SE Digest 178

NF Panelboards—600Y/347 Vac Max.

NF Factory Assembled Main Circuit Breakers

Refer to NF Panelboards

www.se.com/us

Factory Assembled Main Circuit Breakers (600Y/347 Vac maximum) Table 9.55: NF Panelboard Factory Assembled Interiors—600Y/347 Vac Max Single Phase 3-Wire (1P/3W), or Three Phase 4-Wire (3P/4W) [40] Mains Rating (Amps) Max. Number of One-Pole Circuit Breakers Bus Material Min. Box Depth (inches) MainLugs Only Circuit Breaker Frame Main Breaker [41] Main Switch [41] Main Lugs Only

Main Breaker / Switch

9 PANELBOARDS

ED, EG, EJ [42]

18, 30

Al, Cu 5.75 in.

125Max

15–125

–

5.75 in.

18, 30, 42 [43] , 54 [43] 30, 42, 54, 66 [44] 30, 42, 54, 66 [44] , 84

Al, Cu 5.75 in.

125 Max HD/HG/HJ/HL/ HR 250 Max JD/JG/JJ/JL/ JR

15–125

110–125

5.75 in.

Al, Cu 5.75 in.

150–250 150–250

5.75 in.

8.75 in. or 5.75 in. [45]

Al, Cu 5.75 in.

400 Max LG/LJ/LL/LR & LA/LH

125–400 300–400

8.75 in. [45] 8.75 in. [47]

600 Max LG/LJ/LL/LR 400–600 450–600 30, 42, 54, 66, 84

Cu

5.75 in. 8.75 in. [46]

MG

600–800

—

30, 42, 54

800Max

Cu

PG, PJ, PL 600–800 600–800 NOTE: Factory Assembled Main Circuit Breakers (600Y/347 Vac maximum). 600Y/ 347 Vac applications require use of ExBx6xxx branch circuit breakers, i.e. EDB16015 for a 1P, 15A circuit. [48] 400 A and 600 A panelboards, 1Ø or 3Ø PowerPacT L-frame - see Tables in Section 7. Table 9.56: Main Circuit Breaker No. of Poles Trip Unit Options Frame Sizes Ampacity 3 LI, LSI, Switch LG, LJ, LL, LR 125–600A LA/LH, PowerPacT H and J-frame circuit breakers are also available—see Tables in Section 7 and Supplemental Digest Section 3. Table 9.57: PowerPacT L Main Circuit Breaker Cabinet Height (inches)

NEMA 1 Enclosure (20 in. W x 8.75 in. D) [49]

Vented NEMA 3R Enclosure (26 in. W x 8.75 in. D) [50]

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

400 / 600 A Interior

400A

600A

30 42 54 66

68 74 80 92

68 74 80

74 80 86

– – Table 9.58: NF Sub-Feed Circuit Breakers (available on 1Ø or 3Ø, 250 A–800 A main lugs or 250 A–600 A main circuit breaker interiors)

Sub Feed Breaker

No.Of Sub Feed Breakers Available to Install

Interior Mains Rating

Space Factor [51] (in.)

No. of Poles

MainsType

Ampaci ty

Sub-Feed Circuit Breaker Frame

110 - 150 HD, HG, HJ, HL, HR

250 A Main Lugs or Main Breaker

18

1

150 - 250

JD, JG, JJ, JL, JR

Main Lugs or LA / LH Main Breaker

18

110 - 150 HD, HG, HJ, HL, HR

PowerPacT L Main Breaker

12

1or 2

Main Lugs or LA / LH Main Breaker

18

2or 3

150 - 250

JD, JG, JJ, JL, JR

PowerPacT L Main Breaker

12

400A / 600A / 800A

Main Lugs or LA / LH Main Breaker

18

300 - 400

LA, LH

1

PowerPacT L Main Breaker

12

LA or LH with PowerPacT H or J LG, LJ, LL, LR [52]

1LAor LH and1Hor J

Main Breaker or Main Lugs

36

125 - 600

Main Lugs or Main Breaker

18

3

1

[40] NF panelboards without neutral connections may be applied in 3-phase, 4-wire grounded Wye systems, except at the Service Entrance. [41] Factory Assembled Interiors are rated for trip current of Main Breaker / Switch. [42] Back-Fed Main Breaker applications only. [43] Three Phase Copper only. [44] Three Phase only. [45] 8.75" Deep Box required for PowerPacT L Main Breaker or Switch. [46] Enclosures limited to NEMA Type 1 only. [47] 8.75" Enclosures limited to 26" Wide NEMA Type 1. [48] Requires use of ExBx6xxx branch circuit breakers, i.e. EDB16015 for a 1P, 15A circuit. [49] D9 8.75" deep enclosure and three point latch door is required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker. See Table 9.47 NF Main Circuit Breaker Interiors - Use I-Line Panelboard for 3 Ø 3W Delta applications above 240 Vac, page 9-29.

[50] PowerPacT L not available in non-vented (NEMA Type 3R/5/12, or 4/4X) enclosures. [51] Space Factor is added to Space Factors for Interior and Main Breaker (if present).

[52] D9 8.75" deep enclosure and three point latch door is required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker. PowerPacT L Sub-Feed Circuit Breakers cannot be installed on 400A NF Panelboard interiors. Use NF interiors with a mains ratings of at least 600A for all NF Panelboards applications requiring a PowerPacT L circuit breaker. See Table 9.47

9-32

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