Eaton 37MM240R124039 Meter Stack - UL Listed
Part Number: 37MM240R124039
Quick Summary
The Eaton 37MM240R124039 commercial meter stack provides compact metering and main distribution for 3-phase commercial and light industrial feeders. Facilities teams face space constraints, wiring complexity, and downtime during upgrades; this unit consolidates metering, breakers, and bus in a single, accessible assembly. UL Listed safety certification supports code compliance and installation confidence, while the ringless cover and lever bypass simplify service disconnects when maintenance is required. With a 400 A rating and compatibility with 208Y/120V systems, this meter stack delivers reliable power distribution and streamlined installation, reducing field troubleshooting time. It supports scalable metering in commercial buildings, data centers, and multi-tenant facilities, aligning with cost control and project timelines through a compact, high-capacity solution.
Product Information
Extended Description
37MM240R124039 Eaton: Eaton commercial meter stack, 37MM-3-Phase Module, 400A, K-frame included secondary breaker, (1) 300A and (1) 200A breaker installed, 400A socket, 208Y/120V, Ringless, Al 1200A bus, Lever bypass, Seven-jaws, 2 sockets
Product Name
Eaton commercial meter stack
Catalog Number
37MM240R124039
UPC
786689061760
Product Length/Depth
66.625 in
Product Height
8.75 in
Product Width
19.375 in
Product Weight
320 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
Number of sockets
2
Amperage Rating
400A
Cover
Ringless
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM240R124039
Feature → Business Impact → Application: 400 A rating and 208Y/120V three‑phase compatibility enable high-load commercial feeders while maintaining voltages common to most facilities; impact is faster, safer commissioning with fewer panels. Application includes large offices, retail centers, and light-industrial spaces seeking efficient power management. Feature → Ringless cover with lever bypass reduces downtime during service or testing; business impact is quicker maintenance cycles and safer fault isolation; application spans emergency isolation in occupied facilities and upgrade projects. Feature → Two sockets installed (one 300 A and one 200 A) plus a 400 A socket create flexible distribution; impact is reduced equipment substitutions and simplified wiring layouts; application suits modular metering in multi-tenant buildings. Feature → Aluminum 1200 A bus and robust build provide durable, low-resistance current paths; impact is improved efficiency and reduced heat/failure risk; application includes continuous operation environments with frequent switching. Feature → Dimensions (66.625 in L x 19.375 in W x 8.75 in H) and 320 lb weight offer predictable space planning; impact is accurate room layouts and easier rack integration; application supports retrofit and new builds where footprint is critical. Feature → UL Listed certification ensures safety and regulatory alignment; impact is faster permit approvals and installer confidence; application ideal for commercial metering installations requiring recognized standards. Feature → Warranty of one year from installation or eighteen months from shipment reduces total cost of ownership and risk; impact is predictable support for projects with long procurement cycles; application beneficial for procurement teams evaluating long-term maintenance.
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FAQs
The 37MM240R124039 is designed for 208Y/120V three-phase commercial and light-industrial feeders and accepts a 400A service with two installed sockets (one 300A and one 200A) plus a 400A socket. Its dimensions and ringless cover support integration into standard electrical rooms and MLO or switchgear environments, making retrofit and new-build projects straightforward.
Key specs include a 400A amperage rating, 208Y/120V three-phase operation, two sockets installed (plus a 400A socket), and a ringless cover with lever bypass. The unit uses aluminum 1200A bus for durable high-current paths and weighs about 320 lb with overall dimensions of 66.625 in length, 8.75 in height, and 19.375 in width.
Yes. Its modular design consolidates metering and main distribution in a single assembly, which simplifies wiring, reduces panel footprint, and speeds installation. The 400A rating supports shared service feeders while the dual-socket configuration accommodates separate metering and main protection, ideal for multi-tenant or retail environments requiring scalable distribution.
The unit is UL Listed, indicating it meets recognized safety standards for electrical equipment and installation practices. UL Listing supports regulatory compliance, smoother permitting, and wider acceptance by electrical contractors, which can shorten project timelines and reduce risk during commissioning.
Maintenance benefits include simplified service with lever bypass and a ringless cover, enabling faster disconnections and safer inspections. ROI comes from reduced install time, fewer field adaptations due to its ready-for-service configuration, and improved reliability from a robust 1200A bus and durable aluminum construction over a long service life.