Eaton 3MM520R12RLB Residential Meter Stack - UL Listed
Part Number: 3MM520R12RLB
Quick Summary
Eaton 3MM520R12RLB residential meter stack is a multi-metering solution designed for outdoor installations in residential and light-commercial applications. When wiring and space are at a premium, installers struggle with cluttered panels and miswired feeders; this stack simplifies routing with a compact, 5-jaw design and a 200A service. UL Listed certification underpins safety, reliability, and code compliance, while the rugged outdoor design stands up to weather and utility-grade demands. For project engineers and electricians, the combination of a 1200A bus, 120/208V capability, and straightforward metering topology delivers faster commissioning, easier maintenance, and predictable ROI.
Product Information
Extended Description
3MM520R12RLB Eaton: Eaton 3MM residential meter stack, Multiple meter, 200A, Al, Bus:1200A, Horn by, 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, Ringless, Socket:200A, 120/208V
Product Name
Eaton 3MM residential meter stack
Catalog Number
3MM520R12RLB
UPC
786685010847
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 - 3MM520R12RLB
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Outdoor multi-metering stack consolidates meters into a single enclosure, reducing panel footprint and installation time. Business Impact: Lower labor costs and simplified permit processes lead to faster project timelines. Application: Ideal for outdoor residential and light-commercial sites with shared feeders. Feature: 200A service rating with a 1200A bus supports future metering capacity and load growth. Business Impact: Scales with demand, reducing the need for early upfits and service upgrades. Application: Building expansions and multi-tenant developments where metering needs may evolve. Feature: 5-jaw sockets and a 3-phase in, 1-phase out configuration simplify connections and wiring management. Business Impact: Improves installation reliability, minimizes miswiring events, and shortens commissioning time. Application: New installs and retrofit projects in outdoor enclosures. Feature: 120/208V compatibility broadens utility and equipment interoperability. Business Impact: Seamless integration with common distribution schemes reduces retrofit risk. Application: Outdoor metering in regions using 120/208V service. Feature: UL Listed certification and rugged outdoor construction deliver safety and compliance. Business Impact: Supports code adherence and reduces inspection friction, enabling faster approvals. Application: Commercial and residential outdoor installations requiring certified metering solutions. Feature: Weight and dimensions (approx. 106 lb, 74.96 in height, 13.5 in depth, 6.87 in width) inform mounting and enclosure planning. Business Impact: Predictable fitment and easier logistics, reducing site surprises. Application: Roof or wall-mounted outdoor stacks where vertical space is available and weight tolerance is considered. Feature: Compatibility with Eaton MCBs and system components provides installation flexibility. Business Impact: Avoids forced equipment changes and enables tailored metering configurations. Application: Projects with defined MCB strategies and modular enclosure planning. Feature: Warranty and support (Eaton Selling Policy 25-000) offer post-installation assurance. Business Impact: Lower long-term risk and clearer maintenance budgeting. Application: Projects prioritizing vendor-backed service levels and reliable parts supply.
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FAQs
The Eaton 3MM520R12RLB is a multiple metering stack designed for outdoor applications, supporting up to three metering configurations with a 200A service and a 1200A bus. It uses 5-jaw sockets and a 3-phase in, 1-phase out arrangement, enabling compact, scalable metering while preserving safety and code compliance in shared-property environments.
Installers should plan for a compatible MCB selection, ensure the enclosure can accommodate a 200A service and a 1200A bus, and confirm outdoor mounting suitability. The unit uses 5-jaw sockets and supports 120/208V with a 3-phase in, 1-phase out configuration, so verify wiring paths, clearances, and conduit routing before mounting.
Yes, the 3MM520R12RLB is UL Listed, indicating compliance with recognized safety standards for electrical equipment. When installing, follow the manufacturer’s guidelines and local electrical codes to ensure proper installation, weatherproofing, and secure mounting in outdoor environments.
The product carries Eaton’s standard policy: a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This warranty reduces long-term risk, supports maintenance budgeting, and contributes to ROI through improved reliability, lower fault-related downtime, and predictable service costs.
Outdoor installation challenges such as space constraints, wiring complexity, and multi-meter coordination are mitigated by the 3MM520R12RLB’s compact footprint, 5-jaw sockets, and 3-phase in with 1-phase out configuration. Its outdoor-rated design and UL Listed certification help streamline inspections, while the 200A service and 1200A bus support scalable metering as loads grow.