Section 9: Panelboards PDF

Section 9: Panelboards PDF

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NQ and NF Panelboards Technical Specifications and Series Ratings

Find UL-listed series rated combinations for Square D® NQ and NF Series panelboards. View approved main and branch circuit breakers pairings, system voltages, and short-circuit current ratings.

NQ Panelboards

The following table provides UL tested and certified series combination ratings for Square D™ NQ Panelboards operating at up to 240 Vac and 48 Vdc. These ratings list which Square D QO and QOB branch circuit breakers, including AFCI, CAFI, GFCI, EPD, and Powerlink types, are approved for use at fault current levels beyond their individual interrupting ratings when paired with a qualified upstream main. Ratings apply to integral mains housed within the same enclosure and remote mains located in a separate enclosure. Short circuit tests are conducted at 100–105% of the maximum rated panelboard voltage per UL 67. Refer to NQ Panelboards online.

NQ Series Connected Circuit Breaker Ratings (RMS Symmetrical)

Maximum System Voltage AC [1]

Maximum Short Circuit Current Rating[2]

Square D™ Brand Integral or Remote Main Circuit Breakers and Remote Main Fuses[3][4][5]

Square D™ Brand Branch Circuit Breaker Catalog Designation and
Allowable Ampere Ranges 

Type[6][7][8]

1 Pole

2 Pole

3 Pole

120/240 Single-phase/Three-wire


208Y/120 Three-phase/Four-wire


240/120 Three-phase/Four-wire

18,000

LA / LH

QO (B)/QO (B) VH

15–30 A

15–30 A

—

22,000

QO (B) VH, QOB-VH

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

25,000

QD

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QOB-VH

—

150 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

ED

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

BD, BG, BJ

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

HD, HG, HJ, HL, JD, JG, JJ, JL, LD, LG, LJ, LL

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

—

15–60 A

—

QO (B) EPD

—

15–60 A

—

QO (B) CAFI

—

15–20 A

—

HD, HG, HJ, HL

QOB-VH

—

150 A

—

HD, HG, HJ, HL, JD, JG, JJ, JL

QO (B) PL

15–30 A

15–60 A

—

42,000

LA

QO (B)/QO (B) VH

15–30 A

15–30 A

—

65,000

QG

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QOB-VH

—

150 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

EG

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) EPE

—

—

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

BG, BJ

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

HG, HJ, HL, JG, JJ, JL, LG, LJ, LL

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

—

15–60 A

—

QO (B) EPD

—

15–60 A

—

QO (B) CAFI

—

15–20 A

—

HG, HJ, HL

QOB-VH

—

150 A

—

100,000

QJ

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QOB-VH

—

150 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

EJ

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

BJ

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

HJ, HL, JJ, JL

QO (B)/QO (B) VH

15–70 A

15–125 A

  

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

—

15–60 A

—

QO (B) EPD

—

15–60 A

—

QO (B) CAFI

—

15–20 A

—

HJ, HL

QOB-VH

—

150 A

  

