Eaton 37MM240R1240C33 Meter Stack - UL Listed
Part Number: 37MM240R1240C33
Quick Summary
Eaton 37MM240R1240C33 Meter Stack is a plug-in socket assembly for 3-phase metering and distribution in commercial installations. Facilities engineers often wrestle with space constraints, top or bottom feed options, and accurate phase balancing when upgrading meter stacks. UL Listed construction supports safe installation and reliable performance in commercial environments. This solution leverages copper bus, a 400A socket, and lever bypass to simplify field wiring and maintenance while reducing downtime. It also supports 208Y/120V networks with factory A-B phase balance, delivering predictable metering results and scalable expansion for growing facilities.
Product Information
Extended Description
37MM240R1240C33 Eaton: Eaton commercial meter stack, 37MM-3-Phase, 400A, Copper Bus, K-frame (2) 300A breakers 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
37MM240R1240C33
UPC
786689213206
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 - 37MM240R1240C33
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Plug-in socket design with copper bus reduces wiring complexity and accelerates commissioning. Business Impact: Shorter installation timelines lower labor costs and minimize on-site risk. Application: Ideal for new commercial metering installations and retrofit projects where fast turnaround is critical. Feature: Pre-installed K-frame with two 300A breakers and a 400A socket. Business Impact: Improves reliability and reduces field assembly time, delivering predictable protection and streamlined testing. Application: High-load commercial applications such as multi-tenant offices or retail complexes where robust fault isolation matters. Feature: Copper bus with aluminum 1200A bus construction. Business Impact: Enhances current carrying capacity and durability, supporting longer service life with less maintenance. Application: Mid-to-large commercial feeders demanding stable, low-resistance connections. Feature: 208Y/120V metering with factory A-B phase balance. Business Impact: Delivers accurate, balanced metering data and simplifies energy management reporting. Application: Data centers, healthcare facilities, and educational campuses seeking precise power quality metrics. Feature: Flexible feeder exit options top, bottom, or back, plus rainproof-capable outdoor mounting. Business Impact: Provides installation versatility and weather-ready configurations, reducing site constraints. Application: Outdoor backend metering enclosures and rooftop installations with rainproof caps when exiting the top. Feature: Ringless design, lever bypass, seven-jaws, and two sockets. Business Impact: Enhances maintainability and serviceability, enabling quick bypass operations and safer servicing. Application: Routine maintenance in busy facilities where downtime must be minimized.
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FAQs
The 37MM240R1240C33 is a plug-in socket meter stack designed for 3-phase metering in commercial environments. It supports 208Y/120V networks and includes factory A-B phase balance, making it compatible with Eaton metering catalog offerings. Its pre-wired features and lever bypass simplify integration with existing bus systems and distribution arrangements, reducing retrofit risk.
Key specs include a 400A socket, copper bus with a 1200A aluminum bus option, and a K-frame with two 300A breakers installed. The unit weighs 320 lb and measures 66.625 inches in depth, 8.75 inches in height, and 19.375 inches in width. It operates on 208Y/120V and is UL Listed for safety and compliance.
Yes, the catalog notes indicate outdoor suitability with proper rainproof cap considerations. If exiting the top in outdoor applications, install Myer type hubs on the rainproof cap. This enables weather-resistant installation while maintaining service continuity in exposed locations.
Main tenant feeders can exit the unit top, bottom, or back, allowing flexible site layouts. The meter stack includes factory A-B phase balance to ensure accurate metering across phases, which supports reliable energy management and billing in multi-tenant or campus deployments.
Access Eaton's documentation package, including the Specification Sheet for model 37MM240R1240C33, the Residential and Light Commercial Metering Products catalog, and Selling Policy 25-000. These resources provide installation instructions, wiring diagrams, and policy guidance to support compliant deployments.