Square D NF Sub-Feed Breaker K...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,090.77
Square D NF Sub-Feed Breaker Kit, L-Frame Panelboard Accessory

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

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Model: N600MPPL

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

$1,090.77
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Square D NF Sub-Feed Breaker Kit, L-Frame Panelboard Accessory

The Square D NF Sub-Feed Breaker Kit is a field-installable panelboard accessory engineered for NQ and NF panelboards rated 400A-600A using an L-Frame configuration. Built for a short circuit withstand rating of 200 kA, this kit lets contractors and OEMs add sub-feed capability to an existing panelboard without replacing the enclosure, supporting on-site design changes and job-site flexibility. Country of origin is Mexico, and the kit ships complete and ready for installation.

Key Features

  • Line Rated Current: Designed for 400-600 A NF panelboards, L-Frame configuration.
  • Short Circuit Withstand: Rated 200 kA for demanding commercial electrical systems.
  • Factory-Assembled Design: Factory assembled options allow design flexibility and maximize job productivity.
  • Ready-to-Assemble Kit: Ready to assemble kits and accessories support on-site design changes.
  • Field Modifiable: Easy to modify or extend the use of the panelboard.
  • Complete Hardware Set: Includes phase-in, deadfront extension, phase insulator, deadfront cover, L-frame deadfront escutcheon, deadfront insulator, label set, and 19 screws.
  • Wide Accessory Selection: NQ and NF offer a wide selection of accessories and replacement parts.

Certifications & Compliance

  • RoHS EUR Compliant (In Scope)
  • Mercury Free
  • Toxic Heavy Metal Free
  • Reach Free of SVHC Above Threshold

Technical Specifications

  • Toxic Heavy Metal Free: Yes
  • Take Back: No
  • Tier: 2
  • Returnability: Yes
  • H And D Subrange: COM
  • Sustainable Packaging: No
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: No
  • Reach Free Shvc: Yes
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • Legacy WEEE Scope: In
  • Packaging Made With Recycled Cardboard: No
  • China ROHS Label: 1
  • With Recycled Cardboard: No
  • WEEE Product Category: 4
  • Energy Efficiency Optimized: False
  • Without Single Use Plastic: No
  • Product Availability: Stock - Normally stocked in distribution facility
  • ROHS Exemption Information: Yes
  • Reach Free Of Svhc: Yes

Typical Applications

  • Commercial Electrical Panelboard Upgrades
  • Sub-Feed Breaker Installations on NQ/NF Panelboards
  • Panelboard and Load Center Modifications
  • Job-Site Design Changes and Renovation Projects
  • Original Equipment Manufacturer Panel Assembly

Why Square D?

Square D NQ and NF panelboard accessories use modular, factory-assembled construction so contractors and OEMs can adapt panelboards on-site with confidence. With a 200 kA short circuit withstand rating and a complete field-installable hardware set, this sub-feed breaker kit supports reliable, code-compliant commercial electrical installations.

Manufacturer Resources

Product Specs

Product Type:
Breaker Kit
Configuration:
L-Frame
Amperage Rating:
400-600A
Country of Origin:
Mexico
Standards:
RoHS EUR Compliant
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

Square D N600MPPL – Frequently Asked Questions

1) Will the Square D N600MPPL sub-feed kit work on my NQ panelboard, or is it NF only?
The N600MPPL sub-feed breaker kit is built for both NQ and NF panelboards, as long as the panel is in the 400-600 A range and uses an L-Frame configuration. The L-Frame part is the hard limit: it is not a universal kit, and it will not mount to a panel prepped for a different frame size breaker.
2) Can I add a sub-feed breaker to an existing panelboard without swapping out the enclosure?
That is exactly what this kit is for. The Square D N600MPPL is field-installable, so a 400-600 A L-Frame NQ or NF panelboard can take sub-feed capability without replacing the can or the interior. It suits renovation work and job-site design changes where the panel is already set in the wall.
3) What actually comes in the Square D N600MPPL kit, and what do I still have to order?
The kit ships with the phase-in, deadfront extension, phase insulator, deadfront cover, L-frame deadfront escutcheon, deadfront insulator, a label set, and 19 screws. That is the mounting and deadfront hardware. The sub-feed breaker itself is a separate order, sized to your L-Frame panel.
4) Does this Square D sub-feed kit fit a 225A NF panelboard?
No. The N600MPPL is scoped to 400-600 A panelboards using an L-Frame configuration. A 225 A NF panel uses a smaller frame, so this kit's escutcheon and deadfront hardware will not line up. You need the sub-feed kit matched to that panel's frame size.
5) Can an ABB ProStack MB Series breaker kit be used in place of the Square D N600MPPL sub-feed kit?
No. The N600MPPL is a sub-feed breaker kit built specifically for Square D NQ and NF panelboards rated 400-600A in an L-Frame configuration, and it ships with the phase-in, deadfront extension, phase insulator, deadfront cover, L-frame deadfront escutcheon, deadfront insulator, label set and 19 screws that fit that bus and deadfront. The ABB unit is an MB Series breaker kit for the ABB ProStack line, so its mounting hardware and deadfront parts are cut for ABB gear. Sub-feed kits are not interchangeable across manufacturers - the kit has to match the panelboard brand and frame size already in the enclosure.
6) Is a 200 kA short circuit withstand rating enough for a high fault-current commercial service?
The kit carries a 200 kA short circuit withstand rating, which is the top end of what is offered on commercial panelboard hardware and covers service locations with high available fault current. The limiting factor on your installation will be the rating of the panelboard and the breaker you pair it with, not this hardware set.
7) What is the exact part number for the Square D L-Frame sub-feed breaker kit?
Order it as Square D N600MPPL. That is the manufacturer part number for the L-Frame sub-feed breaker kit covering 400-600 A NQ and NF panelboards.
8) Is the ABB ProStack MB breaker kit an alternative to the Square D L-Frame sub-feed kit?
Not a substitute. The ABB ProStack MB Series breaker kit is built around ABB's own MB Series panel platform, so it will not mount into a Square D NQ or NF interior. Panelboard accessory hardware is brand and frame specific, so match the kit to the panel already on the wall.
9) What should I order if the panelboard I am adding a sub-feed to is not a Square D NQ or NF?
Match the kit to the panelboard manufacturer and frame. The Square D N600MPPL is engineered for NQ and NF panelboards at 400-600A using an L-Frame configuration, so it is the right choice only when that is what is in the enclosure. For ABB ProStack equipment, the corresponding accessory is an ABB MB Series breaker kit. Confirm the panelboard nameplate for brand, ampere rating and frame designation before ordering either one.
10) Do I need a factory-built panelboard, or can an OEM assemble this in the shop?
Both work. Square D builds the NQ and NF accessory line as factory-assembled, ready-to-assemble kits, so OEM panel shops can drop it in during build and electrical contractors can install it in the field later. Same kit either way.
11) Is the Square D N600MPPL RoHS compliant, and where is it made?
It is RoHS EUR compliant (in scope), mercury free, toxic heavy metal free, and REACH free of SVHC above threshold. Country of origin is Mexico. Those are the specs institutional and government buyers usually need for a submittal package.
How fast can I get the Square D N600MPPL 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 N600MPPL come with a warranty?
Absolutely. The Square D N600MPPL 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 N600MPPL?
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 N600MPPL from ZenSupply?
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