Eaton commercial meter stack 37MM140HR1240K - UL Listed
Part Number: 37MM140HR1240K
Quick Summary
Eaton commercial meter stack is a modular three-phase metering solution for industrial and commercial power distribution on 208Y/120V systems. In space-constrained panels, integration options and code-compliant termination can slow installation and complicate maintenance. This unit carries UL Listed certification for electrical safety and dependable performance, with Eaton's standard warranty backing its service life. Designed for fast field installation, it supports top, bottom, or back exit configurations and features a 1200 A bus with a 400 A main breaker. The stack provides a single meter socket with seven jaws and a ringless design for clean terminations. For engineers and procurement teams, it enables scalable power management and faster project delivery while maintaining regulatory compliance.
Product Information
Extended Description
37MM140HR1240K Eaton: 37MM-Three-Phase Commercial Meter Stack Modules, 400A, K-frame included secondary breaker, 400A socket, 208Y/120V, Ringless, 1200A bus, Lever bypass, Seven-jaws, 1 socket, Factory A-B phase balance
Product Name
Eaton commercial meter stack
Catalog Number
37MM140HR1240K
UPC
782116303854
Product Length/Depth
48 in
Product Height
18 in
Product Width
40 in
Product Weight
145 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
Catalog Notes
Main tenant breakers can exit top, bottom or back. If being used in outdoor application and exiting the top, mount Myer type hubs on rainproof cap. 208Y/120V, three-phase, four-wire 240/120V, three-phase, four-wire delta
Bus Rating
1200 A
Number of jaws
Seven-jaw
Amperage Rating
400A
Number of meter socket
1
Feature: Top, bottom, or back exit capability enables flexible mounting to suit panel layout and outdoor installations. Impact: Reduces field rework andinstallation time, improving project schedules and on-site safety. Application: Ideal for commercial panels where space and routing constraints require adaptable termination options. Feature: 1200 A bus rating with a 400 A amperage rating supports heavy service while leaving room for future load growth. Impact: Enables scalable power management and mitigates the need for early cabinet upgrades. Application: Suitable for medium to large commercial and light industrial power distribution. Feature: One meter socket with seven-jaw design and ringless terminations. Impact: Simplifies wiring, minimizes termination errors, and lowers contact resistance for dependable metering accuracy. Application: Streamlines installation in high-density electrical rooms and retrofit projects. Feature: 208Y/120V, three-phase four-wire configuration. Impact: Delivers versatile power distribution for diverse equipment loads while maintaining balanced phase performance. Application: Common in commercial offices, data centers, and manufacturing spaces. Feature: UL Listed and Eaton warranty coverage. Impact: Provides regulatory confidence, reduces risk for owners, and supports long-term maintenance planning. Application: Compliance-driven procurement and service contracts across industrial facilities. Feature: Catalog notes for outdoor/top exit applications with rainproof hubs. Impact: Improves reliability in harsh environments and minimizes weather-related concerns during installation. Application: Outdoor feeders and subpanels where weather protection is essential.
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FAQs
The Eaton meter stack supports multiple exit configurations, allowing top, bottom, or back termination to match your panel geometry. This flexibility reduces field wiring conflicts, speeds up installation, and simplifies retrofits in existing housings while maintaining code compliance for three-phase distribution.
It delivers a dedicated 400A meter service with a 1200A bus and a single meter socket, designed for 208Y/120V four-wire systems. This combination supports balanced phase loading, reliable metering accuracy, and scalable power management for office complexes, data centers, and light industrial plants.
The unit is UL Listed, ensuring electrical safety compliance for commercial installations. It also comes with Eaton's warranty policy, offering protection for up to one year from installation or eighteen months from shipment, whichever occurs first. This reduces ownership risk and supports maintenance planning.
Yes, the catalog notes indicate that for outdoor top-exit installations, Myer-type hubs should be mounted on a rainproof cap. This approach helps protect terminations from weather while preserving accessibility for servicing, making it suitable for exposed installations in commercial or light industrial sites.
By consolidating a 400A main with a 1200A bus in a single meter stack, the solution reduces panel footprint, speeds commissioning, and lowers wiring complexity. The UL Listed certification and straightforward maintenance contribute to lower risk, faster depreciation cycles, and a shorter path to ROI for facility owners and EPCs.