Eaton 37MM140R1240350 commercial meter stack - UL Listed
Part Number: 37MM140R1240350
Quick Summary
Eaton commercial meter stack is a three-phase metering assembly designed for commercial power distribution. Engineers often face challenges achieving reliable phase balance while integrating metering into existing bus systems under tight project timelines. This UL Listed solution delivers a 400A amperage rating with a 1200A bus and factory A-B phase balance, featuring a ringless aluminum bus and seven-jaw meter socket for robust performance. With a single 1-socket design and a footprint that fits traditional distribution layouts, it streamlines procurement and installation. For facilities pursuing efficiency, safety, and regulatory compliance, this meter stack offers measurable business value through faster commissioning and predictable long-term operation.
Product Information
Extended Description
37MM140R1240350 Eaton: 37MM-Three-Phase Commercial Meter Stack Modules, 400A, K-frame included secondary breaker, 400A socket, 208Y/120V, Ringless, Aluminum 1200A bus, 350A breaker trip, Lever bypass, Seven-jaws, 1 socket, Factory A-B phase balance
Product Name
Eaton commercial meter stack
Catalog Number
37MM140R1240350
UPC
782116995462
Product Length/Depth
52.63 in
Product Height
8.75 in
Product Width
18.25 in
Product Weight
218 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
Bus Rating
1200 A
Number of jaws
Seven-jaw
Amperage Rating
400A
Number of meter socket
1
Feature: 400A amperage rating → Business Impact: supports high-demand three-phase feeders with reliable protection and accurate metering → Application: commercial facilities requiring strong fault tolerance and precise energy measurement. Feature: 1200A bus rating → Business Impact: accommodates high fault currents and future load growth without reconfiguration → Application: utilities and large commercial sites with expanding power needs. Feature: 1 meter socket with seven-jaw design → Business Impact: simplifies wiring and reduces installation complexity, lowering project risk → Application: streamlined metering integration in new or retrofit installations. Feature: Ringless aluminum bus system → Business Impact: lighter weight for easier handling, corrosion resistance, and faster assembly → Application: installation teams benefit from shorter crane and routing times. Feature: Factory A-B phase balance → Business Impact: improved phase alignment reduces neutral loading and energy losses → Application: precise metering for balanced distribution in multi-tenant facilities. Feature: UL Listed certification → Business Impact: ensures compliance, safety, and regulatory acceptance → Application: procurement and commissioning teams gain confidence for code-adherence projects.
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FAQs
This Eaton meter stack is designed for 208Y/120V services with a 1200A bus and seven-jaw socket. The ringless aluminum bus and a single meter socket simplify retrofits and new installations, reducing wiring complexity and enabling smoother integration with standard distribution panels and modular switchgear.
Key specs include a 400A amperage rating, 1200A bus rating, 1 meter socket, seven-jaw configuration, 52.63 in length, 8.75 in height, and 18.25 in width, designed for three-phase commercial metering at 208Y/120V. UL Listed certification confirms compliance with safety and industry standards.
It's ideal for commercial power distribution where a single, reliable metering point is needed for three-phase systems. Use cases include office complexes, retail centers, and light-industrial facilities that require accurate energy measurement, phase balance, and ease of installation in retrofit or greenfield projects.
The unit is UL Listed, providing recognized safety certification for electrical components. It carries Eaton’s warranty policy (25-000) with coverage for one year from installation or eighteen months from shipment, whichever occurs first, supporting maintenance planning and total-cost-of-ownership considerations.
With a compact footprint and a single metering socket, installation time is reduced and commissioning becomes more predictable. The high bus rating supports growth, while UL compliance minimizes regulatory risk, leading to lower ongoing maintenance costs and a faster return on investment for commercial distribution projects.