Eaton 3MM312C2BC Residential Meter Stack - UL Listed
Part Number: 3MM312C2BC
Quick Summary
Eaton 3MM residential meter stack enables compact multi-meter installations in indoor service panels. Engineers often struggle with space, labeling, and wiring when expanding metering; this design simplifies integration and reduces field complexity. Certifications include UL Listed for electrical safety, supporting code-compliant installation in commercial and residential environments. This solution also aligns with energy management goals by delivering scalable metering and a clear path to accurate load monitoring for improved ROI.
Product Information
Extended Description
3MM312C2BC Eaton: Eaton 3MM residential meter stack, Multiple metering, 125A, Copper, Bus:800A, No bypass, Indoor, Depends on selected MCB, Five-jaw, Socket:3, Three-phase in, single-phase out, B-C, BR2_, BRH2_, BRHH2_, BRX2, Ring, Socket:125A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM312C2BC
UPC
782114631911
Product Length/Depth
12.26 in
Product Height
41.8 in
Product Width
7.01 in
Product Weight
57 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
Type
Multiple metering
Feature → Business Impact → Application: The unit supports multiple metering, enabling scalable monitoring for multi-tenant buildings and future growth, reducing potential rework and accelerating project timelines in both new construction and retrofit scenarios. This translates to improved space utilization and simplified wiring in compact indoor panels, ideal for residential complexes and light commercial installations. Application: Multi-meter configurations in indoor service panels with 125A service rating and copper bus, providing robust current carrying capacity for reliable metering and protection coordination.Feature → Business Impact → Application: Copper bus with 800A main bus and five-jaw/socket arrangement delivers strong electrical integrity and ease of maintenance, lowering risk of terminal wear and misconnection. Application: High-reliability metering in dense service rooms where durable connections are critical for safety and ongoing uptime in utilities and property management projects.Feature → Business Impact → Application: No bypass option streamlines protection coordination and reduces leakage paths, contributing to safer energy distribution and simpler troubleshooting. Application: Indoor installations where clear metering boundaries and straightforward fault isolation matter for commissioning and ongoing diagnostics.Feature → Business Impact → Application: UL Listed certification reinforces compliance with safety standards, while compact dimensions (12.26 in L x 7.01 in W x 41.8 in H) and 57 lb weight support easier handling and installation in constrained spaces. Application: Retrofit or new builds in residential and light commercial environments requiring code-compliant, space-efficient metering solutions.Feature → Business Impact → Application: 120/208 VAC operation and three-phase in, single-phase out capability enable versatile integration with common electrical systems, reducing the need for additional adapters. Application: Multi-meter configurations in mixed-phase environments for accurate load distribution and streamlined energy management workflows.
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FAQs
The 3MM312C2BC is designed for indoor residential service panels and supports multiple metering with a 125A rating and copper bus. Its socket configuration and five-jaw design simplify mounting, wiring, and labeling, enabling quicker retrofits or new installations in multi-tenant or compact residential environments while maintaining code-compliant safety.
Plan for an indoor enclosure with space for the 12.26 inch depth, 41.8 inch height, and 7.01 inch width. Ensure proper clearance for the copper bus connections, socket arrangement, and three-phase in / single-phase out wiring. Verify UL Listed compliance and accommodate the 57 lb weight during handling and mounting in service panels.
The product carries UL Listed certification, indicating compliance with recognized electrical safety standards for metering equipment. This certification supports code compliance, safer operation in indoor environments, and confidence in installation quality for both new builds and retrofit projects.
The unit provides multiple metering with three-phase in and single-phase out, enabling accurate monitoring of complex loads in buildings with mixed-phase systems. It uses a copper bus and a robust 125A service rating to support reliable current paths, enhancing energy usage visibility and supporting optimization efforts in facility management.
Eaton’s standard warranty policy applies to this product, with coverage details typically outlined in policy 25-000. The warranty supports installation-based protection against manufacturing defects for a specified period from installation or shipment, whichever comes first, offering peace of mind in commissioning and ongoing operations.