Section 9: Panelboards PDF

Section 9: Panelboards PDF

< Previous
Next >

NQ Factory Assembled Panelboards

NQ Main and Sub-feed Circuit Breakers

Factory Assembled Main Circuit Breakers

400 A and 600 A panelboards, 1Ø or 3Ø

NQ Panelboard Factory Assembled Interiors - 240 Vac / 48 Vdc Max

Single Phase or Three Phase
Mains Rating (Amps) Max. Number of One-Pole Circuit Breakers Bus Material Min. Box Depth
Main Lugs Only Main
Circuit Breaker[1]		 Main Switch[1] Main Lugs Only Main
Circuit Breaker / Switch
100 Max 15–100 70–100 18, 30 Al, Cu 5.75 in. 5.75 in.
225 Max 15–250 110–250 30, 42, 54, 72, 84 Al, Cu 5.75 in. 5.75 in.
400 Max 125–400 300–400 30, 42, 54, 72[2], 84[3] Al, Cu 5.75 in. 5.75 in. / 8.75 in.[4]
600 Max 125–600 450–600 30, 42, 54, 72[2], 84 Cu 5.75 in. 8.75 in.[4]

Main Circuit Breaker (PowerPacT L-frame - see PowerPacT Interrupting Ratings, and Common Catalog Numbering System, in Section 7)

Number of Poles Trip Unit Options Frame Sizes Ampacity
3 LI, LSI, Switch LG, LJ, LL 125–600 A

LA/LH PowerPacT H, J, and Q-frame circuit breakers are also available - see PowerPacT Interrupting Ratings and Common Catalog Numbering System and Supplemental Digest Section 3.

PowerPacT L Main Circuit Breaker Cabinet Height (inches)

Max. No. of Branch Spaces
(Does not include sub-feed circuit breaker spaces) 		NEMA 1 Enclosure
(20 in. W x 8.75 in. D)[4]		 Vented NEMA 3R Enclosure
(26 in. W x 8.75 in. D)[5]
400 or 600 A 400 A 600 A
30 62 62 68
42 68 68 74
54 74 74 80
72 80 – –
84 86 – –

Sub-feed Circuit Breakers

Main lugs or main circuit breaker interior—1Ø or 3Ø.
Maximum 1 circuit breaker per 225 A main lug or 250 A main circuit breaker panelboard, 2 PowerPacT H-, J-, or Q-frame sub-feed circuit breakers may be installed on a

400–600 A panelboard.

Panelboards in MHxxWP NEMA Type 3R/5/12 enclosures are limited to one 150 A maximum sub-feed breaker.

  • Panelboards in vented MHxxD9VWP NEMA 3R enclosures may have two 225 A maximum sub-feed circuit breakers. A single 600 A maximum sub-feed circuit breaker may be factory installed in these new enclosures.

Sub-feed Circuit Breakers for NQ Panelboards[6]

Interior Rating

Sub Feed Circuit Breakers[6]

Space Factor

Ampacity

Poles

MCCB Frame
225 A 70–225 2 or 3 QB, QD, QG, QJ 18 in.
110–150 2 or 3 HD, HG, HJ, HL, HR[7]
150–225 2 or 3 JD, JG, JJ, JL, JR[8]
400 A / 600 A 70–225 2 or 3 QB, QD, QG, QJ[9] 24 in.
110–150 2 or 3 HD, HG, HJ, HL, HR[7], [9]
150–225 2 or 3 JD, JG, JJ, JL, JR[8], [9]
125–400 2 or 3 LA / LH 18 in.[10]
125–600 3 LG, LJ, LL 18 in.[11]

PowerPacT H, J, & L frame circuit breakers are also available - see Tables PowerPacT Interrupting Ratings, and Common Catalog Numbering System, Section 7.

PowerPacT H, J, or Q-frame Sub-feed Circuit Breaker Cabinet Height (inches)[12]

Max. No. of Branch Circuit Spaces (not including sub-feed circuit breaker)

Mains Type and Maximum Current Rating

225 A Main Lugs[13]

250 A Main Circuit Breaker[14]

400 / 600 A Main Lugs[15]

400 A LA/LH Main Circuit Breaker[16]

400 / 600 A LG/LJ/LL Main Circuit Breaker[17]

30

50

62

74

86

86

42

56

68

74

86

86

54

62

74

80

92

–

72

68

80

86

–

–

84

74

86

92

–

–

PowerPacT LG, LJ, or LL Sub-feed Circuit Breaker Cabinet Height (inches)[18]

