Eaton 1MM520RRLC Residential Meter Stack - UL Listed
Part Number: 1MM520RRLC
Quick Summary
The Eaton residential meter stack 1MM520RRLC provides multiple metering for 200A residential service installations. It helps reduce panel clutter and simplify multi-load metering in space-constrained installations. UL Listed certification ensures safety and reliability, while the NEMA 3R enclosure supports outdoor or damp locations. Dominion utility approvals further ease grid integration, and the stack remains compatible with common main breakers for scalable metering. This combination supports faster commissioning and a predictable maintenance window. Secondary options and clear Eaton documentation help engineers design compliant, future-ready metering solutions.
Product Information
Extended Description
1MM520RRLC Eaton: Eaton resi meter stack, Multiple metering, 200A, Cu, Bus: 800A, No 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
1MM520RRLC
UPC
782116928132
Product Length/Depth
13.5 in
Product Height
74.96 in
Product Width
6.87 in
Product Weight
120 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
125A
Bus material
Copper
Bus Rating
800 A
Bypass
None
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
NC : Dominion VA : Dominion
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 - 1MM520RRLC
Selling Policy 25-000 - Distribution and Control Products and Services
Multi-metering with a 125 A main and an 800 A bus enables independent measurement of feeders within a single enclosure, reducing the need for separate meters and consolidating data streams for accurate billing and fault isolation. This topology supports faster service connections, simplified wiring, and a scalable metering architecture ideal for 200 A residential services and light commercial installations. The design accommodates four sockets and a single-phase in/out configuration to match common utility needs. Weather-resistant NEMA 3R enclosure and ringless design deliver reliable protection in outdoor and damp environments, minimizing corrosion risk and service interruptions. The four-jaw, four-socket arrangement streamlines field wiring, reduces torque errors, and supports consistent, repeatable terminations. Bypass-free operation further enhances safety by eliminating hidden paths for fault currents. Compatibility with secondary breakers CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, and CVH2_XMM provides a practical upgrade path as loads grow, without replacing the stack. This flexibility lowers life-cycle costs and simplifies retrofits for evolving building codes and energy programs. The 120/240 V single-phase in/out alignment also eases panel integration with standard feeders. UL Listed certification confirms compliance with safety standards, while Dominion utility approvals support grid adoption and utility acceptance. The combination of a robust enclosure, permissible fault protection, and listed components helps designers and installers meet regulatory requirements with confidence. Documentation and product data sheets from Eaton further reduce field questions during commissioning. Installation advantages include a compact yet robust form, copper bus material, and a well-defined cable routing path that minimizes miswiring and rework. The product is backed by Eaton's warranty policy, offering one year from installation or eighteen months from shipment, whichever occurs first, which helps protect project budgets and uptime commitments.
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FAQs
The 1MM520RRLC is designed for residential service installations requiring multiple metering points within a single enclosure. With a 125 A main, 800 A bus, four-jaw design, and 120/240 V single-phase capability, it suits 200 A residential services and light commercial applications where space is limited and metering must be consolidated for accurate billing and load management.
The four-jaw design paired with five sockets simplifies conductor termination and enables orderly, repeatable connections for feeders and sub-loads. This reduces field wiring errors, shortens commissioning time, and improves reliability. The ringless construction further enhances safety by minimizing tamper paths and maintaining a clean, verifiable metering configuration.
Yes. The product is UL Listed and uses a NEMA 3R enclosure, addressing safety and environmental protection. Dominion utility approvals also support grid acceptance, easing utility coordination and compliance during new installations or upgrades. Documentation from Eaton further aids engineers and inspectors in demonstrating regulatory conformity.
Absolutely. The 1MM520RRLC supports multiple secondary breakers including CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, and CVH2_XMM, enabling a future-proof upgrade path as loads grow or codes change. This flexibility minimizes total cost of ownership by avoiding complete stack replacement for load expansion or reconfiguration.
Eaton provides a warranty of one year from the date of installation or eighteen months from shipment, whichever occurs first. This coverage, combined with Eaton’s technical documentation and support resources, helps ensure reliable performance, rapid issue resolution, and predictable uptime for both residential and light commercial projects.