Eaton U404430MCC Meter Breakers - 320A, 22kAIC, UL Listed
Part Number: U404430MCC
Quick Summary
The Eaton U404430MCC meter breakers provide reliable circuit protection in commercial and industrial electrical rooms. For engineers and procurement teams, finding a rugged, code-compliant meter protection solution that fits dense meter sockets and ring configurations is a common challenge. UL certification and EUSERC approval are two critical validations for utility coordination and field safety. Designed for surface-mount installation, their galvanized steel housing with ANSI 61 gray finish offers durability in harsh environments. The 320 A amperage rating and 22 kAIC interrupt rating deliver robust protection with fewer devices to manage, while the 1Ø/3W wiring and 4-jaw ring-capable design simplify installation and future maintenance. This product line aligns with Eaton's B-Line series, enabling scalable metering protection across facilities and projects.
Product Information
Extended Description
U404430MCC Eaton: Eaton B-Line series meter breakers, 320A, Manual circuit closing, 22 kAIC, Material-Galvanized steel, Surface mount, Number of wires 1Ø/3W, Studs, 4 jaws, 1 Position, Ring, 3R, Z3614
Product Name
Eaton B-Line series meter breakers
Catalog Number
U404430MCC
UPC
782051772401
Product Length/Depth
6 in
Product Height
47 in
Product Width
34 in
Product Weight
165 lb
Compliances
EUSERC Approved
Certifications
UL
Amperage rating
320 A
Interrupt rating
22 kAIC
Material
Galvanized steel
Finish
ANSI 61 gray paint Mill-galvanized
continuous rating meter socket jaws
continuous rating meter socket jaws
Eaton Specification Sheet - U404430MCC
Feature: 320 A amperage rating → Business Impact: Supports high-load metering feeders with fewer devices and simplified protection architecture, reducing overall cabinet footprint and maintenance costs. Application: Large commercial and industrial metering applications where system demand is high. Long-tail keywords: high-load metering, 320A protection, metering equipment efficiency. Feature: 22 kAIC interrupt rating → Business Impact: Enhances fault-current resilience, protecting upstream gear and improving safety margins during peak fault events. Application: Utility rooms and service entrances with elevated short-circuit levels. Long-tail keywords: high interrupt rating, fault-current protection, equipment protection. Feature: Galvanized steel with ANSI 61 gray finish → Business Impact: Provides corrosion resistance and durable aesthetics in harsh environments, lowering replacement cycles. Application: Indoor/outdoor meter enclosures and demanding industrial spaces. Long-tail keywords: galvanized steel enclosure, ANSI 61 finish, corrosion resistance. Feature: Surface-mount design with 1Ø/3W wiring and 4 jaws → Business Impact: Streamlines installation, reduces labor time, and enables reliable, repeatable wiring in tight utility spaces. Application: Meter socket mounting in 3R enclosures. Long-tail keywords: surface-mount protection, single-phase metering, four-jaw mounting. Feature: Ring, 3R, Z3614 compatibility → Business Impact: Facilitates flexible meter ring configurations and field adaptability, lowering retrofit costs. Application: Ring vs ringless metering arrangements in modern facilities. Long-tail keywords: ring-vs-ringless, meter ring configurations, retrofit metering. Feature: UL listing and EUSERC approval → Business Impact: Eases utility interconnection and compliance during audits, speeding project approval. Application: New builds and retrofit projects requiring formalized approvals. Long-tail keywords: UL listed metering equipment, EUSERC approved devices, metering compliance.
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FAQs
U404430MCC is designed for single-phase metering setups (1Ø/3W) in 3R enclosures with surface-mount installation. It uses 4 jaws and studs to accommodate common meter socket configurations, and its galvanized steel housing with ANSI 61 gray finish helps resist corrosion in utility and mechanical spaces. UL listing and EUSERC approval further validate compliance.
Key specifications include a 320 A amperage rating and a 22 kAIC interrupt rating, enabling strong fault-current protection. The unit is constructed from galvanized steel with ANSI 61 gray finish, designed for surface-mount installation in 3R enclosures. It supports 1Ø/3W wiring and uses four jaws with studs for secure, durable connections.
Yes. U404430MCC is suitable for both new metering installations and upgrades in facilities that utilize Eaton's B-Line series. Its high amperage and interrupt rating accommodate demanding service entrances, while UL and EUSERC listings facilitate utility approval and long-term compatibility with standard meter socket configurations.
The unit is UL-listed and EUSERC-approved, which matter for safety certification, electrical interconnection, and utility coordination. These certifications help ensure compliance with industry standards, reduce risk during commissioning, and streamline acceptance by utility providers during project handover.
Technical datasheets are available from Eaton, including the U404430MCC specification sheet and catalogs on the product page. Specifically, look for the Eaton Specification Sheet - U404430MCC and related documents such as continuous rating meter socket jaws and ring-vs-ringless metering guides to support correct installation and configuration.