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Square D NQNL4 - Panelboard Interior 225A 240V AC

Square D
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The Square D NQNL4 is a panelboard interior designed for use as a main lug or main breaker load center in commercial and industrial power distribution systems. It is rated for 240V AC and 225A maximum, providing overcurrent protection for branch circuits. The unit features a 4-jaw, 4-wire, 3-phase, 4-wire configuration with an aluminum bus, a 22kA short-circuit current rating at 240V AC, and is constructed for surface or flush mounting. This panelboard complies with UL 67 and NEMA standards, ensuring reliable performance in demanding environments. Typical applications include lighting, appliance, and power distribution in factories, warehouses, and large commercial facilities.

Key Features & Specifications
  • Type: Panelboard interior, main lug/main breaker, aluminum bus
  • Voltage Rating: 240V AC
  • Current Rating: 225A
  • Dimensions: 4-jaw, 4-wire
  • Standards: UL 67, NEMA
  • Applications: Commercial and industrial power distribution
  • Switch Type: Main lug or main breaker
  • Configuration: 3-phase, 4-wire
  • Phase: 3
  • Voltage: 240V AC
  • Amperage: 225A
  • AIC rating: 22kA at 240V AC
  • Connection: 4-wire
  • Poles: 4
  • Protection: Overcurrent
  • Frame Size: NQ
  • Panel Type: Load center
  • Breaker Type: Main lug/main breaker
  • Metal Type: Aluminum
  • Panel Style: Surface or flush mount
  • Bus Type: Aluminum
  • Mounting: Surface or flush
  • Hz: 60
  • Enclosure: Not included (interior only)
  • Nema Rating: NEMA 1
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Mechanical
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 67, NEMA
  • Installation Type: Surface or flush
  • Item QTY: 1
  • Breaker Frame: NQ
  • Current Rating: 225A
  • Operating Temperature Maximum Celsius: 40°C


Product Identification
  • UPC: 78590166613
  • GTIN: 00785901666134