Eaton 37MM240R1240C32 Commercial Meter Stack - UL Listed
Part Number: 37MM240R1240C32
Quick Summary
Eaton 37MM240R1240C32 commercial meter stack delivers plug-in metering for 3-phase, 400 A service. Facilities engineers often struggle with tight spaces, top/bottom/back exit options, and complex phase balancing during panel integration. UL Listed certification supports safety and compliance, while 208Y/120V network metering and copper bus enable accurate, scalable monitoring. Designed for commercial and light-industrial power distribution, this stack aligns with metering product ecosystems and installation best practices. Typical deployments benefit from a 400A main socket, with a 300A and 250A breaker configuration and a lever bypass for rapid field maintenance. The unit supports top, bottom, or back feeder exits, and outdoor installations can use rainproof hubs when exiting at the top, aligning with weatherproofing best practices.
Product Information
Extended Description
37MM240R1240C32 Eaton: Eaton commercial meter stack, 37MM-3-Phase, 400A, Copper Bus, K-frame (1) 300A and (1) 250A breaker installed, 400A socket, 208Y/120V, Ringless, Al 1200A bus, Lever bypass, Seven-jaws, 2 sockets, Factory A-B phase balance
Product Name
Eaton 35MM commercial meter stack
Catalog Number
37MM240R1240C32
UPC
786689213190
Product Length/Depth
66.625 in
Product Height
8.75 in
Product Width
19.375 in
Product Weight
320 lb
Certifications
UL Listed
Catalog Notes
Main tenant feeders can exit top, bottom, or back, If being used in outdoor application and exiting the top, mount Myer type hubs on rainproof cap. 120/240V, single-phase, three-wire systems and 208Y/120V network metering
Type
Plug-in socket
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM240R1240C32
Feature: Plug-in socket design enables quick metering module replacement without disconnecting main power. Business Impact: Reduces downtime and service interruption, improving maintenance efficiency and project turnaround. Application: Ideal for retrofit and new-build metering in commercial facilities, supporting rapid scoping and installation of 3-phase monitoring with minimal site disruption. Feature: 208Y/120V metering with copper bus and ringless configuration. Business Impact: Delivers accurate voltage monitoring and reduced contact resistance for reliable power measurement, which lowers energy waste and improves billable data quality. Application: Suitable for light-industrial and commercial feeders requiring precise multi-voltage metering with robust electrical paths. Feature: Included breakers (one 300A and one 250A) and a 400A socket. Business Impact: Efficiently accommodates varied load profiles while keeping main protection centralized, reducing inventory needs. Application: Supports common service configurations in mid-size facilities, enabling scalable protection budgets. Feature: Lever bypass and seven-jaws assembly. Business Impact: Facilitates safe, fast disconnection for testing and maintenance, minimizing system downtime. Application: Essential for field service teams performing periodic checks or metering upgrades in busy electrical rooms. Feature: Top, bottom, or back exit flexibility with rainproof cap option for outdoor use. Business Impact: Maximizes installation versatility and future-proofing, reducing rework in retrofit projects. Application: Practical for retrofit meters in crowded spaces or outdoor installations where routing of feeders varies by building design. Feature: Factory A-B phase balance. Business Impact: Improves load balancing accuracy, enhancing system efficiency and reducing uneven wear on equipment. Application: Critical for facilities needing consistent phase alignment across multiple meters and feeders. Feature: UL Listed certification. Business Impact: Provides recognized safety compliance, accelerating procurement and regulatory acceptance. Application: Widely adopted in commercial metering environments requiring validated safety standards.
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FAQs
The 37MM240R1240C32 is designed for commercial and light-industrial power distribution requiring 3-phase, 208Y/120V metering with a 400A main, including retrofit and new-build projects. It supports top, bottom, or back exit configurations and lever bypass for fast maintenance, enabling flexible installation in constrained electrical rooms.
Key specs include 3-phase metering, 400A socket, and a built-in arrangement with one 300A and one 250A breaker installed. It uses copper bus with a ringless design and factory A-B phase balance, ensuring accurate load measurement and balanced distribution across feeders.
Yes, outdoor installations are supported when exiting from the top using rainproof hubs. This enables weather-protected metering in exterior equipment rooms or weather-exposed enclosures, aligning with Eaton’s installation notes for outdoor metering configurations.
The unit is UL Listed, providing recognized safety certification that streamlines procurement and regulatory compliance for commercial metering. While CE or IP ratings are not specified in the data, UL Listing remains a critical assurance of electrical safety and reliable performance in distributed metering applications.
The lever bypass allows rapid isolation for testing or service without full shutdown, reducing downtime. Factory A-B phase balance improves measurement accuracy and load distribution, which leads to better energy billing integrity and lower operating costs over the life of the installation.