1640CT0801

Interiors

Main Lug Interiors

225 A Maximum Main Lug Interior and Deadfront
  • Will accept plug-on or bolt-on branch circuit breakers

  • Top- or bottom-feed

  • 65k AIR maximum branch circuit breakers (fully-rated)

  • 200k AIR maximum when supplied by remote PowerPact circuit breaker (series rated)

  • Field-installable sub-feed lug kits for 100–400 A interiors

  • Factory installed main lugs on all interiors

  • 225–400 A main lug interiors are convertible to main circuit breaker by adding a main circuit breaker and adapter kit

  • Available with silver/tin-plated copper or tin-plated aluminum bus (aluminum is standard). Tin-plated or thick silver plated copper bus are available options. Branch connector fingers are tin-plated copper; thick silver-plated branch connector fingers are optional

Main Lugs for MLO Interiors

Main Lug Interiors

100–225 A Maximum and 600 A Maximum

Aluminum Main lugs for MLO Interiors

Amperes Catalog Number Lug Wire Range for wire bending space
Aluminum Mechanical (Standard)*
100

NQALM1

(1) #6–2/0
225

NQALM2

(1) #6–350 kcmil
400

NQALM4

(1) 1/0–750 kcmil, or (2) 1/0–350 kcmil
600

NQALM6

(2) 1/0–750 kcmil
600*

NQALM6A

(3) 1/0–250 kcmil
Aluminum Compression
100

NQALV1

(1) #4–300 kcmil
225

NQALV2

(1) 250–350 kcmil
400

NQALV4

(2) 2/0–500 kcmil
600

NQALV6

(2) 2/0–500 kcmil
NQALM2 225 A Main Lug Kit NQALM6A 600 A Main Lug Kit
Type VCEL VERSAtile™ Compression Equipment Terminals
 
NQCUM2 225 A Copper Mechanical Lugs
 
NQCUV2 225 A Copper Compression Lugs

Copper Main lugs for MLO Interiors

Amperes Catalog Number Lug Wire Range for wire bending space
Copper Mechanical
100

NQCUM1

(1) #6–2/0
225

NQCUM2

(1) #6–350 kcmil
400

NQCUM4

(1) 1/0–750 kcmil, or (2) 1/0–350 kcmil
600

NQCUM6

(2) 1/0–750 kcmil
Copper Compression
100

NQCUV1

(1) #6–350 kcmil
225

NQCUV2

(1) #6–350 kcmil
400

NQCUV4

(1) 400–750 kcmil
600

NQCUV6

(2) 250–500 kcmil

Main Lugs Interior with PowerPact Q Main Circuit Breaker and Main Circuit Breaker Kit

Deadfront Removed

Deadfront Installed

NQ442L2 Main Lugs Interior (without deadfront) and QBL32225 Main Circuit Breaker (mounted to NQMB2Q kit)

Main Circuit Breaker Interiors

QOB Branch Mounted Main Circuit Breaker on a 225 A NQ Interior
 
QBL Main Circuit Breaker on a
3-phase NQ Main Lug Interior
  • May be assembled from merchandised main lug interiors, main circuit breaker, and main circuit breaker kits.

  • Will accept plug-on or bolt-on branch circuit breakers.

  • Merchandised main circuit breaker interiors are suitable for use as service entrance (US only).

  • Barriers must be installed in jurisdictions that have adopted the 2017 National Electric Code.

    UL Service Entrance Barrier Kits

    Catalog Number* Description Applicable Main Breakers

    HJQLLC

    H/J/Q Line Lug Cover PowerPact™ H, J, Q

    LALLC

    LA/LH Line Lug Cover LA/LH

    PPLLC

    PowerPact™ L Line Lug Cover PowerPact™ L
  • Service entrance barriers are required and available in Canada (factory-assembled only).

  • May be top-feed or bottom-feed.

  • Accept 65k AIR maximum branch circuit breakers (fully-rated).

  • May be series rated 200k AIR maximum when supplied by PowerPact™ circuit breaker.

  • Are available with silver/tin plated copper or tin-plated aluminum bus (aluminum is standard). Tin-plated or silver-plated copper bus is available as an option. Branch connector fingers are tin-plated copper; silver-plated branch connector fingers are optional.

  • 100 A main circuit breaker interiors use a standard or 14” wide main lug interior and an appropriate QOB or QOB-VH main circuit breaker in a branch space; vertical main breaker main breaker interiors are also available.

  • 110–225 A main circuit breaker may be assembled from:

    — A standard or 14” wide main lug interior.

    — Main circuit breaker adaptor kit (NQMB2Q, NQMB2HJ) (or NQMB2Q14 or NQMB2HJ14 for 14" interiors).

    — Appropriate PowerPact™ H, J, or Q frame circuit breaker

  • 250 A main circuit breaker interiors are factory-assembled only.

  • Merchandised 400 A main circuit breaker interiors consist of:

    — 400 A 3-phase or single phase main lug interior.

    — Main circuit breaker adapter kit (Catalog No. NQMB4LA).

    — Appropriate LA or LH circuit breaker.

  • Factory assembled 400 A main circuit breakers are available with LA, LH, or PowerPact™ L* main circuit breakers.

