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3G Electric
SQUARE D NQ Main Lug - Square D NQ Main Lug, Convertible Panel Interiors
SQUARE DSquare D NQ Main Lug, Convertible Panel Interiors

SQUARE D NQ Main Lug

The Square D NQ Main Lug, Convertible Panel Interior (MPN NQ430L4) is a 30-space, 400 A panelboard interior with an aluminum bus, measuring 45 in Ht by 10 7/16 in Wd. It accepts QHB, QOB, and QOB-VH circuit breakers…

SKU 3G-OTH-772236

Brand
SQUARE D
Item
NQ Main Lug
Part Number
NQ430L4
Category
Square D NQ Main Lug, Convertible Panel Interiors
Available to Order
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Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Required — additional freight charges may applyThis item requires special shipping, additional charges may apply.

Technical Specifications

SQUARE D
Manufacturer Part Number
NQ430L4
Type
Aluminum, QHB/QOB/QOB-VH
Wd
10 7/16 in
Ht
45 in
Amps
400 A
Depth
5-3/4 in
Phase
Three
Width
10-7/16 in
Height
45 in
UNSPSC
39121103
Voltage
120/208 to 240V AC
Standards
CSA Approved; UL Listed
Bus Material
Aluminum Bus Material Bus Material This is the material of the bus bar in the load center or panelboard.
Catalog Page
187
For Use With
NQ Circuit Breakers
Number of Spaces
30
Country of Origin
South Korea (subject to change)
Circuit Breaker Type
Plug In Miniature
Recommended Enclosure
12N640 for Main Breaker; 1D700 for Main Lug
Circuit Breaker Series
QHB; QOB; QOB-VH
Recommended Flush Cover
3TX94 for Main Breaker; 4HHA2 for Main Lug
Recommended Surface Cover
12N641 for Main Breaker; 3TX88 for Main Lug
Recommended Ground Bar Kit
5B716
Short Circuit Current Rating
100000 RMS Symmetrical
Main Circuit Breaker Adapter Kit
4HHA5
Main Circuit Breaker or Main Lug
Convertible; Main Lug

Technical Documents

(1)
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Square D NQ Main Lug, Convertible Panel Interior (MPN NQ430L4) is a 30-space, 400 A panelboard interior with an aluminum bus, measuring 45 in Ht by 10 7/16 in Wd. It accepts QHB, QOB, and QOB-VH circuit breakers, providing a flexible, convertible main-lug configuration for commercial and industrial power distribution.

Frequently Asked Questions

What is the Square D NQ430L4 panelboard interior used for?

The Square D NQ430L4 panelboard interior distributes power in commercial and industrial electrical systems. It accepts QHB, QOB, and QOB-VH circuit breakers in a convertible main-lug configuration, supporting up to 400 A with an aluminum bus for reliable branch-circuit protection.

What are the specifications of the Square D NQ430L4?

The Square D NQ430L4 panelboard interior has 30 spaces, 400 A rating, aluminum bus material, and accepts QHB, QOB, and QOB-VH breakers. Dimensions are 45 in Ht by 10 7/16 in Wd. It is a convertible main-lug type for flexible power distribution.

Where to buy Square D NQ430L4 worldwide?

3G Electric supplies the Square D NQ430L4 panelboard interior worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Square D equipment and support your project from quote to delivery.

How to select the right Square D panelboard interior?

Select a Square D panelboard interior by matching the ampere rating (400 A for NQ430L4), number of spaces (30), bus material (aluminum), and breaker compatibility (QHB, QOB, QOB-VH). Verify dimensions fit your enclosure and that the main-lug or main-breaker configuration meets your distribution needs.

Used in

Common applications for SQUARE D
Commercial electrical panels — QO and QOB miniature circuit breakers for overcurrent protection in load centers and panelboards.
HVACR equipment — 8910 Series Type DPA definite purpose contactors for switching compressor and fan motor loads.
Industrial power distribution — J-Frame molded case circuit breakers for main and feeder protection in switchboards.
Residential ground-fault protection — QO and QOB GFI circuit breakers for kitchens, bathrooms, and outdoor circuits.
Motor control centers — definite purpose contactors for controlling pumps, fans, and other moderate motor loads.
OEM machinery — Square D circuit breakers and contactors for integration into control panels and equipment.
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SQUARE D Products

3G Electric supplies SQUARE D square d nq main lug, convertible panel interiors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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