Enclosed Circuit Breakers (ECBs)
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Reliable, Code-Compliant Disconnect Solutions for Every Application
Keep people and equipment safe—and get power back online fast—with MCXP Solutions’ Enclosed Circuit Breakers. Built with individually UL-rated components and engineered for real-world reliability, our ECBs deliver a code-compliant means of disconnect for virtually any commercial or industrial application. We stock common frames and enclosure styles for quick-ship turnarounds, and we customize builds to your one-line, spec, and site conditions.
What Is an Enclosed Circuit Breaker?
An enclosed circuit breaker is a molded-case circuit breaker (MCCB) mounted inside a protective NEMA-rated enclosure. It provides local overcurrent protection and a lockable, visible means of disconnect, often required by code for service entrances, feeders, and large equipment. MCXP standardizes on rugged enclosures and proven MCCB platforms so you get dependable performance with shorter lead times.
Standard Scope & Ratings
*Final labeling and rating depend on specific bill-of-materials and jurisdictional requirements.
Why Choose MCXP Enclosed Breakers?
Quick-Ship Advantage
Factory lead times on disconnects can stall projects. MCXP carries common frame sizes, operators, and enclosures so we can build, test, and ship fast—without compromising safety or documentation.
Built for Your Environment
From climate-controlled mechanical rooms to coastal sites and washdown areas, we package breakers in the right enclosure for the job: NEMA 1 (indoor), 3R (outdoor), 4 (hose-down), 4X (corrosion-resistant stainless), and 12 (dust-tight). Hazardous-location builds (NEMA 7/9) are available for classified areas.
Flexible Operation & Integration
Pick flange or rotary operators, add door interlocks, and specify auxiliary contacts for remote status. We also provide cam-lock inlets, Kirk®/Castell® key interlocks, and labeling packages to fit your lockout/tagout and switching procedures.
Proven Protection
Every ECB is configured around a high-reliability MCCB platform, with options for ground-fault protection (GFP), 100% rated breakers, and Arc Flash Reduction Maintenance modes (ERMS/RELT/DAS/ARMS) to help reduce incident energy during maintenance.