Square D NF H/J-Frame Main Cir...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$560.83
Square D NF H/J-Frame Main Circuit Breaker Barrier, UL Service Entrance

Square D NF H/J-Frame Main Circuit Breaker Barrier, UL Service Entrance

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Model: NFHJLLC

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

$560.83
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Square D NF H/J-Frame Main Circuit Breaker Barrier, UL Service Entrance

The Square D NF H/J-Frame Main Circuit Breaker Barrier is a panelboard accessory engineered for Square D's NQ and NF panelboards, providing a UL Listed service entrance barrier for main circuit breaker installations. Built with the same modular construction as the NQ and NF panelboard line, this barrier installs in the field to convert or upgrade an existing panelboard without a full panelboard replacement. Each set ships 2 pieces per set, packaged 1 ea, giving electricians and contractors a straightforward path to service entrance compliance.

Key Features

  • UL Service Entrance Barrier: UL Listed main circuit breaker barrier designed for NF H/J-Frame panelboards used at service entrance locations.
  • Modular Construction: Field-installable accessory design lets contractors add or convert panelboard accessories on-site without swapping the entire panelboard.
  • Factory-Assembled Options: Factory assembled options allow design flexibility and maximize job productivity.
  • Ready-to-Install Kits: Ready to assemble kits and accessories support on-site design changes.
  • Extensible Design: Easy to modify or extend the use of the panelboard as electrical needs change.
  • Set Quantity: Includes 2 pieces per set, packaged 1 ea for convenient stocking and installation.

Certifications & Compliance

  • UL Listed
  • RoHS EUR Compliant
  • Mercury Free
  • Toxic Heavy Metal Free

Technical Specifications

  • Warranty: 18 months
  • Product Certifications: UL
  • Toxic Heavy Metal Free: Yes
  • Mercury Free: Yes
  • Country of Origin: Mexico
  • Returnability: Yes

Typical Applications

  • Commercial and Industrial Panelboard Installations
  • Service Entrance Rated Electrical Systems
  • NQ and NF Panelboard Upgrades and Conversions
  • Main Circuit Breaker Retrofits
  • Renovation and New Construction Electrical Projects

Why Square D?

Square D backs this NF H/J-Frame service entrance barrier with UL Listing, an 18-month warranty, and modular construction that fits directly into the established NQ and NF panelboard platform. For contractors and OEMs, that's a reliable, code-compliant accessory that's easy to stock, install, and support across commercial panelboard projects.

Manufacturer Resources

Product Specs

Product Type:
Panelboard Accessory
Series:
NF
Configuration:
H/J-Frame Service Entrance Barrier
Listing:
UL Listed
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Panelboards & Load Centers

Square D NFHJLLC – Frequently Asked Questions

1) What does the Square D NFHJLLC barrier actually do in a panelboard?
The NFHJLLC is a main circuit breaker barrier for Square D NF H/J-Frame panelboards. It isolates the line side of the main breaker so the panelboard can be used at a service entrance location, which is what UL requires when the enclosure contains service conductors. It is a barrier only, not a breaker, not an interior, and not a mounting kit.
2) Will the NFHJLLC barrier work in an NQ panelboard or only NF?
Square D lists this barrier for its NQ and NF panelboards, and the frame call-out is H/J, so the main breaker in the can has to be an H-frame or J-frame unit. If your main is a different frame size, this is not the barrier for it.
3) Can I add a service entrance barrier to a panelboard that's already installed, or do I have to replace the panel?
No panel swap needed. The barrier is a field-installable accessory built on the same modular platform as the NQ and NF panelboards, so an existing panelboard can be converted or upgraded on site for service entrance use.
4) Is the Square D NF service entrance barrier UL Listed for inspection sign-off?
UL Listed, yes. That listing is the point of the part: a panelboard used as service equipment needs the line-side barrier to be a listed component of that panelboard, and this is Square D's listed barrier for the NF H/J-Frame main. It is also RoHS compliant, mercury free, and free of toxic heavy metals.
5) Can an Eaton Pow-R-Stock series rating kit be used in place of the Square D NFHJLLC barrier?
No. The Square D NFHJLLC is an H/J-Frame service entrance barrier for Square D NF panelboards, supplied 2 pieces per set and UL Listed for main circuit breaker service entrance use. The Eaton SRK is a Pow-R-Stock series rating kit built for Eaton PRL1X/2X and PRL1A/2A panel systems, a different manufacturer's platform and a different purpose - series rating documentation rather than a physical service entrance barrier. For an NF panelboard with an H- or J-Frame main, stay with the NFHJLLC.
6) We need to bring an existing panelboard up to service entrance - do we replace the panel or add an accessory?
On a Square D NF panelboard with an H- or J-Frame main, the NFHJLLC barrier is a field-installable accessory that converts or upgrades the existing panelboard without a full panelboard replacement, and it is UL Listed for service entrance use. It ships 2 pieces per set. Note that accessories are platform-specific: an ABB THQC front mounting plate or an Eaton Pow-R-Stock series rating kit for PRL1X/2X and PRL1A/2A panels will not serve this function on an NF panelboard.
7) How many pieces come in a Square D NFHJLLC barrier kit?
Two pieces per set, packaged one each. Order one NFHJLLC per main breaker position you are barriering, not two.
8) I need a rating kit or mounting plate for my panel, not a barrier. Is this the right part?
No. The NFHJLLC does one job, barriering the line side of an H/J-Frame main in a Square D NF panelboard. For a series rating kit on Eaton Pow-R-Line gear, the Eaton Pow-R-Stock series rating kit for PRL1X/2X and PRL1A/2A panels is the part type you want. For mounting a breaker on an ABB THQC panel, that's the ABB THQC 1-pole front mounting plate. None of the three substitute for each other.
9) Is the ABB THQC front mounting plate an alternative to the Square D NF H/J-Frame breaker barrier?
They are not interchangeable. The ABB TQCFMP1 is a 1-pole front mounting plate in ABB's THQC series, used to mount a single-pole breaker in an ABB enclosure. The Square D NFHJLLC is a UL Listed main circuit breaker barrier for NF panelboards at service entrance locations, shipped as a 2-piece set and sized for H- and J-Frame mains. Different manufacturer, different breaker frame, and a barrier function rather than a mounting plate.
10) Is there more than one version of the NF H/J-Frame barrier to choose from?
One part number covers it: NFHJLLC. There are no finish, size, or handing options to specify, so the only thing to confirm is that your panelboard is an NF or NQ with an H-frame or J-frame main.
11) Where is the Square D NFHJLLC barrier made?
Mexico. Useful if you're filing country-of-origin documentation on a government or institutional job.
How fast can I get the Square D NFHJLLC 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 NFHJLLC come with a warranty?
Absolutely. The Square D NFHJLLC 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 NFHJLLC?
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 NFHJLLC from ZenSupply?
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