Interiors

Main Circuit Breaker Interiors

400 A LA
Main Circuit Breaker Interior

800 A MG
Main Breaker
Panelboard

May be assembled from merchandised main lug interiors, main breaker, and main breaker kits
Accepts bolt-on branch circuit breakers
May be top or bottom feed.
May be suitable for use as UL service entrance (with US Service Entrance Barrier Kit installed); (Canadian service entrance available factory-assembled).
Barriers must be installed in jurisdictions that have adopted the 2017 National Electric Code.

US Service Entrance Barrier Kits*

UL Service Entrance Barrier	Description	Applicable Main Breakers
HJQLLC	H/J/Q Line Lug Cover	PowerPacT™ H, J
LALLC	LA/LH Line Lug Cover	LA/LH
PPLLC	PowerPacT™ L Line Lug Cover	PowerPacT™ L
PPPLLC	PowerPacT™ P Line Lug Cover	PG, PJ, PL
EDBS	E Frame Line Lug Cover	EDG, EGB, EJB

65 k AIRAIR = Ampere Interrupting Rating.* maximum branch circuit breakers at 480Y/277 Vac
25 k AIR maximum branch circuit breakers at 600Y/347 Vac
Series rated up to 200 k AIR maximum when supplied by PowerPacT™ circuit breaker
Available with silver-plated copper or tin-plated aluminum bus (aluminum is standard). Tin-plated copper bus and thick silver-plated copper bus are available as an option; 600 and 800 A only available with copper.
Branch connector fingers are tin-plated copper; silver-plated branch connector fingers are optional.
125 A at 480Y/277 Vac (100 A at 600Y/347 Vac) main circuit breaker interiors may contain branch mounted EDB, EGB, or EJB main circuit breakers
125–250 A main circuit breaker panelboards may be assembled from:
- Standard main lug interiors
- Main circuit breaker adapter kit (N150MH, N250MJ)
- Appropriate PowerPacT™ H- or J-Frame circuit breakers
- Line lugs suitable for 75⁰C copper or aluminum wire
Merchandised 400 to 600 A main circuit breaker panelboard consists of:
- 400 or 600 A 3-phase or single phase main lug interior
- N400M main circuit breaker adapter kit and
  - appropriate LA or LH (400 A max.) circuit breaker, or
- N600MPPL main circuit breaker adapter kit
  - appropriate 400 or 600 A max. LG, LJ, LL, or LR circuit breaker*

N600MPPL Main Breaker Kit

Factory assembled 400 A main circuit breaker interiors are available with LA, LH, LG, LJ, LL, or LR circuit breakers.
Factory assembled 600 A main circuit breaker interiors are available with LG, LJ, LL, or LR circuit breakers.
Factory assembled 800 A main circuit breaker interiors are available with MG, PG, PJ, or PL circuit breakers.

400 A Main Lugs Interior with 400 A Main Circuit Breaker and Adapter Kit

Options for Main Lug Interiors

NFCUV4 400 A
Lug Kit

Optional Main Lugs

Compression lugs, or copper mechanical lugs, are available for 125–800 A main lug interiors.

Main Lug Kits

Ampacity	Al Compression Lug Kit	Cu Mechanical Lug Kit	Cu Compression Lug Kit
Ampacity	Catalog Number	Catalog Number	Catalog Number
125 A	NFALV1	NFCUM1	NFCUV1
250 A	NFALV2	NFCUM2	NFCUV2
400 A	NFALV4	NFCUM4	NFCUV4
600 A	NFALV6	NFCUM6	NFCUV6
800 A	Factory Assembled Only

400 A Main Lug Interior with
Sub-Feed Lugs

Front View

Bottom View

Sub-Feed Lugs (on the Mains)

NOTE:

Copper mechanical lugs available on 125–800 A main lug interiors
Copper compression lugs available on 125–400 A main lug interiors

NF400SFL Sub-Feed Lug Kit

Sub-Feed Lug Kits (Aluminum Mechanical)

Amperes	Catalog Number
125 A	NF125SFL
250 A	NF250SFL
400 A	NF400SFL
600 A	Factory Assembled Only

NF400FTL
(400 A Feed-Through
Lug Kit)

NF250FBJ Sub-Feed Breaker Kit

Feed-Through Lugs (end opposite the Mains)

NOTE: Mechanical or compression lugs available on 1Ø or 3Ø, 125–800 A main lug or 100–600 A main circuit breaker interiors.

Aluminum or Copper lugs available for interiors rated to 800 A

Field-Installable Feed-Through Lugs

Mains Rating	Added Length*	Catalog No.
125 A	6 Inches	NF125FTL
250 A	12 Inches	NF250FTL
400 A	6 Inches*	NF400FTL*
600 A	6 Inches*	Factory Assembled Only

Sub-Feed Circuit Breakers

NOTE: Available on 1Ø or 3Ø, 125–800 A main lug or 250–800 A main circuit breaker interiors.

Catalog Number	Interior Amperes	Breaker Frame / Max. Amps	Number of SFBs
NF250SFBH	250	PowerPacT H / 150	1
NF250SFBJ	250	PowerPacT J / 250	1
NF600SFBH	400, 600	PowerPacT H / 150	2
NF600SFBJ	400, 600	PowerPacT J / 250	2
N600MPPL	600	PowerPacT L / 400	1
NF600SFBPPL	600	PowerPacT L / 600	1

One sub-feed PowerPacT L (up to 600 A), or one factory assembled LA or
LH circuit breaker (up to 400 A), or one or two PowerPacT™ H or J frame
sub-feed circuit breakers may be installed in 400–800 A panelboards.

Lighting Contactors

ASCO brand Lighting Contactors are available as an option in factory-assembled panelboards. 2-pole and 3-pole contactors are available for 30, 60, 75, 100, 150, 200, or 225 A branch applications. For more information please explore ASCO 920 Lighting Contactors at www.ascopower.com.