LJ, LL

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

—

15–60 A

—

QO (B) EPD

—

15–60 A

—

QO (B) CAFI

—

15–20 A

—

QO (B) PL

15–30 A

—

—

125,000

HL, JL

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QOB-VH

—

150 A

—

QO (B) PL

15–30 A

15–60 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

200,000

HR, JR

QO (B)/QO (B) VH

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

240 Single-phase/Two-wire

25,000

QD, BD, BG, BJ, HD, HG, HJ, HL, JD, JG, JJ, JL

QO (B) H

—

15–100 A

—

42,000

LA, MA

QDL

—

70–225 A

—

65,000

QG, BG, BJ, HG, HJ, HL, JG, JJ, JL, LG, LJ, LL

QO (B) H

—

15–100 A

—

100,000

BJ, HJ, HL, JJ, JL, LJ, LL

QO (B) H

—

15–100 A

—

125,000

HL, JL

QO (B) H

—

15–100 A

—

208Y/120 Three-phase/Four-wire

18,000

LA/LH, MC

QO (B)/QO (B) VH

—

—

15–30 A
22,000 QO (B) VH, QOB-VH QO (B) GFI

—

—

 15–50 A

25,000

QD, ED, BG, BJ, HD, HG, HJ, HL, JD, JG, JJ, JL

QO (B) GFI

—

—

15–50 A

LD, LG, LJ, LL

QO (B) GFI

—

—

15–30 A

JD, JG, JJ, JL

QOB- VH

—

—

 15–150 A

65,000

QG, EG, HG, HJ, HL, JG, JJ, JL

QO (B) GFI

—

—

15–50 A

BG, BJ, LG, LJ, LL

QO (B) GFI

—

—

15–30 A

JG, JJ, JL

QOB- VH

—

—

 15–150 A

100,000

QJ

QO (B)/QO (B) VH

—

—

15–30 A

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

QO (B) GFI

—

—

15–50 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

EJ, HJ, HL, JJ, JL

QO (B) GFI

—

—

15–50 A

125,000

HJ, HL, JL, LL

QO (B) GFI

—

—

15–50 A

240/120 Three-phase/Four-wire


240 Three-phase/Three-wire

22,000

QOB-VH

QO (B)/QO (B) VH

—

—

15–100 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

25,000

QD

QO (B)/QO (B) VH

—

—

15–30 A

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

ED

QO (B)/QO (B) VH

—

—

15–100 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

BD, BG, BJ

QOB-VH

—

—

15–150 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

HD, HG, HJ, HL, JD, JG, JJ, JL

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

LD, LG, LJ, LL

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) EPD

—

—

15–30 A

QO (B) EPE

—

—

15–30 A

42,000

LA, MA

QO (B) VH

—

—

15–30 A

MG

QOB-VH

—

—

110-150A

65,000

QG

QO (B)/QO (B) VH

—

—

15–30 A

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

EG

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–125 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

BG, BJ

QOB-VH

—

—

35–150 A

HG, HJ, HL, JG, JJ, JL

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

LG, LJ, LL

QO (B)

—

—

15–30 A

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) EPD

—

—

15–30 A

QO (B) EPE

—

—

15–30 A

100,000

FC, KC

QO (B)/QO (B) VH

—

—

15–100 A

EJ

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–125 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

BJ

QOB-VH

—

—

15–150 A

HJ, HL, JJ, JL

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

QO (B) PL

—

—

15–30 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

LJ, LL

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110-150A

125,000

JL

QOB-VH

—

—

110-150A

HL, JL

QO (B)/QO (B) VH

—

—

15–100 A

QO (B) PL

—

—

15–30 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

200,000

HR, JR

QO (B)/QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110-150A

120/240 Single-phase/Three-wire


208Y/120 Three-phase/Four-wire


240/120 Three-phase/Four-wire

42,000

400 A Max. Class T3 Fuses

QO (B) VH

15–70 A

15–125 A

—

65,000

400 A Max. Class J Fuses

QO (B) VH

15–70 A

15–125 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

400 A Max. Class T6 Fuses

QO (B) VH

15–70 A

15–125 A

—

QOB-VH

—

150 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

100,000

200 A Max. Class T3 Fuses

QO (B)

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

QO (B) AFI

15–20 A

—

—

QO (B) CAFI

15–20 A

15–20 A

—

QO (B) DF

15–20 A

—

—

200,000

200 A Max. Class T6 or J Fuses

QO (B)

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

400 A Max. Class T3 Fuses

QO (B)

15–70 A

15–125 A

—

QO (B) GFI

15–30 A

15–60 A

—

QO (B) EPD

15–30 A

15–60 A

—

208Y/120 Three-phase/Four-wire

65,000

400 A Max Class J

QO (B) GFI

—

—

15–50 A

100,000

200 A Max Class T3

QO (B) GFI

—

—

15–50 A

200,000

200 A Max. Class T6 or J Fuses

QO (B) GFI

—

—

15–50 A

400 A Max. Class T3 Fuses

QO (B) GFI

—

—

15–50 A

240/120 Three-phase/Four-wire


240 Three-phase/Three-wire

50,000

600 A Max. Class T3 Fuses

QO (B) VH

—

—

15–30 A

65,000

400 A Max. Class J Fuses

QO (B) VH

—

—

15–100 A

400 A Max. Class T6 Fuses

QO (B) VH

—

—

15–100 A

QOB-VH

—

—

110–150 A

100,000

200 A Max. Class T3 Fuses

QO (B)

—

—

15–100 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

200,000

200 A Max. Class T6 or J Fuses

QO (B)

—

—

15–100 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

400 A Max. Class T3 Fuses

QO (B)

—

—

15–100 A

QO (B) EPD

—

—

15–50 A

QO (B) EPE

—

—

15–50 A

NF Panelboards

The following table provides UL tested and certified series combination ratings for Square D™ NF Panelboards, rated for system voltages up to 600Y/347 Vac. These ratings identify approved combinations of Square D EDB, EGB, EJB, and ECB-G3 branch circuit breakers, including EPD variants for 480Y/277 Vac applications, with qualified integral or remote upstream mains and fused disconnects. Series ratings apply to both single- and three-phase configurations across 120 V through 600Y/347 V systems. Short circuit tests are conducted at 100–105% of the maximum rated panelboard voltage per UL 67. Refer to NF Panelboards online.

