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 Tables PowerPact Interrupting Ratings and Common Catalog Numbering System and Supplemental Digest Section 3.

PowerPacT L Main Circuit Breaker Cabinet Height (inches)[5]

Max. No. of Branch Spaces
(Does not include sub-feed circuit breaker spaces)
NEMA 1 Enclosure
(20 in. W x 8.75 in. D)[6]
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 circuit breakers per 400–600 A panelboard.

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

Sub-feed Circuit Breaker (see PowerPacT Interrupting Ratings, and Common Catalog Numbering System, in Section 7)

Panelboard Mains Rating

Sub Feed Breaker

Space Factor (in.)[7]

No. of Poles

Ampacity

MCCB Frame

225 A 2 70–225 QB, QD, QG, QJ 18
3
2 110–150 HD, HG, HJ, HL, HR 18
3
2 150–225 JD, JG, JJ, JL, JR 18
3
400 A, 600 A 2 70–225 QB, QD, QG, QJ 24
3
2 110–150 HD, HG, HJ, HL, HR 24
3
2 150–225 JD, JG, JJ, JL, JR 24
3
400 A 3 126–600 LG, LJ, LL 18
600 A

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)

Max. No. of Branch Spaces
(Does not include
sub-feed
circuit breaker spaces)

Standard Depth Enclosures(20 in. W x 5.75 in. D)

225 A

250 A

400 A

600 A

Main
Lugs

Main Circuit Breaker

Main
Lugs[8]

LA / LH Main Circuit Breaker

Main
Lugs[8]

30

50

62

74

86

74

42

56

68

74

86

80

54

62

74

80

92

80

72

68

80

86

86

84

74

86

92

92

PowerPacT LG, LJ, or LL Sub-feed Circuit Breaker Cabinet Height (inches)[5]

Max. No. of Branch Spaces (Does not include sub-feed circuit breaker spaces) NEMA 1 D9 Enclosure
(20"W x 8.75" D)[9]
Vented NEMA 3R Enclosure Height
(26 in. W x 8.75 in. D)
Main Lugs Main Circuit Breaker Main Lugs Main Circuit Breaker
LA / LH MB PP-L MB 400 A / 600 A LA / LH 400A PP-L 600A PP-L
30 68 80 80 74 80 80 86
42 68 80 86 74 80 86 92
54 74 86 92 80 86 92
72 80 92 86 92
84 86 92

Footnotes

  1. Factory Assembled Interiors are rated for trip current of Main Breaker / Switch.
  2. Three Phase only.
  3. Copper only.
  4. Deep Box required for PowerPacT L Main Circuit Breaker or Switch.
  5. Feed-thru lugs and compression lugs available factory assembled only. These add 6 - 12 inches to enclosure length.
  6. D9 8.75" deep enclosures are required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker.
  7. Space Factor - add this length to enclosure when adding a Sub Feed Breaker.
  8. Bottom feed only in NEMA 3R enclosures.
  9. D9 8.75" deep enclosures are required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker. See Main Circuit Breaker Interiors.

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