Eaton 1MM412RRLBC Residential Meter Stack - UL Listed
Part Number: 1MM412RRLBC
Quick Summary
Eaton residential meter stack is a multi-meter solution for centralized power monitoring in residential and light commercial installations. Engineers often juggle space constraints, complex wiring, and future expansion; this unit consolidates metering while preserving service reliability. Key certifications include UL Listed and a NEMA 3R enclosure rating, supporting outdoor installation and long-term durability. With a 125A metering rating and an 800A bus, it enables scalable metering aligned with evolving energy-management strategies. Designed for 120/240V systems and compatibility with BR2_, BRH2_, BRHH2_ breakers, it delivers straightforward installation and compliant metering for modern buildings. This combination reduces field risk and improves metering accuracy.
Product Information
Extended Description
1MM412RRLBC Eaton: Eaton residential meter stack, Multiple metering, 125A, Copper, Bus: 800A, Horn bypass, NEMA 3R, Depends on selected main circuit breaker, Four-jaw, 4, Single-phase in/single-phase out, BR2_, BRH2_, BRHH2_, Ringless, 120/240V
Product Name
Eaton residential meter stack
Catalog Number
1MM412RRLBC
UPC
782114989937
Product Length/Depth
12.26 in
Product Height
48.5 in
Product Width
7.01 in
Product Weight
62 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
4
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
BR2_, BRH2_, BRHH2_
Residential and Light Commercial, Metering Products, Volume 1 Tab 4
Eaton Specification Sheet - 1MM412RRLBC
Feature: Multiple metering in a single enclosure; Business Impact: simplifies load management and reduces space requirements in multi-tenant or small commercial projects; Application: ideal for centralized monitoring in apartment buildings or retail spaces. Feature: 125A metering with an 800A bus rating; Business Impact: supports scalable service growth without rework, lowering total cost of ownership; Application: retrofit and new-build electrical rooms benefit from future-proofing. Feature: Copper bus with four-jaw sockets; Business Impact: ensures low resistance paths for reliable measurements and durable connections; Application: critical monitoring circuits and service feeders. Feature: Horn bypass and four sockets; Business Impact: enables quick service work and clear fault isolation while maintaining continuous power to non-tested circuits; Application: maintenance windows and upgrade scenarios. Feature: Ringless, 120/240V, NEMA 3R enclosure; Business Impact: outdoor-ready protection and straightforward installation in harsh environments; Application: outdoor meter installations and exposed electrical rooms. Feature: Compatibility with BR2_, BRH2_, BRHH2_ secondary breakers; Business Impact: simplifies breaker coordination and reduces field debugging; Application: user-friendly integration with Eaton protection devices. Feature: Certifications UL Listed; Business Impact: substantiates compliance and customer trust, reducing risk in regulated projects; Application: building codes and utility program requirements. Insight: Industry-standard metering stacks like this one are increasingly adopted to streamline energy-management workflows and support smarter grid-ready installations.
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FAQs
For retrofit installations, verify space for a 48.5 in tall, 7.01 in wide enclosure and ensure mounting surface can support a 62 lb assembly. Plan routing for four-jaw, four-socket metering connections and ensure 120/240V supply with appropriate labeled feeders. The unit’s NEMA 3R rating supports outdoor compatibility, reducing enclosure modifications and permitting simpler field deployment.
The 125A metering rating defines the maximum monitored load per phase, while the 800A bus rating handles higher feeder currents without compromising measurement accuracy. This enables accurate load profiling for energy management and reduces the need for early main-breaker upgrades. Use appropriate main breaker sizing to align with utility service requirements and ensure proper protection coordination.
Yes, the meter stack is designed for outdoor environments thanks to its NEMA 3R enclosure, which provides rain and corrosion resistance. It is UL Listed, confirming compliance with safety and performance standards for electrical assemblies installed in exposed or damp locations.
Compatible secondary breakers include BR2_, BRH2_, and BRHH2_. This compatibility simplifies panel coordination and reduces field debugging during installation or future expansion. Ensure the chosen secondary breaker matches the main service configuration and aligns with the overall protection strategy for reliable energy metering.
Adopting a multi-meter stack reduces space, simplifies wiring, and lowers maintenance labor by consolidating metering in a single enclosure. Over time, engineers benefit from easier access for testing and fewer field connections, leading to lower outage duration and improved energy monitoring accuracy, which translates to better utility cost control and faster project deployment.