SE Digest 178
Panelboards
Panelboard Series Ratings
Refer to NQ Panelboards
www.se.com/us
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) VH QO(B) VH QO(B) VH
50,000
600 A Max. Class T3 Fuses 400 A Max. Class J Fuses
— — — — — — — — — — — — —
— — — — — — — — — — — — —
15–30A 15–100A 15–100A 110–150A 15–100A 15–50A 15–50A 15–100A 15–50A 15–50A 15–100A 15–50A 15–50A
65,000
400 A Max. Class T6 Fuses
QOB-VH QO(B)
QO(B) EPD QO(B) EPE
100,000
200 A Max. Class T3 Fuses
240/120 3P/4W 2403P/3W
QO(B)
QO(B) EPD QO(B) EPE
200 A Max. Class T6 or J Fuses
200,000
QO(B)
QO(B) EPD QO(B) EPE
400 A Max. Class T3 Fuses
NF Panelboards This page contains UL Tested and Certified series combination ratings for panelboards. These ratings apply to either an integral main located in the same enclosure or a remote main located in a separate enclosure.
9 PANELBOARDS
Table 9.2: NF Series Connected Circuit Breaker Ratings (RMS Symmetrical) Maximum System Voltage, AC [17] Max. Short Circuit Current Rating Square D™ Brand Integral or Remote Main Circuit Breakers and Remote MainFuses [18]
Square D™ Brand Branch Circuit Breaker Catalog Designation and Allowable Ampere Ranges
Circuit Breaker Abbreviation [19]
1Pole 15–70 15–30 15–70 15–30 15–70 15–30 15–70 15–30 15–30 15–70 15–50 15–30 15–70 15–50 15–30 15–70 15–50 15–70 15–50 15–70 15–50 15–30 15–70 15–50 15–30 15–70 15–70 15–70 15–70 15–70 15–70
2Pole 15–125 15–30 15–125 15–30 15–125 15–30 15–125 15–30 15–30 15–125
3Pole 15–125 15–30 15–125 15–30 15–125 15–30 15–125 15–30 15–30 15–125
EG, BG, HG, JG, LG, LH
EDB
65,000
EG
ECB-G3 EDB, EGB
EJ, BJ, HJ, JJ, LJ
100,000
EJ, BJ, HJ, JJ
ECB-G3
120 120/240 240
HL, JL HL, JL
EDB, EGB, EJB
125,000
ECB-G3
HR, JR, LR
EDB, EGB, EJB
HR, JR
200,000
ECB-G3 ECB-G3
Class J or T (600 V) 200 A Max Fuses
EG, BG, HG, JG, LG, LH EG, BG, HG, JG, LG, LH
EDB
35,000
EDB-EPD ECB-G3 EDB, EPD
—
—
EG, BG, HG, JG EJ, BJ, HJ, JJ, LJ
15–30 15–125
15–20 15–125
EJ, BJ, HJ, JJ, LJ, LL
EDB-EPD, EGB-EPD
65,000
—
—
EJ, BJ, HJ, JJ
ECB-G3
15–30 15–125
15–20 15–125
HL, JL, LL HL, JL, LL
EDB, EGB, EJB
EDB-EPD, EGB-EPD, EJB-EPD
—
—
277 480Y/277
100,000
Class J or T (600 V) 400 A Max Fuses Class J or T (600 V) 400 A Max Fuses
EDB, EGB, EJB
15–125
15–125
EDB-EPD, EGB-EPD, EJB-EPD
—
—
HR, JR, LR HR, JR, LR
EDB, EGB, EJB
15–125
15–125
EDB-EPD, EGB-EPD, EJB-EPD
—
—
HR, JR
ECB-G3
15–30 15–125
15–20 15–125
200,000
Class J or T (600 V) 200 A Max Fuses Class J or T (600 V) 200 A Max Fuses Class J or T (600 V) 200 A Max Fuses
EDB, EGB, EJB
EDB-EPD, EGB-EPD, EJB-EPD
—
—
ECB-G3
15–30 15–100 15–100 15–100 15–100 15–100 15–100
15–20 15–100 15–100 15–100 15–100 15–100 15–100
18,000 25,000 50,000 65,000 200,000
HG, BG, JG, LG
EDB
EJ, BJ, HJ, JJ, LJ, LH
EDB, EGB
HL, JL, LL
EDB, EGB, EJB EDB, EGB, EJB
347 600Y/347
HR, JR
LR
EJB
Class J or T (600 V) 200 A Max Fuses
EDB, EGB, EJB
[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. [17] Short circuit tests are conducted at 100–105% of the maximum rated voltage of the panelboard. [18] Please consult the NF/NFOM Panelboards Information Manual (80043-741-03) for additional information, including series ratings with obsolete circuit breakers. [19] EDB-EPD, EGB-EPD & EJB-EPD suitable for 480Y/277Vac or 277Vac ONLY.
9-5
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