Eaton residential meter stack 1MM520RRLB - UL Listed
Part Number: 1MM520RRLB
Quick Summary
The Eaton residential meter stack is a multi-metering enclosure designed for single-phase service with up to 200A per meter and an 800A bus. This solution addresses space constraints, by-pass considerations, and the need for coordinated metering and main breakers in compact electrical rooms. It carries UL Listed safety certification and a rugged NEMA 3R enclosure to withstand exposure and weather-rated installations. By leveraging aluminum bus construction and a four-jaw design, this meter stack supports reliable, code-compliant distribution in both residential and light commercial settings. For engineers and procurement teams, it offers a dependable, scalable platform that reduces integration time and total installed cost while improving service reliability.
Product Information
Extended Description
1MM520RRLB Eaton: Eaton resi meter stack, Multiple metering, 200A, Al, Bus: 800A, Horn bypass, NEMA 3R, Depends on selected main circuit breaker, Four-jaw, 5, Single-phase in/single-phase out, CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM, Ringless, 120/240V
Product Name
Eaton residential meter stack
Catalog Number
1MM520RRLB
UPC
782116934829
Product Length/Depth
13.5 in
Product Height
74.96 in
Product Width
6.87 in
Product Weight
100 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
Amperage Rating
200A
Bus material
Aluminum
Bus Rating
800 A
Bypass
Horn
Number of jaws
Four-jaw
Number of sockets
5
Phase
Single-phase in, single-phase out
Security
Ringless
Voltage rating
120/240 V
Utility approvals
IA : Alliant (IP&L and WP&L) WI : Alliant (IP&L and WP&L) MD : First Energy (Potomac Edison) VA : First Energy (Potomac Edison) WV : First Energy (Mon Power) NJ : First Energy (Jersey Central Power and Light) OH : First Energy (Ohio Edison, Toledo Edison, The Illuminating Company) PA : First Energy (Allegheny Power, MET ED, Penelec, West Penn Power) PA : PECO Energy KY : Louisville Gas & Electric/Kentucky Utilities NY : Central Hudson Gas & Electric (CHG&E)
Enclosure
NEMA 3R
Interrupt rating
Depends on selected main circuit breaker
Secondary circuit breaker
CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM520RRLB
Feature → Business Impact → Application: Multi-metering capability enables simultaneous measurement across circuits, reducing separate enclosures and associated wiring costs in multi-tenant or multi-dwelling installations. This translates to lower footprint in equipment rooms and faster commissioning for new builds or retrofits. Application: residential and light commercial metering projects requiring centralized monitoring of up to five sockets at 120/240 V with a 200 A per-meter rating. Feature → Aluminum bus with 800 A bus rating improves current handling and reduces weight during installation without compromising durability. Business impact: easier field mounting, safer handling, and long-term reliability in high-use environments. Application: new construction or upgrade projects in confined spaces where weight and space optimization matter. Feature → Four-jaw, ringless design minimizes stray currents and simplifies wiring routes, improving insulation integrity and service continuity. Business impact: lower maintenance needs and faster fault isolation. Application: multi-meter stacks in dense electrical rooms or retrofit scenarios where service interruptions must be minimized. Feature → Horn bypass and NEMA 3R enclosure provide practical fault isolation and weather-rated protection. Business impact: enhanced safety, reduced enclosure wear, and compliance with outdoor or semi-exposed installations. Application: outdoor meter stacks or indoor installations with occasional exposure to dust or moisture. Feature → Secondary circuit breaker compatibility (CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM) ensures scalable protection options. Business impact: modular upgrade path to meet evolving protection requirements. Application: projects requiring tailored protection schemes for multi-meter configurations. Feature → UL Listed certification confirms safety compliance for industrial and utility-adjacent environments. Business impact: simplifies procurement approvals and reduces risk of non-compliance audits. Application: code-compliant installations in residential and light commercial builds. By aligning these features with practical installation considerations, this Eaton meter stack delivers predictable performance, regulatory alignment, and measurable efficiency gains for project stakeholders.
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FAQs
Ensure adequate mounting space for a 74.96 inch high enclosure and 13.5 inch depth. Verify ceiling and floor clearances, alignment with main breaker space, and access to the 120/240 V feed. Wire routing should accommodate four-jaw, ringless design and allow room for CCV2_X or similar secondary breakers. Follow UL Listed and NEMA 3R guidelines for outdoor or semi-exposed locations.
The unit supports multiple metering with five sockets and a 200A per meter rating, consolidating meters into a single, compact enclosure. This reduces cabinet count, simplifies billing and service separation, and minimizes wiring complexity. It also streamlines utility coordination and accelerates commissioning for multi-tenant projects while maintaining code compliance.
This meter stack lists CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, and CVH2_XMM as compatible secondary breakers. This compatibility provides flexible protection schemes for multi-meter configurations, enabling tailored protection per circuit and easier future upgrades without reconfiguring the main assembly.
UL Listed certification ensures recognized safety compliance for residential and light commercial installations, while the NEMA 3R enclosure rating supports outdoor or semi-exposed service environments. These ratings help simplify procurement approvals, reduce design risk, and support code-compliant distributions in diverse installation scenarios.
ROI comes from reduced enclosure footprint, fewer cabinets, and simplified wiring for multi-meter installations. The 200A per-meter rating and 800A bus capacity accommodate larger loads without frequent upgrades, while UL/NEMA ratings lower maintenance and compliance costs. Field efficiency, faster commissioning, and improved reliability contribute to lower lifecycle costs.