Square D NQMB L-Frame Sub-Feed...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$419.99
Square D NQMB L-Frame Sub-Feed Breaker Kit, Panelboard Accessory

Square D NQMB L-Frame Sub-Feed Breaker Kit, Panelboard Accessory

(No reviews yet) Write a Review

Model: NQMB2Q

In Stock (leaves warehouse same day if ordered before 3pm ET)

$419.99
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like
"

Square D NQMB L-Frame Sub-Feed Breaker Kit, Panelboard Accessory

The Square D NQMB L-Frame Sub-Feed Breaker Kit is a factory-assembled panelboard accessory for NQ and NF panelboards, engineered to add sub-feed capability without replacing the panelboard. This field-installable L-Frame kit supports QB/QD/QJ/QL circuit breakers and is available in amperage ratings from 225A to 400A, letting electricians match the kit to the panelboard's sub-feed requirements. The kit is CSA certified and backed by an 18-month warranty, making it a reliable choice for professional electrical distribution work.

Key Features

  • Amperage Range: Available in ratings from 225A to 400A to support QB/QD/QJ/QL circuit breakers in NQ and NF panelboards.
  • Sub-Feed Configuration: L-Frame breaker kit purpose-built for sub-feed applications, adding distribution flexibility to existing panelboards.
  • Modular Construction: Field-installable accessory and conversion kit design simplifies panelboard upgrades and retrofits.
  • Factory Assembled: Pre-assembled construction allows design flexibility and maximizes job-site productivity.
  • Wire Configuration: Rated for a total of 3 wires per connection point.
  • Tightening Torque: 31 N.m torque specification for secure, code-compliant terminations.
  • Easy to Modify: Enables electricians to extend or reconfigure the panelboard as facility needs change.
  • Environmentally Conscious: Toxic heavy metal free and mercury free construction.

Certifications & Compliance

  • CSA Certified
  • RoHS Compliant
  • REACH Compliant – Free of Substances of Very High Concern above the threshold
  • Green Premium Product
  • WEEE Compliant

Technical Specifications

  • Series: NQ
  • Amperage Options: 225A, 400A
  • Total Number Of Wires: 3
  • Tightening Torque: 31 N.m
  • Warranty Period: 18 months
  • Toxic Heavy Metal Free: Yes
  • Mercury Free: Yes
  • Product Certifications: CSA
  • ROHS EUR In Scope: Yes
  • Reach Free SHVC: Yes
  • Legacy WEEE Scope: In
  • Environmental Disclosure: ENVPEP2303005

Typical Applications

  • Commercial and Industrial Panelboard Installations
  • Sub-Feed Breaker Configurations for NQ/NF Panelboards
  • Panelboard Servicing, Retrofits, and Upgrades
  • New Construction Electrical Distribution

Why Square D?

Square D by Schneider Electric offers a wide selection of NQ/NF panelboard accessories and replacement parts, letting electricians keep panelboards code-compliant as facility needs evolve. This CSA certified, factory-assembled sub-feed breaker kit spans a 225A to 400A range, is backed by an 18-month warranty, and is built for professional electrical installations.

"

Manufacturer Resources

Product Specs

Product Type:
Panelboard Accessory
Series:
NQ
Configuration:
Sub-Feed Breaker Kit, L-Frame
Listing:
CSA
Standards:
RoHS
Department:
Electrical
Product Group:
Power Distribution
Amperage Rating:
225A - 400A
Product Subgroup:
Panelboards & Load Centers

Square D NQMB2Q – Frequently Asked Questions

1) What amp ratings does the Square D NQ sub-feed breaker kit come in?
Two ratings are offered: a 225A kit, part number NQMB2Q, and a 400A kit, part number NQMB6PPL. Pick the kit that matches the sub-feed breaker frame size you are feeding, not the panel bus rating.
2) Do I have to replace my panelboard to add a sub-feed breaker, or can I retrofit one?
You can retrofit. The Square D L-Frame sub-feed kit is a factory-assembled, field-installable accessory for NQ and NF panelboards, which is the point of the modular design: extend or reconfigure the panel as loads change rather than pulling the enclosure. Typical use is commercial and industrial retrofits, service work and new construction distribution.
3) Is the ABB NKA8474 200% neutral kit an alternative to the Square D NQ L-Frame sub-feed breaker kit?
No - they solve different problems. The Square D NQ L-Frame kit is a sub-feed breaker kit for NQ and NF panelboards, factory assembled and field installable, supporting QB/QD/QJ/QL breakers up to 600A so an electrician can add a sub-feed tap without swapping the panelboard. The ABB NKA8474 is a 200% neutral kit for Pro-Stock merchandise lighting panelboards, which addresses neutral capacity on harmonic-heavy lighting loads rather than adding a breaker feed. If the requirement on the drawing is a downstream sub-feed, the Square D kit is the part; if it is oversized neutral bussing, it is not.
4) Is this a 3-wire or 4-wire sub-feed kit?
The NQ L-Frame sub-feed kit is rated for a total of 3 wires. If your sub-feed run needs a separate neutral landed through the kit, confirm the 3-wire configuration covers your conductor count before you order.
5) What torque do I tighten the lugs to on the Square D NQ sub-feed breaker kit?
Terminations on this kit are specified at 31 N.m. Use a calibrated torque wrench on every lug; torque values on panelboard sub-feed connections are what an inspector checks first.
6) Is the Square D NQ sub-feed breaker kit CSA certified for Canadian jobs?
Yes, it carries CSA certification, which is what a Canadian AHJ will look for on a panelboard accessory. It is also RoHS compliant.
7) My panelboard is an ABB PNBD or Pro-Stock lighting panel - will the Square D NQ L-Frame sub-feed kit fit it?
Plan on no. The Square D NQ L-Frame sub-feed breaker kit is built for the Square D NQ series and is described for NQ and NF panelboards using QB/QD/QJ/QL breakers. ABB accessories such as the 569B806G numbering strip for PNBD panelboards and the NKA8474 neutral kit for Pro-Stock merchandise lighting panelboards are matched to those ABB enclosures instead. Panelboard accessories are interior-specific, so match the kit to the panel family stamped on the can rather than to the amperage alone.
8) I need to identify circuits after adding a sub-feed - does the Square D NQ L-Frame kit cover that, or do I need a numbering strip?
Those are separate items. The Square D NQ L-Frame sub-feed breaker kit is the power-path accessory: an L-Frame breaker kit rated for a total of 3 wires with a 31 N.m tightening torque, offered in 225A and 400A versions. Circuit identification is handled by a labeling accessory such as the ABB A Series circuit numbering strip for PNBD panelboards, which is an identification part and carries no breaker or current path. Order the Square D kit for the sub-feed itself and treat circuit marking as a separate line.
How fast can I get the Square D NQMB2Q delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D NQMB2Q come with a warranty?
Absolutely. The Square D NQMB2Q is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D NQMB2Q?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D NQMB2Q from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!