Eaton 37MM240R1240 Three-Phase Meter Stack - UL Listed
Part Number: 37MM240R1240
Quick Summary
Eaton 37MM240R1240 Three-Phase Meter Stack is a high-capacity metering solution for commercial and light-industrial power panels. Engineers and procurement teams often struggle with space constraints, complex wiring, and downtime when upgrading multi-tenant metering, making reliable, modular solutions essential. UL Listed certification ensures safety and code compliance, while the 1200 A bus rating and 400 A socket capability match common commercial service needs. Designed for straightforward installation, this meter stack streamlines commissioning, improves energy visibility, and supports scalable power management across growing facilities. Ideal for data centers, office parks, and light manufacturing environments where accurate billing and reliability matter.
Product Information
Extended Description
37MM240R1240 Eaton: Eaton 37MM Three-Phase Commercial Meter Stack Modules, 400A, Aluminum Bus 1200 Ampere, Lever bypass Seven-jaws 2 Socket Three-phase in, three-phase out, Factory A-B Phase Balance, Ringless Security , 400 Ampere Socket Ampere 208Y/120V
Product Name
Eaton commercial meter stack
Catalog Number
37MM240R1240
UPC
782116107865
Product Length/Depth
8.75 in
Product Height
52.63 in
Product Width
18.25 in
Product Weight
177 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
AL : Alabama Power IA : Alliant (IP&L and WP&L) WI : Alliant (IP&L and WP&L) MI : Consumers Energy NC : Dominion VA : Dominion NM : El Paso Electric TX : El Paso Electric 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
Bus Rating
1200 A
Number of jaws
Seven-jaw
Amperage Rating
400A
Number of meter socket
2
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM240R1240
Feature → Business Impact → Application: The meter stack uses a seven-jaw design with two meter sockets and a 1200 A bus rating, delivering robust connection points and ample headroom for future load growth, reducing rework and interruption during capacity upgrades in large commercial facilities. This translates to shorter project timelines and lower lifecycle costs when powering multi-tenant complexes or retail campuses. Application: data centers, mixed-use campuses, and large office developments seeking reliable, scalable metering. Feature → Business Impact → Application: Amperage rating of 400 A per socket enables precise main metering without overfusing or oversizing feeders, improving protection coordination and energy accounting while minimizing initial equipment cost. This supports safer startups and lower energy loss in busy distribution zones. Application: general commercial power distribution and tenant metering. Feature → Business Impact → Application: Ringless security and lever bypass simplify maintenance and field servicing by reducing tamper risks and facilitating quick isolation of circuits, cutting downtime during inspections and metering recalibration. Application: routine utility billing checks and service window tasks in secured electrical rooms. Feature → Business Impact → Application: Factory A-B Phase Balance provides improved phase balance visibility, reducing neutral loading issues and enhancing billing accuracy across three-phase feeders. Application: high-occupancy office towers and retail centers with uneven phase loading. Feature → Business Impact → Application: Precise dimensions—52.63 in height, 18.25 in width, 8.75 in depth—with a 177 lb weight, allow predictable installation in standard electrical rooms and align with typical rack or wall-mount footprints. Application: retrofit projects and new builds with predefined space planning. Feature → Business Impact → Application: UL Listed certification delivers code compliance and safer integration in commercial metering installs, streamlining inspector acceptance and warranty coverage. Application: any regulated facility aiming to minimize compliance risk. Warranty information, 1 year from installation or 18 months from shipment, provides predictable support timelines for procurement and maintenance planning.
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FAQs
The 37MM240R1240 is designed for standard electrical room footprints and mounting configurations. With a height of 52.63 inches, width of 18.25 inches, and depth of 8.75 inches, it fits in common service areas while accommodating two meter sockets and a seven-jaw bus assembly. Ensure adequate clearance for service access and compliance with local electrical codes during retrofit or new installation.
Key specs include a 1200 A bus rating, 400 A amperage per socket, two meter sockets, and a seven-jaw design. The unit is intended for 208Y/120V three-phase systems and is UL Listed, supporting safe operation in commercial metering applications with scalable capacity for future growth.
Yes. The Eaton 37MM240R1240 is designed for three-phase 208Y/120V distribution. Its 1200 A bus rating and dual meter sockets provide reliable metering and load tracking for commercial buildings, data centers, and other installations requiring accurate, scalable three-phase metering with straightforward wiring.
The product is UL Listed, ensuring code compliance and safety for commercial metering installations. This certification supports inspector acceptance, proper interconnection practices, and alignment with safety standards essential for shared or tenant spaces in office complexes and retail centers.
Warranty is Eaton’s policy: one year from installation or eighteen months from shipment, whichever occurs first. ROI benefits come from reduced downtime, easier maintenance with lever bypass and ringless security, and scalable metering that minimizes future retrofit costs while improving energy billing accuracy.