Eaton 1MM520RC residential meter stack - UL Listed
Part Number: 1MM520RC
Quick Summary
An Eaton residential meter stack provides multi-metering for 200A service entrances in multi-tenant buildings. Managing unit-by-unit loads and staying compliant with evolving electrical codes can slow projects and increase risk. UL Listed safety certification and a NEMA 3R enclosure help ensure reliable outdoor performance and regulatory compliance. Designed for low-voltage power distribution, this meter stack simplifies procurement, reduces field wiring complexity, and accelerates project timelines for utilities, property managers, and electrical contractors. The stack supports multiple metering modules, four-jaw design, and 120/240V single-phase service, making it a versatile choice for residential and small commercial installations. In addition, its compatible accessory options support scalable metering layouts across varied building configurations.
Product Information
Extended Description
1MM520RC Eaton: Eaton resi meter stack, Multiple metering, 200A, Copper, 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, Ring, 120/240V
Product Name
Eaton residential meter stack
Catalog Number
1MM520RC
UPC
782116928125
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
200A
Bus material
Copper
Bus Rating
600 A
Number of jaws
Four-jaw
Number of sockets
5
Phase
Single-phase in, single-phase out
Security
Ring
Voltage rating
120/240 V
Utility approvals
ID : Idaho Power OR : Idaho Power WA : Seattle City Light AK : Anchorage Municipal Light & Power NV : NV Energy WA : Puget Sound Energy WA : Tacoma Public Utilities 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 - 1MM520RC
Feature: Multiple metering capability enables simultaneous measurement across units. Benefit: Reduces equipment redundancy and allows accurate, centralized data collection for each unit. Application: Ideal for multi-tenant residential buildings and light commercial campuses seeking streamlined energy management. Feature: Four-jaw design with five sockets and copper bus provides robust current handling. Benefit: Improves load accuracy, reduces voltage drop, and supports future capacity expansion while maintaining reliable distribution. Application: Suitable for 200A service entrances and retrofit projects where space and performance must align. Feature: Single-phase in/out with 120/240 V rating simplifies wiring and compatibility. Benefit: Eases installation and minimizes wiring errors, shortening on-site labor time. Application: Common in residential metering cabinets and small utilities installations. Feature: NEMA 3R enclosure and UL Listed certification enable outdoor use with weather resistance and safety compliance. Benefit: Protects meters from the elements and meets regulatory requirements, reducing service interruptions. Application: Outdoor metering enclosures in apartment complexes and mixed-use facilities. Feature: Secondary circuit breaker compatibility (CCV2_X, CCVH2_X, CVS2_XMM, CV2_XMM, CVH2_XMM) ensures flexible protection schemes. Benefit: Supports selective coordination and maintenance without replacing existing infrastructure. Application: Retrofit projects and new builds requiring modular metering protection. Feature: Warranty and service support per Eaton policy provides lifecycle assurance. Benefit: Reduces total cost of ownership through predictable coverage and readily available replacement parts. Application: Procurement programs for building owners and electrical contractors who value long-term support.
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FAQs
The 1MM520RC is designed for outdoor use in a NEMA 3R enclosure, which provides weather resistance. Installers should verify that the location is suitable for outdoor metering, ensure proper clearances around the four-jaw, five-socket assembly, and coordinate with utility service requirements for UL Listed compliance and 200A service ratings. Use appropriate enclosure mounting, grounding, and conductor sizing per local codes to maintain performance and safety.
The unit supports multiple metering channels through its four-jaw configuration and five sockets, enabling several sub-meters to be installed within a single cabinet. This setup is ideal for multi-tenant residential buildings or small-scale commercial facilities, allowing centralized measurement while isolating individual unit loads for accurate billing and energy management.
Yes. The 1MM520RC carries UL Listed certification and is housed in a NEMA 3R enclosure, which is specifically designed for outdoor installations. This combination ensures safety, robustness against weather exposure, and compliance with applicable electrical standards, making it a reliable choice for external metering applications.
This meter stack is best suited for residential and light commercial metering in multi-unit dwellings, campuses, and property management scenarios. Its multi-metering capability, copper bus, and compatibility with various secondary breakers make it a versatile option for centralized energy measurement, reduced wiring complexity, and streamlined contractor workflows.
Eaton provides a warranty per policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Routine maintenance focuses on visual inspection of the enclosure, verification of conductor terminations, and periodic testing of the metering connections to ensure continued accuracy and safety. For parts and service, consult Eaton’s authorized distributors.