Eaton 37MM240R1240C55 Meter Stack - UL Listed
Part Number: 37MM240R1240C55
Quick Summary
Eaton 37MM240R1240C55 Meter Stack enables compact, 3‑phase metering for commercial facilities. For engineers facing space constraints and wiring complexity, this plug‑in stack simplifies installation and future scalability. UL Listed safety certification underpins reliable, code‑compliant operation, and the unit supports 120/240V single‑phase and 208Y/120V metering with a copper bus and ringless design. Designed for serviceability and fast commissioning, it pairs with Eaton metering hardware to reduce field labor and ensure accurate phase balance, delivering measurable energy management benefits for building owners and operators.
Product Information
Extended Description
37MM240R1240C55 Eaton: Eaton commercial meter stack, 37MM-3-Phase, 400A, Copper Bus, K-frame (2) 350A 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
37MM240R1240C55
UPC
786689213299
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 - 37MM240R1240C55
Feature → Business Impact → Application: Plug-in socket design simplifies replacement and reduces commissioning time, delivering faster project turnover and lower field labor costs in commercial panels where space is at a premium. This directly supports efficiency gains during retrofit projects and new installations in offices, retail, and light industrial facilities. Feature → Business Impact → Application: A 400A socket with (2) 350A breakers installed supports scalable service to meet evolving load profiles, enabling smoother upgrading paths without reconfiguring the entire distribution scheme. Ideal for 3‑phase power distribution in data centers, campuses, and multi-tenant buildings where reliability and expandability matter. Feature → Business Impact → Application: Copper bus and 1200A class bus architecture offer low impedance paths and robust fault tolerance, reducing voltage drop and improving metering accuracy under dynamic loading conditions common in modern facilities. Application includes critical power environments, where precise energy measurement supports demand response programs and utility incentives. Feature → Business Impact → Application: Ringless construction and lever bypass enhance mechanical reliability and serviceability, minimizing nuisance maintenance and facilitating quick isolation for testing or replacement in busy switchgear rooms. Feature → Business Impact → Application: Compatibility with 208Y/120V network metering and 120/240V single‑phase networks provides versatility for mixed loads across commercial buildings, healthcare facilities, and retail centers, simplifying procurement and stock planning. Feature → Business Impact → Application: Mounting flexibility with top, bottom, or back exit paths, plus outdoor rainproof options, enables seamless integration into new buildouts and retrofit projects, reducing site headaches and installation time. Feature → Business Impact → Application: A‑B phase balance and seven‑jaw capability streamline wiring discipline and phase alignment, supporting accurate billing and simpler commissioning in multi‑meter installations across campuses and industrial parks. The result is improved energy visibility, quicker fault isolation, and lower operating costs over the asset lifecycle.
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FAQs
This meter stack uses a plug‑in socket design and supports top, bottom, or back exit configurations. For outdoor applications with top exits, install Myer type hubs on a rainproof cap. Ensure 208Y/120V or 120/240V wiring complies with local codes, and maintain proper phase balance with the factory A‑B configuration. Confirm panel bus rating and available space before mounting to minimize migration work and maximize serviceability.
Key ratings include 400A socket, included (2) 350A breakers, copper/aluminum 1200A bus, and 208Y/120V network metering with 120/240V single‑phase compatibility. Physical footprint is 66.625 inches long, 19.375 inches wide, and 8.75 inches high, with an approximate weight of 320 lb. These specs support precise planning for space, load, and mounting within commercial distribution layouts.
Yes, the unit supports outdoor use with top exit configurations when equipped with rainproof hubs. The catalog notes emphasize flexible termination paths and environment‑ready design, while UL Listed certification supports safety compliance in outdoor and indoor metering installations. Always follow enclosure and weatherproofing guidelines per site requirements.
The product carries UL Listed certification, which validates safety compliance for commercial metering equipment. While other standards are common in industry, this model’s UL listing is the primary certification highlighted for ensuring safe installation and operation within building electrical systems.
Expect reduced field labor during installation due to the plug‑in socket design and flexible exit options. The copper/aluminum bus design and ringless architecture improve reliability and metering accuracy, contributing to lower maintenance costs and better energy visibility for demand management programs. Regular inspection of breakers, bus connections, and enclosure integrity will sustain performance over time.