Max. No. of Branch Spaces (Does not include sub-feed circuit breaker spaces) NEMA 1 D9 Enclosure
(8.75-in. D)[19]		 Vented NEMA 3R Enclosure Height
(26-in. W x 8.75-in. D)
20-in. Wide 26-in. Wide Main Lugs Main Circuit Breaker[19]
Main Lugs LA / LH Main Circuit Breaker LG / LJ / LL[19]
Main Breaker LA / LH 400A PP-L 600A PP-L
30 68 80 80 74 74 86 92
42 68 80 86 74 80 86 92
54 74 86 92 80 86 92 —
72 80 92 — — — — —
84 86 — — — — — —

NQ MLO Panelboard in Vented NEMA 3R enclosure
with 600 A Sub-Feed Circuit Breaker

Weather and Dust Resistant Enclosures—Type 3R, 4, 4X, 5, 12

Weatherproof or Dusttight Cabinets

note

NQ panelboards with PowerPacT L circuit breakers are not available with a NEMA Type 4, 4X, 5, or 12 enclosure. (Use I-Line).

NQ panelboards with PowerPacT L circuit breakers are available with vented 26 in. wide NEMA 3R enclosures. These vented NEMA 3R enclosures also enable selection of subfeed circuit breakers up to 600 A.

400 A maximum NQ panelboards in NEMA 4, 4X, 5, or 12 enclosures are available with one subfeed breaker up to 150 A.

Footnotes

  1. Factory Assembled Interiors are rated for trip current of Main Breaker / Switch.
  2. Three Phase only.
  3. Copper only.
  4. D9 8.75 in. deep enclosures are required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker. Reference PBA713x drawing for more dimensional information, where x may be A, HR, HRT, or T depending upon the choice of options and enclosure.
  5. Feed-thru lugs and compression lugs available factory assembled only. These add 6 - 12 inches to enclosure length. Please reference PBA755 or PBA755T for more complete dimensional information, where x may be A, HR, HRT, or T depending upon the choice of options and enclosure.
  6. See Digest Section 7 for Interrupting Ratings and Catalog Numbers of PowerPacT H-, J-, L-, Q- and LA/LH frame MCCBs.
  7. Three pole HD, HG, HR MCCBs are installed for single phase sub-feed circuit breaker applications.
  8. Three pole JR MCCBs are installed for single phase sub-feed circuit breaker applications.
  9. One or two sub-feed circuit breakers may be selected.
  10. NQ Panelboards with LA or LH sub-feed circuit breaker and LG, LJ, or LL main circuit breaker are supplied with 26 in. wide, 8.75 in. deep enclosures and have Condo Riser neutral assemblies.
  11. Space Factor for LG, LJ, or LL is 24 in. when it is installed onto a main circuit breaker panelboard or a main lugs panelboard with a Condo Riser neutral assembly. These panelboards are supplied with 26 in. wide, 8.75 in. deep enclosures and have Condo Riser neutral assemblies.
  12. Bottom feed only in NEMA Type 3R enclosures. NEMA 3R applications with sub-feed circuit breakers greater than 150A require 8.75 in. deep, 26 in. wide enclosure - reference PBA603WP.
  13. Reference PBA701x drawing for more dimensional information. PBA701x - x may be A, E, HR, HRT, or T, depending upon choice of options and trim front.
  14. Reference PBA707x drawing for more dimensional information. PBA707x - x may be A, E, HR, HRT, or T, depending upon choice of options and trim front.
  15. Reference PBA709x drawing for more dimensional information. Bottom feed only in NEMA Type 3R enclosures. NEMA 3R applications with sub-feed circuit breakers greater than 150A require 8.75 in. deep, 26 in. wide enclosure - reference PBA603WP. PBA709x - x may be A, E, HR, HRT, or T, depending upon choice of options and trim front.
  16. Reference PBA710x drawing for more dimensional information. Bottom feed only in NEMA Type 3R enclosures. NEMA 3R applications with sub-feed circuit breakers greater than 150 A require 8.75 in. deep, 26 in. wide enclosure - reference PBA603WP. PBA710x - x may be A, E, HR, HRT, or T depending upon choices of options and trim front.
  17. LG, LJ, or LL Main Circuit Breaker requires D9 8.75 in. enclosure. Reference PBA713x or PBA755x drawing for more dimensional information. PBA###x - x may be A, E, HR, HRT, or T, depending upon choice of options and enclosure.
  18. Feed-thru lugs and compression lugs available factory assembled only. These add 6 - 12 inches to enclosure length.
  19. NQ Panelboards with PowerPacT L Main Circuit Breaker and PowerPacT L Sub-Feed Circuit Breaker are supplied with Condo Riser Neutral Assemblies, and require 26 in. wide, 8.75 in. deep enclosures.
< Previous
Next >

Was this helpful?