Separated Distribution and Split Bus NF and NQ Panelboards

Refer to Panelboards

Separated Distribution and Split Bus NF and NQ Panelboards

Square D Separated Distribution and Split Bus Panelboards provide compact, affordable options to protect lighting, HVAC, renewable energy, and appliance circuits in buildings.

Separated Distribution Panelboards facilitate Separation of Electrical Circuits for Electrical Energy Monitoring to simplify compliance with
Section 130.5-B of California’s 2016 Building Energy Efficiency Standards.

note

Refer to Data Bulletin 1600HO1701 for more information.

Special lug pad adaptors allow field removal of cables, for easy field installation of solid core or split CTs for electrical energy measurement, by load type.

Split Bus panelboards enable configurations of two or three back fed main circuit breakers, with independent branch distribution sections, in a single enclosure.

Separated Distribution Interiors (Cabled Between Sections)

Separated Distribution Interiors
(cabled between sections)

Max. No. of
Available Pole Spaces

Box Height
(in.)

Product Family

Main Amp-
acity MLO

Voltage Phases

Main

Split

Split 2

Main Lug Only

Main Circuit Breaker

NQ

225 A 3 Ph

30

18

18

62 74

18

18

18

62 74
400 A

30

18

18

80 92

18

18

18

80 92

NF

250 A 3 Ph

30

18

18

80 92

18

18

18

74 86

Bus Bar Interiors
(125 A Max. Split Amps)

Split Bus Bar Interiors
(125 A Max. Split Amps)

Max. No. of
Available Pole Spaces

Box Height
(in.)

Product Family

Main Amp-
acity MLO

Voltage Phases

Main

Split

Split 2

Main Lug Only

Main Circuit Breaker

NQ

225 A 1, 3 Ph

18

30

44 56
1, 3 Ph

30

18

44 56
1, 3 Ph

30

30

44 56
3 Ph

30

18

18

50 62

NF

250 A 3 Ph

18

30

56 68
1, 3 Ph

30

18

56 68
1, 3 Ph

30

30

62 74
3 Ph

30

18

18

74 86

Square D NF and NQ Separated Distribution and Split Bus Panelboards come Factory Assembled with copper bus, with or without an integral Main Circuit Breaker. A wide variety of configurations may be submitted for quotation via Square D QuoteFAST, and may be quoted or ordered by Authorized Distributors using SE Advantage or E-Way Quote Management.

Features:

  • Multiple branch section configurations (pole spaces per section):

    • Split Bus: 18-30; 30-18; 30-30; 30-18-18

    • Separated Distribution: 30-18-18; 18-18-18

  • Up to 400 A Mains rating for NQ; up to 250 A Mains in NF panelboards

Notes:

Enclosure width / depth: 20” / 5.75” minimum.

Subfeed breaker or lugs, feed through lugs not available at top or bottom ends of panel.

  • Split Bus - feeder breaker (125 A max.) in downstream split section back-fed from feeder breaker in upstream main or split section.

  • Segregated Distribution - cables may be removed in the field. Downstream Split section may have same rating as Main.

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