  • 600 A main circuit breaker interiors (factory-assembled only) use:

    — Appropriate LD, LG, LJ, or LL circuit breaker.*

Main Circuit Breaker Adapter KitHardware not shown to scale

NQMB2Q Kit Contents

A Main circuit breaker deadfront cover (1)
B Main circuit breaker mounting pan (1)
C Deadfront support brackets (2)
D “Main” circuit breaker label (1)
E 10-32 x 7/16-inch tapping screws (2)
F 10-32 x 5/16-inch tapping screws (6)
G 8-32 x 2 ¼-inch tapping screws (2)
H 8-32 x 3 ¼-inch tapping screws (2)
I Main lug wires (4)

Main Circuit Breaker Adapter Kits

Catalog No. Ampere Rating Main Circuit Breaker

NQMB2Q

100–225 A PowerPact™ Q

NQMB2HJ

100–225 A PowerPact™ H or J

NQMB4LA

125–400 A LAL, LHL

NQMB4LA, 400 A LA/LH Main Breaker Kit

Main Circuit Breakers

Max. Amperes Circuit Breaker Type
100 A QOB*, QOB-VH*
150 A HDL, HGL, HJL, HLL, or HRL
225 A QBL, QDL, QGL, QJL, JDL, JGL, JJL, JLL, or JRL
250 A PowerPact™ J*: JD, JG, JJ, JL, or JR
400 A LAL or LHL
PowerPact™ L*: LD, LG, LJ, or LL
600 A PowerPact™ L*: LD, LG, LJ, or LL

Field-Installable Circuit Breaker Accessories

Field-installable shunt trip, alarm switch, and other accessories are available for PowerPact™ H, J, L and LA/LH main circuit breakers. Refer to Catalog 0616CT1001 or 0601CT9101 for additional information.

Interior Accessories

QOB3125SL
Sub-Feed Lug Device
 
NQSFL4, 400 A
Sub-Feed Lug Kit
 
NQFTL2, 225 A
Feed-Through
Lug Kit
 
225 A Main Lug
Interior with
Sub-Feed Lugs

Sub-Feed Lug Kits

Branch Mounted Sub-Feed Lugs

Rating Amperes Number of Poles Type of Connection Catalog No. Main Wire Size
125 2 Bolt-On

QOB2125SL

#4–2/0 Al or Cu
3

QOB3125SL

Field-Installable Sub-Feed Lugs

Field-Installable Sub-Feed Lugs

Mains Rating Added Length* Catalog No.
100 A

NQSFL1

225 A 6 Inches

NQSFL2

400 A

NQSFL4


Field installable Feed-Through Lugs

Mains Rating Interior Circuits dded Length* Catalog No.
225 A 30 6 inches

NQFTL2

42
54, 72, 84 6 inches

NQFTL2H

400 A 30

NQFTL4L

42 6 inches
54, 72 6 inches

NQFTL4H

84

Field Installable Sub-Feed Circuit Breaker Kits

Field Installable Sub-Feed Circuit Breaker Catalog Numbers

Field Ampere Rating Catalog Number Number of Sub-Feed Circuit Breakers
and Type
225

NQSFB2Q

1 Q-frame
225

NQSFB2HJ

1 H or J-frame
400

NQSFB4Q

2 Q-frame
400

NQSFB4HJ

2 H or J-frame
225 A Main Lug Interior with
Feed-Through Lugs

Factory-Installed Sub-Feed and Feed-Through Options

  • Feed-through lugs are available on standard width 1Ø or 3Ø, 100–600 A interiors (main lug interiors only).

  • Sub-feed lugs are available on 1Ø or 3Ø, 100–400 A main lug interiors only.

  • Sub-feed circuit breakers

    — Available on 1Ø or 3Ø, main lugs 225–600 A interiors (main lug or main breaker)

    — One sub-feed circuit breaker for each 225 A panelboard

    — One or two sub-feed circuit breakers for each 400–600 A panelboard

    — Sub-feed circuit breakers may be PowerPact™ H, J, or Q frame.

Fingersafe IP2X per IEC 60529 Barriers for NQ Panelboards

  • Factory-installed IP2X barriers for NQ Panelboards reduce the risk of accidental contact with energized components if a cover is removed.

  • Plastic barriers cover Mains (lugs or circuit breaker), copper bus, and branch circuit breakers, providing IP2X per IEC 60529 protection for undergrounded parts.

  • Available in 3 phase interiors with main lugs up to 400 A. Main circuit breaker choices include PowerPact™ Q, H, J or LA/LH frame.

  • Series rated up to 200 kAIC—fully rated up to 65 kA.

  • Selectively coordinated up to 30 kAIC.

  • All standard NEMA 1, 2, 3R, 4/4X, 5, or 12 enclosures available up to 225 A. Higher ampacity panels are supplied with NEMA 1 enclosures.

  • Branch breakers available to 100 A in 1P, 2P, and 3P.

  • Two factory assembled constructions:

    • Standard design that offers maximum flexibility, including interiors with
      18–84 circuits, and sub-feed lugs up to 225 A.

    • Enhanced design that retains IP2X per IEC 60529 protection whether or not a branch breaker is installed.

Standard IP2X per IEC 60529 Enhanced IP2X per IEC 6052
(Bus Finger Covers Empty Spaces) (Bus Covered Without Branch Circuit Breaker)
1 Main Lug Cover
2 Main Breaker Line Side Cover
3 Main Breaker Load Side Cover
4 Neutral Cover
5 Low Amp QO(B) Cover
6 High Amp QO(B) Cover
7 Bus Finger Cover

For more information please reference Document Number 1640BR1701.

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