Eaton 3MM320RRLC Residential Meter Stack - UL Listed
Part Number: 3MM320RRLC
Quick Summary
Eaton 3MM320RRLC residential meter stack provides multi-metering for 200A outdoor service installations. Engineers and installers face pressure to fit metering into compact spaces without sacrificing safety or accuracy, and this solution addresses that by delivering a rugged, outdoor-ready enclosure with factory-ready metering. UL Listed safety certification confirms compliance, while the robust 800A bus rating and 120/208 VAC capability support scalable metering for growing facilities. Designed for residential and light commercial applications, it reduces integration time and streamlines procurement, complementing Eaton’s broader metering product family. The unit’s no bypass, ringless design simplifies maintenance and preserves measurement integrity, contributing to lower total cost of ownership and improved energy management across properties.
Product Information
Extended Description
3MM320RRLC Eaton: Eaton 3MM residential meter stack, Multiple metering, 200A, Cu, Bus:800A, No bypass, Outdoor, Depends on selected MCB, 5-j, Sockets:3, 3-ph in, 3-ph out, A-B, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ringless, Socket:200A, 120/208 Vac
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM320RRLC
UPC
782114990773
Product Length/Depth
13.5 in
Product Height
52.35 in
Product Width
7.01 in
Product Weight
69 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 - 3MM320RRLC
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Multi-metering capability enables independent monitoring across tenants, improving revenue accuracy and energy management; reduces manual metering errors and disputable billing, ideal for multi-tenant residential or light commercial buildings. Application: Use in apartment complexes or shared facilities where separate circuits must be tracked without multiple standalone meters. Feature → Business Impact → Application: Outdoor-rated enclosure and UL Listed safety provide weather resistance and compliance for exterior installations; helps avoid indoor space constraints and enhances safety in exterior wiring domains. Application: Exterior meter enclosures mounted on building facades or dedicated service pedestals. Feature → Business Impact → Application: 800A bus rating with 200A socket and 3-phase in/out supports scalable, high-accuracy metering for growing loads; reduces future hardware upgrades and service disruptions. Application: High-demand sites with expanding tenant loads or commercial spaces needing reliable three-phase metering. Feature → Business Impact → Application: Ringless, no-bypass design improves maintenance accessibility and measurement integrity, lowering service calls and misreads. Application: Routine metering verification and routine commissioning in outdoor installations. Feature → Business Impact → Application: Compatibility with selected Eaton MCBs simplifies installation and reduces procurement complexity; minimizes engineering time and mismatch risks. Application: Retrofit or new builds where Eaton MCBs are already part of the electrical strategy. Feature → Business Impact → Application: Compact footprint and integrated metering reduce enclosure footprint and installation time, delivering faster project handoff and lower labor costs. Application: Urban or space-constrained developments requiring efficient meter stack deployment.
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FAQs
Installers should verify 120/208 VAC service, route three-phase conductors to the in/out terminals, and select the compatible MCBs. The unit is ringless with a 200A socket and an 800A bus, designed to integrate cleanly with existing Eaton electrical distributions while meeting outdoor installation safety requirements.
Key specs include 200A socket, 800A bus, 120/208 VAC operation, and three-phase in/out for multi-metering. It is intended for outdoor use and carries UL Listed safety certification, providing reliable metering for multiple circuits within a single enclosure.
Yes. The 3MM320RRLC is purpose-built for residential multi-metering, enabling separate metering per tenant or circuit while sharing a common outdoor enclosure. It supports scalable metering for growing facilities and helps streamline tenant billing with accurate measurements.
The product is UL Listed, confirming compliance with recognized electrical safety standards for distributed metering equipment. While CE and IP ratings are not specified in the data, the UL listing and outdoor-ready design provide confidence in safety, reliability, and suitability for exterior installations.
Warranty terms follow Eaton’s policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. For ongoing support, refer to Eaton’s warranty documentation and service resources to understand coverage, maintenance guidance, and eligibility for replacements or repairs.