EZM31200GCBU voltage correction: Catalog EZM31200GCBU identifies Square D's 1200-amp main circuit-breaker section for an underground, three-phase four-wire EZ Meter-Pak service. Schneider limits this catalog number to 240VAC maximum; it is not a 480Y/277-volt unit.
EZM31200GCBU specifications
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Catalog number: EZM31200GCBU
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Main rating: 1200A
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System: 3-phase, 4-wire, 240VAC maximum
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Interrupting rating: 65kA
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Service entry: Underground
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Enclosure: NEMA Type 3R
Main section—not a meter branch stack
This cabinet provides the main breaker function for an engineered EZ Meter-Pak lineup. Meter branches, transition sections, pull boxes, conductors, and other lineup parts are separate unless explicitly included.
Service-design review
Confirm the one-line diagram, utility approval, available fault current, service conductors, grounding, bus capacity, adjoining sections, and underground entry geometry. Installation requires utility coordination and qualified electrical professionals.