnkey projects. Installation and compatibility: With dimensions of 18.25 in width, 25.38 in height, and 8.75 in depth, and a weight of 98 lb, the meter stack fits standard commercial enclosures and aligns with utility metering practices. Our team can advise on field wiring, enclosure selection, and interconnection to existing three-phase circuits.
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FAQs
Install in a standard commercial enclosure using the 18.25 in width, 25.38 in height, and 8.75 in depth footprint. The unit weighs 98 lb and supports three-phase in/out with lever bypass for maintenance. Ensure proper clearance and follow UL Listed guidelines during wiring and commissioning.
The meter stack provides a 225 A socket, a 1200 A aluminum bus, and 208Y/120V three-phase in/out. It includes seven-jaws and a single socket configuration, enabling robust three-phase metering for medium-to-large commercial loads.
Yes, the 37MM120R12 is UL Listed, confirming electrical safety and reliability. It also aligns with wide utility approvals across multiple markets, supporting deployment in diverse utility regions and streamlining project approval processes.
The product carries Eaton's policy: one year from the date of installation or eighteen months from the date of shipment, whichever occurs first.
Ideal for commercial buildings, data centers, office campuses, and industrial facilities requiring centralized three-phase metering, balanced phases, and secure maintenance access.