Eaton 3MM520R12C Residential Meter Stack - UL Listed
Part Number: 3MM520R12C
Quick Summary
Eaton 3MM520R12C residential meter stack is a multi-meter enclosure designed for outdoor residential metering applications. Engineers often face constraints from tight spaces, complex wiring, and the need to consolidate meters without compromising safety. UL Listed certification underpins safety and reliability for outdoor installations, while its 200A service with a 1200A bus and 120/208VAC operation supports scalable metering in dense dwellings or light commercial projects. This solution also simplifies maintenance and labeling, reducing field errors. By pairing robust enclosure design with flexible MCB compatibility, it delivers faster installations, clearer conductor management, and long-term cost savings for utilities and building owners. Secondary benefits include improved energy visibility and asset compliance across projects.
Product Information
Extended Description
3MM520R12C Eaton: Eaton 3MM residential meter stack, Multiple meter, 200A, Cu, Bus:1200A, No bypass, Outdoor, Depends on selected MCB, 5-jaw, Sockets:5, 3-phase in, 1-phase out, A-B, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ring, Socket:200A, 120/208VAC
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM520R12C
UPC
786685513300
Product Length/Depth
13.5 in
Product Height
74.96 in
Product Width
6.87 in
Product Weight
106 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
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM520R12C
Feature: Multiple metering capability with 3-phase in and 1-phase out and five sockets, plus a 1200A bus. Business Impact: Consolidates meters in a single enclosure, reducing wiring runs and space requirements. Application: Ideal for multi-tenant residences and outdoor metering points where expandability and organized conductor management matter. Feature: Outdoor enclosure designed for weather exposure and outdoor installation. Business Impact: Enhances reliability in harsh environments while minimizing enclosure footprint. Application: Suitable for exterior meter banks serving residential or light commercial buildings. Feature: Compatibility with various MCB configurations (depends on selected MCB). Business Impact: Optimizes protection coordination and simplifies field upgrades without reengineering the cabinet. Application: Supports customized safety schemes for evolving load profiles. Feature: UL Listed safety certification. Business Impact: Provides risk mitigation and regulatory confidence for installers and owners. Application: Critical for compliance in metering installations across regions. Feature: 200A service with a 1200A bus and 120/208VAC operation. Business Impact: Enables scalable metering and supports standard North American voltages. Application: Ideal for outdoor multi-metering in apartments, campuses, and small commercial facilities. Warranty: Eaton Selling Policy 25-000 offers protection for one year from installation or eighteen months from shipment, whichever occurs first. Business Impact: Reduces ownership risk and total cost of ownership through defined coverage. Application: Useful for procurement planning and service budgeting across projects.
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FAQs
For outdoor installations, mount on a suitable rack or wall, ensure proper weatherproofing, and provide clean routing for five sockets and conductors. The unit supports 3-phase in / 1-phase out configurations and depends on the selected MCB, so verify compatibility with the intended protection scheme and circuit breakers before wiring. Proper labeling and enclosure clearance are essential for safe operation.
Yes. The 3MM520R12C is designed for 3-phase in and 1-phase out metering with five sockets and a 1200A bus. This configuration simplifies multi-tenant or feeder metering in outdoor environments while delivering 120/208VAC operation suitable for typical residential and light commercial loads.
Key specs include 200A service, a 1200A bus, five metering sockets, outdoor-rated enclosure, and 120/208VAC operation. It is intended for multiple metering with no bypass, and the catalog notes its use with various MCBs to tailor protection levels for specific installations.
The 3MM520R12C is UL Listed, confirming it meets recognized electrical safety standards for metering enclosures. This certification helps ensure safe outdoor operation, reduces risk during installation, and supports compliance with regulatory requirements in many jurisdictions where UL certification is a prerequisite for electrical equipment.
The warranty follows Eaton Selling Policy 25-000, providing one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This coverage helps protect against manufacturing defects and supports project budgets by clarifying the service timeline and replacement responsibilities.