NQ Merchandised Main Circuit Breaker Interiors

Online Refer to NQ Panelboards

NQ Main Circuit Breaker Interiors—240 Vac, 48 Vdc

Main Circuit Breaker Interiors—Will accept plug-on and bolt-on circuit breakers

Circuit Breaker
Pole
Spaces[1]

Mains

Rating (Amps)

Interior Only Catalog Number

(Order Branch Circuit Breakers Separately) [2][3]

Main Circuit Breaker Adapter Kits
(Less Circuit Breaker) 

NEMA Type 1 Enclosure Catalog Numbers

Mono-Flat™ 3 Point Latch Trim Front[4][5]

Hinged 3 Point Latch Trim Front[4][5]

Water, Dirt, and Dust Resistant Enclosure Catalog Numbers   [6]

Main Breaker Kit

UL SE Barrier Kit[7]

Circuit
Breaker Frame Size[8]

Box
20 in. W x 5.75 in. D[9] or 8.75 in. D[10]

Mono-Flat Trim Front  [4]

Hinged Trim Front[4]

Type
3R/5/12
20 in. Wide x 5.75 in. Deep[11]

Type 3R 26 in. Wide x 8.75 in. Deep[12]

Height (In.)

20-inch-wide Cabinet [13]—Single Phase 3-Wire

16[14] 100
back-fed

NQ18L1

Select
2-pole QOB or QOB-VH[15]

MH26

NC26 ( )

NC26( )HR

MH26WP

26

NQ18L1C

28[14]

NQ30L1

MH32

NC32 ( )

NC32( )HR

MH32WP

32

NQ30L1C

26[14] 110-150 back-fed

NQ30L2

Select
2-pole
QOB-VH[15] [16]

MH44

NC44 ( )

NC44( )HR

MH44WP

44

NQ30L2C

38[14]

NQ42L2

NQ42L2C

50[14]

NQ54L2

MH50

NC50 ( )

NC50( )HR

MH50WP

50

NQ54L2C

68[14]

NQ72L2

MH56

NC56 ( )

NC56( )HR

MH56WP

56

NQ72L2C

80[14]

NQ84L2

MH62

NC62 ( )

NC62( )HR

MH62WP

62

NQ84L2C

18 100

NQ18L1

NQMB2HJ

HJQLLC

HD, HG, HJ, HL, HR[17] (100 A maximum)

MH38

NC38 ( )

NC38( )HR

MH38WP

38

NQ18L1C

30

NQ30L1

MH44

NC44 ( )

NC44( )HR

MH44WP

44

NQ30L1C

225

NQ30L2

NQMB2HJ


NQMB2Q

HJQLLC

HD, HG, HJ, HL, HR, JD, JG, JJ, JL, JR[17]; or QB, QD, QG, QJ

NQ30L2C

42

NQ42L2

MH50

NC50 ( )

NC50( )HR

MH50WP

50

NQ42L2C

72

NQ72L2

MH56

NC56 ( )

NC56( )HR

MH56WP

56

NQ72L2C

84

NQ84L2

MH62

NC62 ( )

NC62( )HR

MH62WP

62

NQ84L2C

30 400

NQ30L4

NQMB4LA

LALLC

LA/LH[18]

NC62V ( )

NC62V( )HR

NC62V( )3P

NC62( )3PHR

MH62D9VWP

NQ30L4C

42

NQ42L4

NQ42L4C

54

NQ54L4

MH68

NC68V ( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

MH68WP

MH68D9VWP

68

NQ54L4C

84

NQ84L4C

MH80

NC80V ( )

NC80V( )HR

NC80V( )3P

NC80V( )3PHR

MH80WP

MH80D9VWP

80
30

NQ30L4

NQMB6PPL

PPLLC

LG, LJ, LL

MH62D9[10]

NC62V( )

NC62V( )HR

NC62V( )3P

NC62V( )3PHR

Factory Assembled Only 62

NQ30L4C

42

NQ42L4

MH68D9[10]

NC68V( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

68

NQ42L4C

54

NQ54L4

MH74D9[10]

NC74V( )

NC74V( )HR

NC74V( )3P

NC74V( )3PHR

74

NQ54LC

84

NQ84L4C

MH86D9[10]

NC86V( )

NC86V( )HR

NC86V( )3P

NC86V( )3PHR

86
30 600

NQ30L6C

NQMB6PPL

PPLLC

LG, LJ, LL

MH62D9[10]

