Eaton 3MM220R12C Residential Meter Stack - UL Listed
Part Number: 3MM220R12C
Quick Summary
Eaton 3MM residential meter stack delivers multi-metering for subpanel installations in residential and light commercial settings. The unit helps building owners monitor energy usage across tenants or circuits without adding separate meters on each branch. UL Listed safety certification ensures code compliance and safer field installation. Outdoor-rated with a 200A service and a 1200A bus, it supports 3-phase in, single-phase out configurations and 120/208Vac operation, streamlining procurement and installation. Designed for durability and quick wiring, this metering stack reduces device count, lowers labor costs, and improves energy management strategies.
Product Information
Extended Description
3MM220R12C Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Cu, Bus:1200A, No by, Outdoor, Depends on selected MCB, 5-jaw, Sockets:2, 3-ph in, single-ph 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
3MM220R12C
UPC
786685512976
Product Length/Depth
13.5 in
Product Height
52.35 in
Product Width
7.01 in
Product Weight
68 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 - 3MM220R12C
Feature: Multiple metering capability with 200A service and 1200A bus allows simultaneous monitoring of several circuits in a single enclosure. Business Impact: Enables accurate tenant or circuit-level energy accounting, accelerating invoicing and utility reconciliation. Application: Ideal for multi-tenant residential buildings and small-to-mid-size commercial projects seeking centralized metering. Long-tail keywords: multi-meter residential metering, 200A service equipment, energy management in multifamily installations, meter stack installation, 1200A bus rating. Feature: Outdoor-rated enclosure supports external installations, reducing indoor footprint and simplifying site wiring. Business Impact: Improves installation flexibility and safety in exposed environments, cutting interior remodeling costs. Application: Outdoor meter stacks for campuses, remote facilities, and external utility rooms. Long-tail keywords: outdoor metering enclosure, weather-resistant meter stack, outdoor electrical equipment. Feature: 3-phase in, single-phase out configuration aligns with common distribution schemes and minimizes converter needs. Business Impact: Simplifies cabling, reduces material costs, and accelerates commissioning. Application: Subfeed metering for mixed-phase systems in residential/commercial panels. Long-tail keywords: 3-phase in single-phase out metering, meter stack wiring, phase configurations. Feature: UL Listed certification confirms safety and regulatory compliance for electrical installations. Business Impact: Lowers risk of non-compliance and potential fines, supports quality assurance programs. Application: Required for residential metering equipment in many codes. Long-tail keywords: UL Listed metering equipment, electrical compliance, safety certification. Feature: Compact dimensions and service orientation (13.5 in depth, 7.01 in width, 52.35 in height, 68 lb) enable precise planning and easier handling. Business Impact: Reduces shipping considerations and installation time, improving project timelines. Application: New buildouts and retrofit projects with space constraints. Long-tail keywords: meter stack dimensions, installation planning, device weight for field mounting. Warranty: Eaton 25-000 policy provides one-year from installation or 18 months from shipment, whichever comes first. Application: Reliable post-sale support and documented coverage for field service and commissioning.
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FAQs
The 3MM220R12C is designed for outdoor installation with a 200A service and a 1200A bus. Begin by mounting the unit on a suitable outdoor-rated enclosure, connect the two metering sockets, and wire per the 3-phase in, single-phase out configuration. Use appropriate MCBs as dictated by the selected protection scheme, and verify 120/208Vac operation. Ensure all connections comply with UL-listed guidelines and local codes.
This meter stack carries UL Listed certification, indicating compliance with recognized safety standards for electrical equipment. UL Listing supports regulatory acceptance, insurance requirements, and safer field installations. Cross-check with local electrical codes to confirm any jurisdiction-specific requirements, and ensure the installation complies with the Eaton warranty and service policies.
Yes, the 3MM220R12C is specified for outdoor use. Plan for weather protection, proper enclosure mounting, and secure, service-rated wiring. Use the 3-phase in, single-phase out arrangement with sockets and 5-jaw connectors as per the installation manual. Verify strain relief, conductor sizing, and voltage rating of 120/208Vac, while adhering to UL-listed installation practices.
The unit supports multiple metering with a 200A service and a 1200A bus, enabling simultaneous monitoring of various circuits or tenants. Its 3-ph in, single-ph out configuration suits common distribution schemes. This setup facilitates accurate energy accounting, tenant billing, and enhanced energy management across residential or light commercial installations.
Eaton provides a warranty under policy 25-000: one year from the date of installation or eighteen months from shipment, whichever occurs first. This coverage supports replacement or repair for manufacturing defects. For ongoing reliability, rely on Eaton technical support and refer to the specifications sheet for installation and maintenance guidance.