Standards and Ratings

NQ circuit breaker panelboards meet US and Canadian standards, and are marked cULus. NQ circuit breaker panelboards accept QO™ and QOB branch circuit breakers.

Voltage System System Diagram
120/240 Vac 1Ø3W
208Y/120 Vac 3Ø4W
240/120 Vac 3Ø4W Delta
240 Vac 3Ø3W Delta
240 Vac 3Ø3W Grd. BØ Delta
48 1Ø Vdc 1Ø2W


NQ circuit breaker panelboards are designed, manufactured, and tested to comply with the following standards:

  • UL 67—Standard for Panelboards

  • UL 50—Enclosures for Electrical Equipment

  • CSA C22.2, No. 29-M1989—Panelboards and Enclosed Panelboards

  • CSA C22.2, No. 94-M91—Special Purpose Enclosures

  • NEMA PB 1—Panelboards

  • NFPA 70—National Electrical Code® (NEC®)

  • Federal Specification W-P-115C Type I Class 1—Circuit Breaker Panelboards

  • ASCE 7-05, ASCE 7-10, IBC 2009, IBC 2012, CBC 2010, CBC 2013, CBC 2016, NBCC 2015 Seismic Qualification, and OSHPD Special Seismic Certification Pre-approval: OSP-0016-10

  • ABS Type Certified


  • Main Lugs 100–600 A

  • Main Circuit Breaker 100–600 A

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