Square D Digest 179

Panelboards

Final Distribution Panelboard Series Ratings

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Refer to NQ Panelboards Table 9.1 NQ Series Connected Circuit Breaker Ratings (RMS Symmetrical) (cont'd.) Maximum System VoltageAC [9] Maximum Short Circuit Current Rating [10] Square D™ Brand Integral or Remote Main Circuit Breakers and Remote Main Fuses [11][12][13]

Square D™ Brand Branch Circuit Breaker Catalog Designation and Allowable Ampere Ranges Type [14][15][16] 1Pole 2Pole 3Pole

QO(B)

15–70A 15–30A 15–30A 15–20A 15–20A 15–20A 15–70A 15–30A 15–30A 15–30A 15–20A 15–20A 15–20A 15–70A — 15–20A 15–20A 15–20A 15–70A 15–30A 15–30A 15–30A 15–20A 15–20A 15–20A 15–70A 15–30A 15–30A 15–20A 15–20A 15–20A — — — —

15–125A 15–60A 15–60A

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —

QO(B)GFI QO(B) EPD QO(B)AFI QO(B)CAFI

EJ

—

15–20A

QO(B)DF

—

QO(B)

15–125A

QOB-VH QO(B) PL QO(B)GFI QO(B) EPD QO(B)AFI QO(B)CAFI QOB-VH QO(B)GFI QO(B) EPD QO(B)AFI QO(B)CAFI QOB-VH QO(B) PL QO(B)GFI QO(B) EPD QO(B)AFI QO(B)CAFI QO(B)DF QO(B) QO(B)DF QO(B) QO(B)DF QO(B)H QO(B)H QO(B)H QO(B)H QO(B)GFI QO(B)GFI QO(B)GFI QO(B)GFI QO(B)GFI QOB-VH QO(B) PL QO(B)GFI QO(B) EPD QO(B) EPE QO(B)GFI QDL QO(B) QO(B) QO(B) VH QO(B)DF QO(B) QO(B)GFI QO(B) EPD QO(B)AFI QO(B)CAFI

150A

15–60A 15–60A 15–60A

BJ,HJ, JJ

—

15–20A

—

15–125A

150A

15–60A 15–60A

9 PANELBOARDS

LJ

—

15–20A

—

15–125A

150A

15–60A 15–60A 15–60A

125,000

HL, JL

—

15–20A

—

15–125A 15–60A 15–60A

200,000

HR, JR

—

15–20A

—

25,000 42,000 65,000 100,000 125,000 18,000 22,000

QD, BD, HD, JD, LD

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —

15–100A 70–225A 15–100A 15–100A 15–100A

LA

QG, BG, HG, JG, LG

2401P/2W

BJ, HJ, JJ, LJ

HL, JL LA/LH

— — — — — — — — — — — — — — — — — — — — — — — — — — — — —

15–30A 15–50A 15–50A 15–30A 15–50A 15–30A 15–30A 15–100A 110–150A 15–30A 15–50A 15–50A 15–50A 15–50A 15–100A 15–50A 15–50A 15–30A 15–100A 110–150A 15–30A 15–50A 15–50A 15–100A 15–50A 15–50A 15–100A 110–150A

QO (B) VH, QOB-VH QD, ED, BD, HD, JD

25,000

LD

QG, EG, BG, HG, JG

65,000

LG

208Y/120 3P/4W

QJ

100,000

EJ, BJ, HJ, JJ

QO(B)

QO(B) VH

QO(B) EPD QO(B) EPE

22,000

QO(B)

QO(B) VH QOB-VH QO(B) PL QO(B) EPD QO(B) EPE

QD

240/120 3P/4W 2403P/3W

25,000

QO(B)

QO(B) EPD QO(B) EPE

ED

QO(B)

QO(B) VH QO(B) PL

BD,HD, JD

15–30A

[9] Series Ratings listed at higher system voltages apply to lower system voltages (Example: 240 3P/3W covers 208Y/120 3P/4W). [10] Short Circuit tests are conducted at 100–105% of the maximum rated voltage of the panelboard. [11] Please consult the NQ/NQM Panelboards Information Manual (80043-712-06) for additional information, including series ratings with obsolete circuit breakers. [12] Where LG is shown, LJ and LL can be used.

[13] Unless otherwise noted, main breakers can be applied at the maximum available amperage rating. [14] Suffixes HID, SWD, and SWN may also be applied to the applicable branch circuit breakers shown above. [15] Where QO(B) circuit breakers are shown above, QO(B)H, QO(B)VH, and QH(B) circuit breakers may also be used. [16] Two-pole CAFI circuit breakers cannot be used on 208Y/120V systems.

9-3

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