NC62V( )

NC62V( )HR

NC62V( )3P

NC62V( )3PHR

Factory Assembled Only 62 / 68
42

NQ42L6C

MH68D9[10]

NC68V( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

68 / 74
54

NQ54L6C

MH74D9[10]

NC74V( )

NC74V( )HR

NC74V( )3P

NC74V( )3PHR

74 / 80
84

NQ84L6C

MH86D9[10]

NC86V( )

NC86V( )HR

NC86V( )3P

NC86V( )3PHR

86

Circuit Breaker
Pole
Spaces[1]

Mains

Rating (Amps)

Interior Only Catalog Number

(Order Branch Circuit Breakers Separately) [2][3]

Main Circuit Breaker Adapter Kits
(Less Circuit Breaker) 

NEMA Type 1 Enclosure Catalog Numbers

Mono-Flat™ 3 Point Latch Trim Front[4][5]

Hinged 3 Point Latch Trim Front[4][5]

Water, Dirt, and Dust Resistant Enclosure Catalog Numbers   [6]

Main Breaker Kit

UL SE Barrier Kit[7]

Circuit
Breaker Frame Size[8]

Box
20 in. W x 5.75 in. D[9] or 8.75 in. D[10]

Mono-Flat Trim Front  [4]

Hinged Trim Front[4]

Type
3R/5/12
20 in. Wide x 5.75 in. Deep[11]

Type 3R 26 in. Wide x 8.75 in. Deep[12]

Height (In.)

20-inch-wide Cabinet[19]—Three Phase 4-Wire

15[14] 100 back-fed

NQ418L1

Select
3-pole
QOB or
QOB-VH[15]

MH26

NC26 ( )

NC26( )HR

MH26WP

26

NQ418L1C

27[14]

NQ430L1

MH32

NC32 ( )

NC32( )HR

MH32WP

32

NQ430L1C

24[14] 110-150 back-fed

NQ430L2

Select
3-pole
QOB-VH[15][16]

MH44

NC44 ( )

NC44( )HR

MH44WP

44

NQ430L2C

36[14]

NQ442L2

NQ442L2C

48[14]

NQ454L2

MH50

NC50 ( )

NC50( )HR

MH50WP

50

NQ454L2C

66[14]

NQ472L2

MH56

NC56 ( )

NC56( )HR

MH56WP

56

NQ472L2C

78[14]

NQ484L2

MH62

NC62 ( )

NC62( )HR

MH62WP

62

NQ484L2C

18 100

NQ418L1

NQMB2HJ

HJQLLC

HD, HG, HJ, HL, HR
(100 A maximum)

NC38 ( )

NC38( )HR

38

NQ418L1C

30

NQ430L1

MH44

NC44 ( )

NC44( )HR

MH44WP

44

NQ430L1C

225

NQ430L2

NQMB2HJ


NQMB2Q

HD, HG, HJ, HL, HR; JD, JG, JJ, JL, JR; or QB, QD, QG, QJ

NQ430L2C

42

NQ442L2

MH50

NC50 ( )

NC50( )HR

MH50WP

50

NQ442L2C

54

NQ454L2

NQ454L2C

72

NQ472L2

NC56 ( )

NC56( )HR

56

NQ472L2C

84

NQ484L2

NC62 ( )

NC62( )HR

62

NQ484L2C

30 400

NQ430L4

NQMB4LA

LALLC

LA/LH[18]

NC62V( )3P

NC62V( )3PHR

MH62D9VWP

NQ430L4C

42

NQ442L4

NQ442L4C

54

NQ454L4

MH68

NC68V ( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

MH68WP

MH68D9VWP

68

NQ454L4C

72

NQ472L4

MH74

NC74V ( )

NC74V( )HR

NC74V( )3P

NC74V( )3PHR

MH74WP

MH74D9VWP

74

NQ472L4C

84

NQ484L4C

MH80

NC80V ( )

NC80V( )HR

NC80V( )3P

NC80V( )3PHR

MH80WP

MH80D9VWP

80
30

NQ430L4

NQMB6PPL

PPLLC

LG, LJ, LL

MH62D9[10]

NC62V( )

NC62V( )HR

NC62V( )3P

NC62V( )3PHR

Factory Assembled Only 62

NQ430L4C

42

NQ442L4

MH68D9[10]

NC68V( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

68

NQ442L4C

54

NQ454L4

MH74D9[10]

