Eaton 3MM420RC Residential Meter Stack - UL Listed
Part Number: 3MM420RC
Quick Summary
Eaton residential meter stack provides integrated metering for multi-tenant buildings and outdoor feeders. Maintenance and expansion challenges in tight spaces and utility coordination can slow projects. UL Listed certification supports safety compliance, and the outdoor enclosure is designed for reliable field operation, with utility approvals from Tucson Electric Power, UniSource, and Dominion. This product delivers a turnkey solution for group metering, with robust compatibility and installation advantages, reducing project lead times. Engineers will appreciate standardized component interfaces that simplify site wiring and testing, while procurement teams benefit from a single, scalable meter stack that supports future expansion. Its outdoor rated enclosure reduces weather-related maintenance and protects critical metering data.
Product Information
Extended Description
3MM420RC Eaton: Eaton's Three-Phase Residential Meter Stack Module, Group Metering Type, 200A Copper Bus 800 Ampere, No bypass, Outdoor, Five-jaws, 4 Sockets, Three-phase in, single-phase out, Ring Security, 120/208V
Product Name
Eaton residential meter stack
Catalog Number
3MM420RC
UPC
782114990810
Product Length/Depth
62.5 in
Product Height
8 in
Product Width
16 in
Product Weight
102 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
Group Metering
Utility approvals
AZ : Tucson Electric Power/ UniSource AZ : Sulphur Springs Valley Electric Coop NC : Dominion VA : Dominion
Interrupt rating
Depends on selected main circuit breaker
Enclosure
Outdoor
Secondary circuit breaker
CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM
Bus Rating
800 A
Phase
Three-phase in, single-phase out
Voltage rating
120/208V
Amperage Rating
200A
Bus material
Copper
Bypass
None
Number of jaws
Five-jaw
Number of sockets
4
Phase balance
A-B
Security
Ring
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 3MM420RC
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Three-phase in, single-phase out design streamlines feeder metering and reduces wiring complexity. Impact: Improves load balancing and simplifies subfeed wiring, lowering installation time. Application: Ideal for multi-tenant residential complexes and outdoor utility setups requiring reliable per-unit billing. Feature: 200A rating with an 800A copper bus and five jaws, four sockets. Impact: Provides ample headroom for future expansion and high fault tolerance, minimizing upgrade costs. Application: Fits typical utility service profiles and enables scalable metering configurations in new builds. Feature: Outdoor enclosure with UL Listed safety. Impact: Enhances weather resistance and long-term reliability, reducing maintenance cycles. Application: Suitable for exterior meter stacks on building façades or external electrical rooms. Feature: No bypass design. Impact: Preserves metering integrity and deters tampering, ensuring accurate revenue-grade data. Application: Critical for commercial and multi-tenant billing environments. Feature: Group Metering type with security ring and five jaws. Impact: Strengthens physical security and simplifies ring protection for multiple service drops. Application: Common in multi-tenant housing and mixed-use developments. Feature: Compatibility with CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM secondary breakers. Impact: Enables easy retrofits and future upgrades without replacing the entire enclosure. Application: Streamlines procurement and field installations for Eaton-based metering systems.
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FAQs
Yes. The 3MM420RC is designed for outdoor group metering with a three-phase in, single-phase out configuration, 120/208V operation, and a copper 800A bus. It supports standard mounting in compatible outdoor enclosures and aligns with Eaton’s secondary breaker families (CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM) for straightforward integration and upgrades.
Core specs include a 200A amperage rating, 800A bus rating, copper bus material, five-jaw construction, four sockets, and a 120/208V voltage rating. The product supports three-phase in and single-phase out, with no bypass, and is UL Listed to meet safety standards for outdoor metering installations.
The 3MM420RC is ideal for multi-tenant residential buildings, light commercial sites, and outdoor utility metering setups where group metering simplifies billing and load management. Its rugged outdoor enclosure and secure ring design make it well-suited for exterior installations with shared feeders and per-unit energy accounting.
This meter stack is UL Listed, confirming safety compliance for electrical equipment. It also carries utility approvals for field deployment in specific regions (for example AZ Tucson Electric Power and UniSource, and Dominion in NC/VA). These endorsements facilitate smoother utility interconnection and site acceptance.
Warranty is Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. The outdoor-rated enclosure and reliable metering hardware reduce field maintenance and service visits, contributing to lower lifecycle costs and faster project ROI on multi-tenant or multi-unit developments.