Square D EZ Meter-Pak Main Circuit Breaker Unit, 1200A, 240VAC, 3-Phase/4W, 100kA, Type 3R, ERMS

Square D EZ Meter-Pak Main Circuit Breaker Unit, 1200A, 240VAC, Type 3R

The Square D EZM31200JCBUMS is a main circuit breaker unit for EZ Meter-Pak meter center assemblies. Rated 1200A at 240VAC maximum with a 1200A bus and 100kA interrupting rating, this main unit supports 3-phase, 4-wire underground feed configurations and is equipped for Energy Reduction Maintenance Setting (ERMS). NEMA 3R enclosure rating makes it suitable for outdoor and semi-protected installations.

Key Specifications

• Amperage: 1200A
• Voltage: 240VAC max
• Phase: 3-Phase, 4-Wire
• Bus Rating: 1200A
• Interrupting Rating: 100kA
• Feed: Underground (UG)
• Enclosure Type: NEMA 3R
• Mounting: Wall Mount
• ERMS: Yes
• Product Type: Meter Center Main Unit
• Model: EZM31200JCBUMS
• UPC: 78590106929
• Manufacturer: Square D (Schneider Electric)

Features & Benefits

• 1200A main breaker provides high-capacity service entrance protection for large commercial and multi-family residential applications
• 100kA interrupting rating meets demanding short-circuit current requirements
• ERMS capability supports arc flash energy reduction during maintenance per NFPA 70E
• NEMA 3R enclosure rating suitable for outdoor applications exposed to rain and sleet
• Wall mount design for flexible field installation
• Underground feed configuration for utility service entering from below grade

Applications

Designed for large commercial, multi-tenant, and multi-family residential meter center assemblies requiring a 1200A main service entrance with underground utility feed. Used as the main overcurrent protection device in EZ Meter-Pak meter stacks for apartment complexes, commercial buildings, and other high-demand electrical service installations.