NC74V( )

NC74V( )HR

NC74V( )3P

NC74V( )3PHR

74

NQ454L4C

72

NQ472L4

MH80D9[10]

NC80V( )

NC80V( )HR

NC80V( )3P

NC80V( )3PHR

80

NQ472L4C

84

NQ484L4C

MH86D9[10]

NC86V( )

NC86V( )HR

NC86V( )3P

NC86V( )3PHR

86
30 600

NQ430L6C

MH62D9[10]

NC62V( )

NC62V( )HR

NC62V( )3P

NC62V( )3PHR

Factory Assembled Only 62 / 68
42

NQ442L6C

MH68D9[10]

NC68V( )

NC68V( )HR

NC68V( )3P

NC68V( )3PHR

68 / 74
54

NQ454L6C

MH74D9[10]

NC74V( )

NC74V( )HR

NC74V( )3P

NC74V( )3PHR

74 / 80
72

NQ472L6C

MH80D9[10]

NC80V( )

NC80V( )HR

NC80V( )3P

NC80V( )3PHR

80
84

NQ484L6C

MH86D9[10]

NC86V( )

NC86V( )HR

NC86V( )3P

NC86V( )3PHR

86

NQ 14-inch-wide—240 Vac, 48 Vdc

Features

14–inch wide NQ
Panelboard Main Lug

Main Circuit Breaker
Panelboard

Main Lug Panelboard

14-inch-wide NQ panelboards are available for those customers whose equipment space is limited. Developed with customer input, Square D™ brand NQ panelboards are built to last, featuring innovations for ease of installation and durability.

  • 240 Vac, 48 Vdc maximum

  • 225 A maximum main circuit breaker or main lugs

  • 60 A maximum branch circuit breakers

  • Visi-Trip indication on branch circuit breakers

  • 10,000–65,000 A Short Circuit Current Rating (SCCR)

  • Interiors supplied with tin plated copper bus as standard

  • Interiors accept bolt-on and plug-on branch circuit breakers

  • Three-phase, four-wire, and single-phase, three-wire interiors available

  • Panelboards available with Mono-Flat™ front

  • May be suitable for use as service entrance equipment

  • Branch circuit filler plates provide fast and easy installation

  • Both fully and series-rated systems are available

Main Lug Interiors—Accepts Plug-On and Bolt-On Branch Breakers

Max. Number
of Breakers

Main Ratings

Interior Only (Order Branch Circuit Breakers Seperately)

NEMA Type 1 Enclosure

Box 14"W x 5.75" Db

Mono Flat Front

Hinged Front

Cat. No.

Cat. No.

Cat. No. [4]

Cat. No.

14-inch-wide Cabinet—Single Phase 3-Wire

18

100 A

NQ18L1C14

NQB532

NQC32 ( )

N/A

30

NQ30L1C14

NQB532

NQC32 ( )

N/A

30

225 A

NQ30L2C14

NQB532

NQC32 ( )

N/A

42

NQ42L2C14

NQB538

NQC38 ( )

N/A

14-inch-wide Cabinet—Three Phase 4-Wire

18

100 A

NQ418L1C14

NQB532

NQC32 ( )

N/A

30

NQ430L1C14

NQB532

NQC32 ( )

N/A

30

225 A

NQ430L2C14

NQB532

NQC32 ( )

N/A

42

NQ442L2C14

NQB538

NQC38 ( )

N/A

Main Circuit Breaker Interiors—Accepts Plug-On and Bolt-On Branch Breakers

Max. Number of Breakers

Main Ratings

Interior Only (Order Branch Circuit Breakers Seperately)

Main Circuit Breaker Kit[20]

Main Circuit Breaker Frame

NEMA Type 1 Enclosure

Box 14"W x 5.75" Db

Mono Flat Front

Hinged Front

Cat. No.

Cat. No.[21]

Cat. No. [4]

Cat. No.

