Eaton 37MM140R1240K Meter Stack - UL Listed
Part Number: 37MM140R1240K
Quick Summary
Eaton commercial meter stack delivers compact, three-phase metering for demanding commercial installations. Many projects struggle to integrate robust metering that fits limited space while meeting safety and utility requirements. This unit carries UL Listed certification and is built for durable service with a 1200 A bus rating, 400 A per-branch capability, and a seven-jaw lever-bypass design. With a factory-balanced A-B phase arrangement and a single metering socket, it streamlines installation and reduces field wiring complexity. Designed for high-availability facilities, it supports efficient space planning and dependable energy measurement across commercial buildings, aligning with power management and distribution needs for modern industrial environments.
Product Information
Extended Description
37MM140R1240K Eaton: Eaton's 37MM Three-Phase Commercial Meter Stack Modules, 400A, Copper Bus 1200 Ampere, Lever bypass Seven-jaws, 1 Socket, Three-phase in, three-phase out Factory A-B Phase Balance, Ringless Security , 400 Ampere Socket Ampere208Y/120V
Product Name
Eaton commercial meter stack
Catalog Number
37MM140R1240K
UPC
782116303847
Product Length/Depth
8.75 in
Product Height
52.63 in
Product Width
18.25 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
Bus Rating
1200 A
Number of jaws
Seven-jaw
Amperage Rating
400A
Number of meter socket
1
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM140R1240K
Feature: Three-phase operation with a 1200 A bus rating and 400 A per-phase capacity enables this meter stack to support large commercial loads. Business impact: scalable energy metering across multiple feeders reduces the need for mid-project upgrades. Application: retail complexes, office campuses, and light industrial facilities that require reliable, multi-branch metering. Feature: Seven-jaw lever bypass and a single meter socket allow rapid isolation and fast service restoration. Business impact: minimizes downtime during maintenance and utility outages. Application: data centers and manufacturing plants where uptime is critical. Feature: Compact footprint with dimensions 8.75 in depth, 18.25 in width, and 52.63 in height, plus 145 lb weight. Business impact: simplifies installation in space-constrained panels and reduces enclosure footprint. Application: retrofit projects and new builds with space constraints. Feature: Ringless security and phase balance capability improve safety and load balancing. Business impact: reduces tampering risk and improves voltage balance across feeders. Application: large facilities with diverse electrical loads. Feature: One meter socket and 208Y/120V output compatibility improve wiring efficiency and compatibility with standard building electrical systems. Business impact: lowers cabling complexity and speeds commissioning. Application: commercial offices, retail centers, and hospitality venues.
Get a Quick Quote for a Eaton 37MM140R1240K
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton 37MM140R1240K?
Enquire Now
FAQs
Plan for a clear mounting footprint and secure support for a 145 lb unit. Ensure enclosure space near the main distribution panel accommodates 52.63 in height and 18.25 in width, with proper access for a single meter socket. Verify 208Y/120V outputs and wiring routes comply with local electrical codes and manufacturer guidance.
The unit provides 400 A per phase with a total bus rating of 1200 A. It features seven jaws and a single meter socket to manage three-phase in/out. The output is 208Y/120V, suitable for common commercial building loads, while maintaining high fault tolerance and streamlined wiring within code-compliant installations.
Yes. The 37MM140R1240K includes factory A-B phase balance capabilities, allowing balanced distribution across three phases. This reduces peak loading on individual feeders, improves voltage regulation, and supports more stable operation for mixed load profiles such as offices, retail, and light manufacturing environments.
The Eaton meter stack is UL Listed, confirming conformance to recognized safety standards for electrical distribution equipment used in commercial environments. This certification supports compliance with regulatory requirements and provides assurance for field installation, servicing, and ongoing operation.
The seven-jaw design and lever bypass enable rapid isolation of circuits, reducing downtime during maintenance or fault events. This translates to shorter outage windows, faster service restoration, and lower labor costs over the product lifecycle, with reliable metering continuing to support accurate energy data for billing and energy-management programs.