Eaton 1MM520RRLBC Residential Meter Stack - NEMA 3R
Part Number: 1MM520RRLBC
Quick Summary
Eaton residential meter stack enables multi-metering for residential and light commercial service entrances. In practice, installers often struggle to route multiple meters safely while preserving panel density and service accessibility. UL Listed certification and a NEMA 3R enclosure ensure safety in outdoor or damp environments, while a copper bus and robust main bus rating support reliable, scalable metering. This solution aligns with modern metering product trends, delivering clear business value for utilities, property managers, and electrical contractors. By simplifying layout and maintenance, it reduces field time and supports compliant energy management across building portfolios. It also complements other Eaton low-voltage distribution products for cohesive installations.
Product Information
Extended Description
1MM520RRLBC Eaton: Eaton resi meter stack, Multiple metering, 200A, Cu, 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
1MM520RRLBC
UPC
782116960927
Product Length/Depth
13.5 in
Product Height
74.96 in
Product Width
6.87 in
Product Weight
96 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
Horn
Number of jaws
Four-jaw
Number of sockets
5
Phase
Single-phase in, single-phase out
Security
Ringless
Voltage rating
120/240 V
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 - 1MM520RRLBC
125A amperage rating matches typical residential service feeders, reducing the need for oversizing and ensuring safe breaker coordination. The business impact is improved panel utilization and lower utility gapping during peak load, which translates to cost efficiency and simpler planning for new builds or retrofit projects. Application: ideal for single-family homes and small multi-dwelling developments requiring reliable, scalable metering with room to expand. Copper bus with an 800A bus rating delivers high conductivity and robust fault current handling. The business impact includes improved energy accuracy across meters and long-term reliability in shared service environments. Application: used in multi-meter layouts where consistent conductor performance under heavy loads is critical, such as multi-residential or mixed-use buildings. Four-jaw clamps and five sockets enable versatile metering configurations with horn bypass for safe maintenance. The business impact reduces service interruptions during meter swaps and simplifies wiring topology. Application: supports multi-tenant metering and modular feeder arrangements in controlled, accessible electrical rooms. NEMA 3R enclosure provides weather resistance for outdoor or damp environments, while UL Listed confirms conformity to safety standards. The business impact includes lower field inspection risk and faster permit approval. Application: suitable for exterior installations, meter stacks at exterior walls, and utility access points. Ringless security with single-phase in/out and 120/240 V operation ensures straightforward integration with standard residential panels, with an interrupt rating depending on the selected main circuit breaker. The business impact is installation flexibility and upgraded fault protection without enclosure changes. Application: aligns with CCV2_X and similar secondary breakers for scalable metering.
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FAQs
The meter stack is designed for single-phase in/out service with 120/240V operation and supports up to five sockets and a four-jaw configuration. It uses a NEMA 3R enclosure for weather resistance and is UL Listed, making it suitable for outdoor installations adjacent to residential service entrances and light commercial applications.
With multiple metering capabilities, the 1MM520RRLBC provides four-jaw bussing and five sockets to accommodate several meters from a single enclosure. Its ringless design and horn bypass enable safe maintenance, while the copper bus and 800A bus rating ensure consistent measurement accuracy across tenants or accounts in multi-dwelling buildings.
Key specs include a 125A amperage rating, 800A bus rating, copper bus material, horn bypass, four-jaw configuration, five sockets, 120/240V operation, and a NEMA 3R enclosure. The product is UL Listed, and the interruption rating depends on the selected main circuit breaker, which offers design flexibility for different service configurations.
The product is UL Listed, confirming compliance with established electrical safety standards. It carries Eaton’s warranty policy, typically one year from installation or eighteen months from shipment, whichever occurs first, as outlined in Eaton policy 25-000. This combination supports reliability and predictable maintenance planning.
Consider the unit’s 96 lb weight, 13.5 in depth, and 6.87 in width for on-site handling. The ringless design, horn bypass, and 120/240V single-phase capability simplify wiring topology and meter swapping. Plan for compatibility with the selected main circuit breaker, as the interrupt rating varies accordingly, and ensure outdoor access for NEMA 3R protection.