Eaton 35MM240R1240C34 Commercial Meter Stack - UL Listed
Part Number: 35MM240R1240C34
Quick Summary
The Eaton 35MM240R1240C34 commercial meter stack provides plug-in metering for commercial facilities, simplifying energy measurement in service entrances. Design challenges like tight spaces and exit constraints—top, bottom, or back—can complicate installation; this unit offers flexible feeder exits and modular breakers to streamline layouts. It is UL Listed and features a NEMA 3R enclosure for outdoor reliability, while the 400A rating supports scalable loads. Coupled with 120/240 VAC compatibility, the stack reduces BOM complexity and accelerates procurement, delivering faster project turnaround and predictable maintenance across building portfolios.
Product Information
Extended Description
35MM240R1240C34 Eaton: Eaton 35MM commercial meter stack, Plug-in socket, 400A, Cu, Bus:1200A, Lever, NEMA 3R, Depends on selected MCb, Five-jaw, Sockets:2, 3-phase in, 1-phase out, A-B, (1) 300A and (1) 400A breakers installed, Ringless, Socket:400A, 120/240 Vac
Product Name
Eaton 35MM commercial meter stack
Catalog Number
35MM240R1240C34
UPC
786689165963
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
Number of jaws
Five-jaw
Number of sockets
2
Phase
Three-phase in, single-phase out
Amperage Rating
400A
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 35MM240R1240C34
Plug-in socket design enables faster field installation and easier breaker swapping, reducing commissioning time in commercial meter stacks. The five-jaw sockets and two outlet sockets deliver a robust, low-resistance connection capable of handling 400A service with repeatable metering accuracy. In practice, this means fewer field rewires, shorter outages during upgrades, and better consistency across multi-panel configurations. Three-phase in, single-phase out configuration simplifies monitoring of mixed electrical systems common in office parks, retail centers, and light industrial facilities. The arrangement supports straightforward CT/VT placement and accurate energy measurement without chasing incompatible components. Technicians appreciate the clear wiring paths and standardized connections that minimize troubleshooting time. NEMA 3R enclosure rating combined with UL Listed certification provides outdoor readiness and safety compliance in weather-exposed installations such as rooftops, loading docks, and exterior meter rooms. The rugged construction resists rain, dust, and corrosion while meeting utility and national codes. This reliability reduces downtime and improves long-term total cost of ownership. Exit options top, bottom, or back reduce conduit sequencing and simplify integration with existing feeders and utility meters. A copper bus design supports high-current performance with low resistance, improving voltage drop characteristics and energy accuracy. These features translate to smoother commissioning and fewer spare parts in service fleets. The generous dimensions and weight, 66.625 in long, 19.375 in wide, 8.75 in tall, and roughly 320 lb, reflect a compact yet sturdy platform suitable for centralized metering in shared equipment rooms. Mounting versatility and compatibility with common 120/240 VAC networks help businesses standardize procurement and streamline installation across sites. The result is better project predictability, fewer supplier touchpoints, and improved ROI.
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FAQs
Installation begins with selecting the appropriate exit orientation (top, bottom, or back) for your service entrance and routing feeders accordingly. The plug-in socket, five-jaw design supports a robust 400A connection, simplifying breaker seating and reducing field wiring errors. Ensure alignment with the 120/240 VAC network and verify that the two sockets are correctly fed by the main feeder. For retrofit projects, plan for minimal panel downtime by leveraging the unit’s modular breakers and quick-connect features, then perform final torque checks and insulation verification to guarantee long-term reliability.
Yes. The Eaton 35MM240R1240C34 is specified for three-phase in, single-phase out metering, aligning with typical commercial building configurations that combine three-phase power with single-phase services. This setup facilitates accurate energy measurement across various loads, simplifies CT/VT placement, and reduces the need for multiple metering modules. When planning, ensure compatible MCBs and breakers are used to maintain system balance and metering accuracy across all phases.
Absolutely. The unit is UL Listed and enclosed in a NEMA 3R rated housing, designed for outdoor environments such as rooftops, loading docks, and exterior meter rooms. This protection mitigates weather-related risks like rain and dust ingress, supporting continuous operation with reduced maintenance. For outdoor use, confirm grounding and bonding per local codes and use rainproof hubs if exiting via the top, as recommended in installation notes.
The meter stack occupies 66.625 inches in length, 19.375 inches in width, and 8.75 inches in height, with an estimated weight of 320 pounds. This profile fits standard service entrances and equipment rooms while still offering ample clearance for wiring and maintenance access. When planning space, account for service clearance, ease of breaker access, and potential future expansions that may require slightly larger footprints or additional cabling routes.
The plug-in socket design and five-jaw configuration reduce installation time and field rework, delivering faster commissioning and lower labor costs. High-current 400A capability minimizes the need for additional enclosures and feeders, while the NEMA 3R UL Listed build enhances outdoor reliability, reducing downtime and warranty claims. Over the product life, these factors translate into lower total cost of ownership, improved system uptime, and faster project ROI for commercial deployments.