Eaton 37MM140R1240 Commercial Meter Stack - UL Listed
Part Number: 37MM140R1240
Quick Summary
Eaton 37MM140R1240 commercial meter stack provides compact, three-phase metering for commercial power distribution. Engineers face pressure to maximize space while maintaining safety and accurate phase balance in limited panel footprints. This UL Listed meter stack addresses those challenges with a rugged aluminum bus, lever bypass for quick maintenance, and a documented 400A capacity fed through three-phase in and out. The design supports 208Y/120V systems and factory A-B phase balance, while ringless security helps reduce tampering risk. By combining robust hardware with Eaton's metering expertise, the solution streamlines installation, improves reliability, and lowers total cost of ownership for mid-size facilities. It integrates smoothly with existing power management and distribution strategies to support scalable growth and compliance.
Product Information
Extended Description
37MM140R1240 Eaton: Eaton's 37MM Three-Phase Commercial Meter Stack Modules, 400A, Lever bypass, Aluminum Bus 1200 Ampere, 1 Socket, Factory A-B Phase Balance, Three-phase in, three-phase out, Seven-jaws, 208Y/120V , Ringless Security
Product Name
Eaton 35MM commercial meter stack
Catalog Number
37MM140R1240
UPC
782114754450
Product Length/Depth
8.75 in
Product Height
52.63 in
Product Width
18.25 in
Product Weight
133 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
Commercial Meter Stack
Utility approvals
AL : Alabama Power IL : Ameren MO : Ameren IA : Alliant (IP&L and WP&L) WI : Alliant (IP&L and WP&L) MI : Consumers Energy NC : Dominion VA : Dominion ME : Emera Maine (Bangor Hydro Electric Co./ Maine Public Service Company) 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 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 FL : Tallahassee City 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 PA : Pennsylvania Power & Light (PPL) NY : Rochester Gas & Electric (RG&E) NY : New York State Electric & Gas (NYSEG) TX : CenterPoint Energy (HL&P/Reliant) MD : Baltimore Gas and Electric
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM140R1240
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Compact 37MM footprint with a 400A rating translates to space savings and easier integration into dense electrical rooms. Business Impact: Optimizes panel planning, reduces enclosure costs, and accelerates retrofits for commercial facilities. Application: Ideal for mid-size commercial buildings and light industrial sites that require dependable metering without expanding rack space. Long-tail keywords: three-phase metering, commercial meter stack, metering products.Feature: Lever bypass enables fast, safe maintenance without disconnecting the load. Business Impact: Minimizes downtime and protects maintenance personnel during service tasks. Application: Service entrances and metered feeders where uptime matters and outages are costly. Long-tail keywords: lever bypass, safe maintenance, uptime improvement.Feature: Aluminum bus rated to 1200A supports higher fault tolerance and future expansion. Business Impact: Reduces upgrade costs and supports demand growth without replacing equipment. Application: Facilities planning for peak demand, retail centers, and data-adjacent loads. Long-tail keywords: aluminum bus, 1200A rating, fault tolerance.Feature: Three-phase in, three-phase out with seven jaws and 208Y/120V capability; ringless security for tamper resistance. Business Impact: Flexible wiring, secure operation, and simplified installation in complex distribution schemes. Application: Commercial metering deployments needing versatile phase configuration and enhanced security. Long-tail keywords: 208Y/120V, seven jaws, ringless security.Feature: UL Listed certification and compatibility with Eaton metering products. Business Impact: Streamlines procurement, validates safety compliance, and reduces field validation time. Application: Compliance-driven projects in power management and distribution environments. Long-tail keywords: UL Listed, metering compatibility, power management & distribution.
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FAQs
To install the 37MM140R1240, verify panel footprint compatibility and space within the enclosure. Mount the meter stack using the manufacturer’s guidelines, connect three-phase input and output conductors to the appropriate lugs, engage the seven-jaws, and re-check lever bypass alignment for safe maintenance access. Ensure UL Listed compliance and follow all site-specific wiring standards to minimize commissioning time.
Key ratings include a 400A maximum load, 208Y/120V operating voltage, three-phase in and three-phase out configuration, and a 1200A aluminum bus rating. The unit features seven-jaws and ringless security for secure, scalable metering. These specs support accurate power measurement and robust performance in commercial distribution systems.
Yes. The 37MM140R1240 is designed for commercial power management in offices and retail environments. Its compact footprint, three-phase metering capability, and 208Y/120V support make it suitable for mid-size facilities requiring reliable energy measurement, phase balance, and safe maintenance—without sacrificing space or service uptime.
The meter stack is UL Listed, ensuring safety compliance and compatibility with standard electrical codes. While other certifications may apply regionally, UL Listing provides assurance of safety and performance for commercial metering installations alongside Eaton’s metering product ecosystem.
Lever bypass enables quick, maintenance-friendly servicing, reducing downtime and extending service intervals. The aluminum bus and rugged construction support long life and higher fault tolerance, which lowers replacement frequency. Coupled with UL Listed compliance, this translates to lower total cost of ownership and smoother procurement through Eaton’s metering product family.