NF Series Connected Circuit Breaker Ratings (RMS Symmetrical)

Maximum System

Voltage, AC [9]

Max. Short Circuit
Current Rating

Square D™ Brand Integral or Remote
Main Circuit Breakers and Remote Main Fuses[10]

Square D™ Brand Branch Circuit Breaker Catalog
Designation and Allowable Ampere Ranges

Circuit Breaker Abbreviation[11]

1 Pole

2 Pole

3 Pole

120

120/240

240

65,000

EG, BG, BJ, HG, HJ, HL, JG, JJ, JL, LG, LJ, LL, LH

EDB

15–70

15–125

15–125

EG

ECB-G3

15–30

15–30

15–30

100,000

EJ, BJ, HJ, HL, JJ, JL, LJ, LL

EDB, EGB

15–70

15–125

15–125

EJ, BJ, HJ, HL, JJ, JL

ECB-G3

15–30

15–30

15–30

125,000

HL, JL

EDB, EGB, EJB

15–70

15–125

15–125

HL, JL

ECB-G3

15–30

15–30

15–30

200,000

HR, JR, LR

EDB, EGB, EJB

15–70

15–125

15–125

HR, JR

ECB-G3

15–30

15–30

15–30

Class J or T (600 V) 200 A Max Fuses

ECB-G3

15–30

15–30

15–30

277
480Y/277

35,000

EG, BG, BJ, HG, HJ, HL, JG, JJ, JL, LG, LJ, LL, LH

EDB

15–70

15–125

15–125

EG, BG, BJ, HG, HJ, HL, JG, JJ, JL, LG, LJ, LL, LH

EDB-EPD

15–50

—

—

EG, BG, BJ, HG, HJ, HL, JG, JJ, JL

ECB-G3

15–30

15–30

15–20

65,000

EJ, BJ, HJ, HL, JJ, JL, LJ, LL

EDB, EPD

15–70

15–125

15–125

EJ, BJ, HJ, HL, JJ, JL, LJ, LL

EDB-EPD, EGB-EPD

15–50

—

—

EJ, BJ, HJ, HL, JJ, JL

ECB-G3

15–30

15–30

15–20

100,000

HL, JL, LL

EDB, EGB, EJB

15–70

15–125

15–125

HL, JL, LL

EDB-EPD, EGB-EPD, EJB-EPD

15–50

—

—

Class J or T (600 V) 400 A Max Fuses

EDB, EGB, EJB

15–70

15–125

15–125

Class J or T (600 V) 400 A Max Fuses

EDB-EPD, EGB-EPD, EJB-EPD

15–50

—

—

200,000

HR, JR, LR

EDB, EGB, EJB

15–70

15–125

15–125

HR, JR, LR

EDB-EPD, EGB-EPD, EJB-EPD

15–50

—

—

HR, JR

ECB-G3

15–30

15–30

15–20

Class J or T (600 V) 200 A Max Fuses

EDB, EGB, EJB

15–70

15–125

15–125

Class J or T (600 V) 200 A Max Fuses

EDB-EPD, EGB-EPD, EJB-EPD

15–50

—

—

Class J or T (600 V) 200 A Max Fuses

ECB-G3

15–30

15–30

15–20

347
600Y/347

18,000

HG, HJ, HL, BG, BJ, JG, JJ, JL, LG, LJ, LL

EDB

15–70

15–100

15–100

25,000

EJ, BJ, HJ, HL, JJ, JL, LJ, LL, LH

EDB, EGB

15–70

15–100

15–100

50,000

HL, JL, LL

EDB, EGB, EJB

15–70

15–100

15–100

65,000

HR, JR

EDB, EGB, EJB

15–70

15–100

15–100

LR

EJB

15–70

15–100

15–100

200,000

Class J or T (600 V) 200 A Max Fuses

EDB, EGB, EJB

15–70

15–100

15–100

Footnotes

  1. Series Ratings listed at higher system voltages apply to lower system voltages (Example: 240 3P/3W covers 208Y/120 3P/4W).
  2. Short Circuit tests are conducted at 100–105% of the maximum rated voltage of the panelboard.
  3. Refer to document number 80043-712-06, NQ/NQM Panelboards, for additional information, including series ratings with obsolete circuit breakers.
  4. Where LG is shown, LJ and LL can be used.
  5. Unless otherwise noted, main breakers can be applied at the maximum available amperage rating.
  6. Suffixes HID, SWD, and SWN may also be applied to the applicable branch circuit breakers shown above.
  7. Where QO(B) circuit breakers are shown above, QO(B)H, QO(B)VH, and QH(B) circuit breakers may also be used.
  8. Two-pole CAFI circuit breakers cannot be used on 208Y/120V systems.
  9. Short circuit tests are conducted at 100–105% of the maximum rated voltage of the panelboard.
  10. Please consult the NF/NFOM Panelboards Information Manual (80043-741-03) for additional information, including series ratings with obsolete circuit breakers.
  11. EDB-EPD, EGB-EPD & EJB-EPD suitable for 480Y/277Vac or 277Vac ONLY.
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