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Square D EZMR314225 - Main Breaker 225A 3-Phase 240V

Square D
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Square D EZMR314225 is a three-phase, 225-amp main circuit breaker panel designed for overcurrent protection and power distribution in commercial and industrial electrical systems. This unit operates at 240V AC with a 22kAIC rating, utilizing a bolt-on connection type and a 3-pole configuration for reliable branch circuit management. The panel measures 52.00 inches in height, 17.38 inches in width, and 8.09 inches in depth, weighing 91 lb, and features a NEMA 1 enclosure for indoor installation with a copper bus type. It complies with UL 67 and CSA standards, ensuring adherence to North American safety and performance requirements. Typical applications include service entrance equipment, lighting and appliance panelboards, and feeder distribution in factories, warehouses, and large commercial facilities.

Key Features & Specifications
  • Type: Main circuit breaker panel, NEMA 1 enclosure, copper bus
  • Voltage Rating: 240V AC
  • Current Rating: 225A
  • Dimensions: 52.00 in (1320.80 mm) x 17.38 in (441.45 mm) x 8.09 in (205.49 mm) (Height x Width x Depth)
  • Standards: UL 67, CSA
  • Applications: Service entrance, lighting and appliance panelboards, feeder distribution
  • Switch Type: Main breaker
  • Configuration: 3-phase, 4-wire
  • Coil Voltage Maximum: Not applicable (main breaker)
  • Temp Rating: 60/75°C
  • Shipping Dimensions: 52.00 in x 17.38 in x 8.09 in
  • Phase: 3
  • Voltage: 240V AC
  • Amperage: 225A
  • AIC rating: 22kA
  • Connection: Bolt-on
  • Poles: 3
  • Protection: Overcurrent
  • Functions: Main disconnect and distribution
  • Frame Size: EZMR3
  • Trip Type: Thermal-magnetic
  • Panel Type: Main breaker load center
  • Breaker Type: EZMR
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Up to 300 kcmil
  • Metal Type: Steel
  • Panel Style: Surface mount
  • Bus Type: Copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 60/75°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Surface
  • Hz: 60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 225A
  • Dist Voltage: 240V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 225A
  • Full Load Amp Minimum: 0A
  • Enclosure: NEMA 1
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper or aluminum
  • Amperage Maximum: 225A
  • Amperage Minimum: 0A
  • Nema Rating: 1
  • Switch Style: Main breaker
  • Wire Size: 14 AWG to 300 kcmil
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Bolt-on
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-phase, 4-wire
  • Standards: UL 67, CSA C22.2
  • Compatible Frames: EZMR3
  • Installation Type: Surface mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: EZMR3
  • Current Rating: 225A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 78590129960
  • GTIN: 00785901299608