14-inch-wide Cabinet—Single Phase 3-Wire

16 [22]

100

NQ18L1C14

Select QOB 2-pole or QOB-VH[20]

NQB532

NQC32 ( )

N/A

28 [22]

NQ30L1C14

NQB532

NQC32 ( )

N/A

30

225

NQ30L2C14

NQMB2HJ14

or

NQMB2Q14

HD, HG, HJ, HL, HR JD, JG, JJ, JL, QB , QD, QG, QJ

NQB544

NQC44 ( )

N/A

42

NQ42L2C14

NQB550

NQC50 ( )

N/A

14-inch-wide Cabinet—Three Phase 4-Wire

15 [22]

100

NQ418L1C14

Select QOB 3-pole or QOB-VH[20]

NQB532

NQC32 ( )

N/A

27 [22]

NQ430L1C14

NQB532

NQC32 ( )

N/A

30

225

NQ430L2C14

NQMB2HJ14

or

NQMB2Q14

HD, HG, HJ, HL, HR JD, JG, JJ, JL, QB , QD, QG, QJ

NQB544

NQC44 ( )

N/A

42

NQ442L2C14

NQB550

NQC50 ( )

N/A

NQ Accessories

Description

Catalog No.

Equipment Ground Bars

Aluminum (twenty seven terminations #14 to #4 AWG)

PK27GTA

PK23GTA+ #1 to #4/0 AWG Al or Cu lug

PK23GTAL

Copper (twenty seven terminations #14 to #4 AWG)

PK27GTACU

Ground Bar Insulator Kit

PKGTAB

Handle Attachments—Branch Circuit Breakers

Handle lock-off

HLO1

Handle tie - (QO and QOB only)

QO1HT

Handle padlock attachment—1-pole

QO1PA

2- and 3-pole

QO1PL

Handle tie and lock-off for three 1-pole (QO, QOB)

QO3HT

Other Accessories

Filler plates (15 per package)

NQFP15

Footnotes

  1. Please note that some local building codes limit panelboards to 42 circuits, including those that reference 2005 or earlier version of NFPA 70.
  2. Accepts all QO(B) shown in Tables in Sections 7 and 9. Branch circuit breaker trip ampacity cannot exceed panelboard mains rating. 175 A and 200 A circuit breakers may only be installed in single phase 400 A and 600 A NQ Panelboards. Tandem circuit breakers may not be installed.
  3. “C” suffix indicates copper bussing.
  4. Add “F” for flush mount, “S” for surface mount.
  5. Three point latch trim fronts are required for enclosures on panelboards with QO2175, QO2200, QO2175VH, or QO2200VH branch circuit breakers. These breakers take four pole spaces in single phase NQ interiors.
  6. Wall mounting brackets add 0.4 inches to back of MHxxWP enclosures.
  7. Please select the appropriate Main Breaker Barrier for UL Service Entrance applications (see US Service Entrance Barriers (required by NFPA 70—National Electrical Code® (NEC®) 2017)).
  8. Circuit breaker interrupt ratings, see the table for each circuit breaker range in Section 7.
  9. Nominal interior dimensions, see PBA600 for details.
  10. D9 suffix indicates the 8.75 in. Deep Enclosure required for panelboards wit PowerPacT L Main Breaker, Switch, or Sub-Feed Breaker. See PBA604 for dimensional details.
  11. Enclosure includes trim kit. Nominal enclosure dimensions, see PBA711 for details.
  12. Vented Type 3R enclosure with three point latch door. Required for outdoor applications with PowerPacT L main breaker, two sub-feed breakers, or sub-feed breaker with trip current >150 A. NEMA 3R enclosures must be bottom fed. Interior nominal dimensions, see PBA603WP for details.
  13. For the NQ14-inch-wide panelboard offer, See NQ 14-inch-wide—240 Vac, 48 Vdc.
  14. Pole spaces shown are available for branch circuits, with spaces deducted for the back-fed main breaker.
  15. Do not select a back-fed main for panels to be “Suitable for use as UL service equipment.” Select a H frame circuit breaker (and associated main circuit breaker kit) from the list for 225 interiors, for panels to be "Suitable for use as UL service equipment."
  16. QOB2110VH, QOB2125VH, or QOB2150VH take four pole spaces in NQ single phase interior.
  17. For single phase applications, order a 3-pole breaker. Example: HDL36100.
  18. Available for 125–400 A applications. Please order short handle circuit breaker (i.e., LAL36400MB).
  19. For the NQ14-inch-wide panelboard offer, See NQ 14-inch-wide—240 Vac, 48 Vdc.
  20. Select a Q or H frame circuit breaker, HJQLLC barrier (and associated main circuit breaker kit) from the list for 225 interiors, for panels to be "Suitable for use as UL service equipment."
  21. All 14” W boxes come with blank endwalls.
  22. Pole spaces shown are available for branch circuits, with spaces deducted for the back-fed main circuit breaker.

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