1600CT1901

NF Interiors

Main Lug Interiors

(Refer to Digest 178, Section 9)

Single-phase and three-phase interiors from 125 A–800 A are available factory assembled, or setup for repetitive OEM sale. RTI interiors are available for 3-phase, 4-wire applications from 125 A–600 A.

  • Accept EDB, EGB, or EJB bolt-on (125 A max.) branch circuit breakers (100 A max. at 600/347 Vac).

  • 125 A and 250 A interiors are suitable for use as cULus service entrance with branch mounted EDB, EGB, or EJB circuit breakers.

  • 125 A–400 A main lug interiors are available in aluminum or copper and are convertible to main circuit breaker interiors by adding a main circuit breaker adapter kit and a main circuit breaker.

  • Copper bus is standard on 600 A and 800 A interiors

    • 800 A interiors require deep enclosures

Main Circuit Breaker Interiors

Single-phase and three-phase main circuit breaker interiors up to 600 A are available factory assembled or setup for repetitive OEM sale. Main lug RTI interiors accept main circuit breakers and main circuit breaker kits.

Refer to NF catalog 1670CT0701 and Digest 178, Section 9 for more information on NF main circuit breaker panelboards.

NF Interior Part Numbering

NF 4 42 L 2 C  
          C = copper
Blank = aluminum
        Mains rating:
1 = 125 A
2 = 250 A
4 = 400 A
6 = 600 A
8 = 800 A
      Main type:
L = lugs M = circuit breaker
    Circuit breaker counts: 30, 42, 54, 66, 84
  Blank = Single-phase
4 = 3-phase 4-wire
3 = 3-phase 3-wire
Family: NQ, NF

NF Single-Row (Column-width) Interiors

NF column-width panelboards (see Digest 178, Section 9) support AC applications up to 600Y/347 Vac. They meet Federal Specification W-P-115c, Type 1, Class 1, and are UL Listed. NF column-width panelboard accept 10 A–60 A bolt-on 1-, 2-, and 3-EDB, EGB, or EJB branch circuit breakers.

  • Mains ratings: 125 A, or 225 A

  • Branch circuit breakers: 60 A max. bolt-on

NF Column Width Interior Part Numbering

NF 8 4 42 M 2 J D C    
                C = copper

NF8442M2J2DC

              Main circuit breaker interruption rating (See Digest 178, Section 9)
            Main circuit breaker:
PowerPact H or J
          Interior rating:
1 = 125 A
2 = 225 A
        Main: L = lug; B, M = circuit breaker
      Circuit Counts: 30 or 42
    Blank = 1-phase
3 = 3-phase 3-wire
4 = 3-phase 4-wire
  8 = Column-width panelboard
Family: NQ, NF
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