Eaton residential meter stack 1MM420RRLBCPS - NEMA 3R
Part Number: 1MM420RRLBCPS
Quick Summary
The Eaton residential meter stack is a compact, multi-meter solution for indoor residential and small commercial power monitoring. It minimizes floor space and speeds installation with front-access metering, four-jaw bus connections, and a rugged ringless design. UL Listed, NEMA 3R enclosure, and CPSB approval support regulatory compliance across multiple sites and utility programs. With 200 A amperage and an 800 A bus rating, it supports scalable metering for growing loads and easier panel integration. Designed for residential metering and light commercial projects, these features reduce field labor, accelerate commissioning, and improve overall distribution reliability. Its robust construction helps utilities and contractors meet aggressive timelines while delivering greater asset visibility.
Product Information
Extended Description
1MM420RRLBCPS Eaton: Eaton resi meter stack, SS meter guides, Multiple metering, 200A, Al, Bus: 800A, Horn bypass, NEMA 3R, Four-jaw, 4, 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
1MM420RRLBCPS
UPC
786685525822
Product Length/Depth
13.5 in
Product Height
64.5 in
Product Width
7.01 in
Product Weight
102 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
Catalog Notes
CPS approved, For indoor applications where a top endwall with knockouts is needed, order (1) of MM12N1WLK. 1MM units do not come with 5th jaw.
Special features
SS meter guides
Type
Multiple metering
Amperage Rating
200A
Bus material
Aluminum
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
Utility approvals
TX : City Public Service of San Antonio (CPSB)
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 - 1MM420RRLBCPS
Feature: The 200 A amperage rating paired with an 800 A bus rating supports four simultaneous meters and headroom for future load growth. This translates to fewer main changes, lower upgrade costs, and a more scalable distribution solution. Application: Ideal for multi-dwelling units and light commercial projects where meters must fit in compact spaces without compromising service continuity. Feature: Four-jaw, four sockets with horn bypass streamline wiring and maintenance. Business Impact: Reduces time to energize or de-energize circuits while allowing safe bypass during service without full disconnection. Application: Useful for CPS-approval installations and utility metering tasks where quick fault isolation is needed. Feature: SS meter guides improve alignment for single-phase metering with front-access installation. Business Impact: Ensures accuracy, reduces rework, and speeds commissioning in dense layouts. Application: Ideal for residential stacks and retrofit projects where precision matters. Feature: NEMA 3R enclosure provides weather resistance for indoor and outdoor applications. Business Impact: Enhances durability, supports year-round operation, and protects metering electronics. Application: Suitable for outdoor rooftops and covered areas in mixed climate regions. Feature: UL Listed and CPSB approved for regulatory compliance across utility programs. Business Impact: Reduces acceptance risk and streamlines procurement. Application: Utilities and contractors delivering compliant residential metering quickly. Feature: Dimensions and weight mirror real-world install constraints (13.5 in depth, 64.5 in height, 7.01 in width; 102 lb). Business Impact: Facilitates precise site planning and mounts compatibility. Application: Ideal for space-constrained installations in retrofit and new builds.
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FAQs
For indoor installations, ensure space for a 64.5 in tall, 7.01 in wide enclosure with a 13.5 in depth. The unit uses front-access metering with four-jaw sockets and a horn bypass, and it is designed for top endwall knockouts where approved. Use MM12N1WLK accessory if indoor knockout configurations are needed.
The stack supports 200 A amperage with an 800 A bus rating, provides single-phase in and out, and operates at 120/240 V. It features four sockets, four jaws, aluminum bus material, a ringless design, and a NEMA 3R enclosure for robust protection.
Yes. The product is UL Listed and CPS approved for use in Texas CPSB programs. These certifications help meet utility acceptance criteria and streamline procurement and commissioning on regulated projects.
It is a multiple metering type with four sockets and four jaws, designed for single-phase in and single-phase out configurations. This enables flexible metering for multi-branch services, reducing equipment redundancy and aligning with residential or light commercial metering strategies.
The compact footprint, front-access design, and four-jaw configuration reduce field labor and commissioning time. Its NEMA 3R rating and CPS approvals minimize site-specific risk, while the 200 A/800 A rating supports future load growth, potentially lowering total cost of ownership over the asset life.