Eaton 37MM120R12C Commercial Meter Stack - UL Listed
Part Number: 37MM120R12C
Quick Summary
Eaton 37MM120R12C commercial meter stack is a three-phase metering solution for commercial power distribution. Facility managers and electricians often struggle with space constraints and inconsistent metering accuracy in busy multi-tenant buildings. UL Listed certification ensures safety and reliability, while MEG and Xcel Energy approvals support utility compliance across multiple states. This meter stack combines scalable three‑phase metering with compact dimensions to streamline installations and improve energy accountability in offices, retail centers, and data‑driven facilities. By aligning with standard electrical rooms and offering a lever bypass and secure ringless design, it speeds commissioning and reduces lifecycle costs.
Product Information
Extended Description
37MM120R12C Eaton: Eaton 37MM Three-Phase Commercial Meter Stack Modules, 225A, Copper Bus 1200 Ampere, Lever bypass, Seven-jaws, 1 Socket, Three-phase in, three-phase out, Factory A-B Phase Balance, Ringless Security , 225 Ampere Socket Ampere, 208Y/120V
Product Name
Eaton commercial meter stack
Catalog Number
37MM120R12C
UPC
786685480992
Product Length/Depth
8.75 in
Product Height
25.38 in
Product Width
18.25 in
Product Weight
98 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
Utility approvals
IL : Ameren MO : Ameren FL : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) IN : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) KY : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) NC : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) OH : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) SC : MEG (Duke Energy, Florida Power, Tampa Electric, Gulf Power, Oklahoma Gas and Electric) CO : Xcel Energy MI : Xcel Energy MN : Xcel Energy ND : Xcel Energy NM : Xcel Energy SD : Xcel Energy TX : Xcel Energy WI : Xcel Energy
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 37MM120R12C
Feature → Business Impact → Application: The 37MM120R12C uses a three-phase, three-in, three-out design with a copper bus rated up to 1200 A and a 225 A socket, enabling scalable power distribution for mid-sized commercial environments. This translates to improved load management and reduced inventory of separate meters, which cuts installation time and labor costs in multi-tenant retail complexes and office campuses. Application: retrofit projects and new builds where space and phasing alignment are critical. Feature → Business Impact → Application: Lever bypass, seven-jaws, and one socket configuration allow quick isolation and flexible metering setup, minimizing downtime during maintenance and enabling faster commissioning for new circuits. Application: data centers, hospitals, and large office towers where uptime is paramount. Feature → Business Impact → Application: Factory A-B Phase Balance enhances voltage balance across phases, improving measurement accuracy and reducing energy waste due to imbalance. Application: facilities with uneven load distribution such as mixed-use developments and modular campuses. Feature → Business Impact → Application: Ringless security and UL Listed certification streamline safety compliance and reduce installation risk in secure environments. Application: retail banks, government offices, and high-security facilities. Feature → Business Impact → Application: Compact footprint and clear labeling, with dimensions of 8.75 in depth, 25.38 in height, 18.25 in width and a weight of 98 lb, simplify planning in standard electrical rooms and retrofit sites. Application: existing buildings with limited space. Feature → Business Impact → Application: Utility approvals from MEG and Xcel Energy support project approvals and regulatory compliance across multiple states, accelerating procurement and utility interconnection. Application: large-scale commercial developments and energy retrofit projects. Feature → Business Impact → Application: Comprehensive warranty and service options provide long-term reliability and predictable total cost of ownership. Application: ongoing operations in retail, healthcare, and education facilities.
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FAQs
Yes. The 37MM120R12C is a three-phase in/out meter stack designed for typical commercial electrical rooms, featuring a 225 A socket and copper bus up to 1200 A, with lever bypass and seven-jaw configuration for flexible, standards-aligned installations. It suits office complexes, retail centers, and multi-tenant buildings that require scalable metering without custom panel work.
The unit is UL Listed, ensuring safety and reliability for commercial metering. It also carries utility approvals through MEG and Xcel Energy in multiple states, supporting regulatory compliance and smoother interconnection for projects across various regions.
Consider the meter stack’s dimensions (8.75 in deep, 25.38 in high, 18.25 in wide) and its 98 lb weight when planning clearance and mounting. Leverage the lever bypass and seven-jaw sockets for quick servicing, and ensure alignment with three-phase in/out routing to optimize load balance and reduce commissioning time.
Factory A-B Phase Balance improves phase loading balance, enhancing measurement accuracy and reducing energy waste due to imbalanced phases. The copper bus and robust enclosure design support stable voltage and current paths, making it suitable for data centers, healthcare facilities, and large offices with diverse load profiles.
The product is covered by Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever comes first. This aligns with typical commercial metering expectations and offers predictable coverage for commissioning risk and ongoing maintenance.