Eaton 37MM240R1240C29 Commercial Meter Stack - UL Listed
Part Number: 37MM240R1240C29
Quick Summary
Eaton commercial meter stack is a 3-phase metering solution for commercial service entrances. Facilities teams often wrestle with space constraints, phase balance, and downtime during maintenance or reconfiguration. This unit carries UL Listed certification, supports factory A-B phase balance, and ships with a lever bypass for rapid service isolation. By combining a rugged copper bus with modular 2-socket readiness and a compact footprint, it enables faster commissioning, improved reliability, and lower lifecycle costs. Its 37MM frame compatibility, 66.625 in length, and 400A rating meet the needs of mid‑scale commercial power distribution, while Eaton’s support network simplifies procurement and field service.
Product Information
Extended Description
37MM240R1240C29 Eaton: Eaton commercial meter stack, 37MM-3-Phase, 400A, Copper Bus, K-frame (1) 250A and (1) 200A breaker installed, 400A socket, 208Y/120V, Ringless, Al 1200A bus, Lever bypass, Seven-jaws, 2 sockets, Factory A-B phase balance
Product Name
Eaton commercial meter stack
Catalog Number
37MM240R1240C29
UPC
786689064198
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 - 37MM240R1240C29
Feature → Business Impact → Application: 3-phase 400A capacity with 208Y/120V service enables high-demand commercial loads with reduced feeder losses and improved voltage regulation. This translates to more reliable service for retail, office, and light industrial facilities, while providing room for future load growth. Application: new builds and retrofit metering in mid-scale commercial campuses. Feature → Business Impact → Application: Two sockets configured with one 250A and one 200A breaker installed deliver immediate multi-circuit capabilities, cutting on-site wiring time and minimizing field assembly errors. Application: quick-install meters for multi-tenant buildings and small distribution rooms. Feature → Business Impact → Application: Copper bus with Al 1200A bus layers delivers robust current distribution and resistance to thermal cycling, enhancing longevity and reducing maintenance windows. Application: high-cycle commercial environments where uptime is critical, such as data centers or healthcare facilities. Feature → Business Impact → Application: Ringless cover design simplifies wiring access and reduces installation time, while maintaining enclosure integrity. Application: retrofit projects and space-constrained installations where service interruptions must be minimized. Feature → Business Impact → Application: Lever bypass and seven-jaws configuration allow safe, rapid isolation during maintenance and testing, lowering downtime and improving safety procedures. Application: emergency power testing, routine service windows, and commissioning phases. Feature → Business Impact → Application: Factory A-B phase balance supports reduced neutral current and optimized load distribution, improving overall energy efficiency and equipment longevity. Application: commercial systems with uneven phase loading or critical equipment requiring balanced feeders. Feature → Business Impact → Application: Large footprint with defined dimensions (66.625 in L, 19.375 in W, 8.75 in H) aligns with standard enclosures and mount patterns, reducing site adaptation costs. Application: new build rack layouts and retrofits in existing electrical rooms. Feature → Business Impact → Application: UL Listed certification provides safety and compliance confidence for code-approved installations, minimizing inspection delays and accelerating procurement cycles. Application: regulated commercial projects and projects requiring formal safety documentation.
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FAQs
This meter stack is built for the Eaton 37MM frame and standard commercial metering enclosures. It measures 66.625 inches in length, 19.375 inches in width, and 8.75 inches in height, and ships configured with two sockets (one 250A, one 200A). Ensure enclosure clearance and feeder routing align with these dimensions before install.
The unit is a 3-phase, 208Y/120V system rated at 400A. It includes two sockets with built-in breakers (one 250A and one 200A) and supports a seven-jaw configuration. The device uses a copper bus with an aluminum section rated for high current, suitable for mid‑to‑large commercial service entrances.
Best suited for mid-scale commercial buildings, multi-tenant facilities, and light industrial applications requiring reliable 3-phase metering and quick maintenance access. Its lever bypass, ringless cover, and phase-balancing capability help minimize downtime during commissioning and routine service, while supporting scalable electrical room layouts.
Yes, the product is UL Listed, indicating compliance with recognized safety standards for electrical distribution equipment. This designation helps meet code requirements, facilitates inspection acceptance, and reduces procurement risk for regulated commercial projects requiring certified metering components.
The lever bypass enables rapid isolation during maintenance, minimizing outage duration. Factory A-B phase balance improves load distribution and reduces neutral loading, potentially lowering energy waste. Ringless access and robust copper/aluminum bus design contribute to longer service intervals and lower lifecycle costs in demanding commercial power environments.