Square D NF Panelboard Backfed...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$433.71
Square D NF Panelboard Backfed Main Breaker Barrier, UL Service Entrance

Square D NF Panelboard Backfed Main Breaker Barrier, UL Service Entrance

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Model: NFEDBS

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

$433.71
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Square D NF Panelboard Backfed Main Breaker Barrier, UL Service Entrance

The Square D NF Panelboard Backfed Main Breaker Barrier is a UL Listed safety accessory engineered for backfed main circuit breaker configurations on NQ and NF panelboards. This service entrance rated barrier is part of Square D's modular NQ/NF accessory lineup, which features a wide selection of circuit breakers, accessories, and ready-to-install kits so contractors, OEMs, and end users can field-install exactly the components a job requires. Built to support code-compliant, professional electrical distribution work.

Key Features

  • Safety Accessory: Purpose-built barrier for backfed main circuit breaker applications, supporting UL service entrance compliance on NQ and NF panelboards.
  • Modular Compatibility: NQ and NF Panelboards offer a wide selection of accessories and replacement parts, allowing this barrier to be field installed into existing panelboard setups.
  • Design Flexibility: Factory assembled options allow design flexibility and maximize job productivity.
  • Easy Modification: Easy to modify or extend the use of the panelboard as system requirements change.
  • Load Center Type: Main breaker configuration accessory.
  • Packaging: Supplied 1 ea per package for straightforward job-site handling.

Certifications & Compliance

  • UL Listed
  • Mercury Free
  • Toxic Heavy Metal Free
  • ROHS Eur Compliant

Technical Specifications

  • Toxic Heavy Metal Free: Yes
  • Sustainable Packaging: No
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: No
  • Tier Id: 3
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • China ROHS Label: 1
  • Use Carbon Footprint: 0
  • With Recycled Cardboard: Yes
  • WEEE Product Category: 4
  • China ROHS In Scope: No
  • Return Indicator: Y
  • Take Back: No
  • Tier: 3
  • Returnability: Yes
  • H And D Subrange: COM
  • Reach Free Shvc: Yes
  • WD Status: L - LOB initialized
  • Green Premium Status For Reporting: Green Premium product
  • Country of Origin: Mexico
  • Legacy WEEE Scope: In
  • China ROHS Regulation: Pro-active China RoHS declaration (out of China RoHS legal scope)

Typical Applications

  • Commercial and Industrial Panelboard Installations
  • Service Entrance Equipment Upgrades
  • NQ and NF Panelboard Retrofits
  • Backfed Main Circuit Breaker Configurations
  • Commercial Electrical Distribution Systems

Why Square D?

Square D backs the NQ and NF panelboard accessory line with UL Listed certification, Mercury Free and Toxic Heavy Metal Free construction, and ROHS Eur compliance, giving contractors and OEMs a dependable, code-compliant option for service entrance and backfed main breaker configurations. Modular, factory-assembled compatibility with existing NQ and NF panelboards means faster installation and long-term flexibility as job requirements evolve.

Manufacturer Resources

Product Specs

Product Type:
Panelboard Accessory
Listing:
UL Listed
Configuration:
Service Entrance Barrier
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Panelboards & Load Centers

Square D NFEDBS – Frequently Asked Questions

1) What does the Square D NFEDBS barrier actually do in a backfed main breaker panelboard?
The NFEDBS is a service entrance barrier for panelboards wired with a backfed main circuit breaker. In that arrangement the branch-mounted breaker feeds the bus from the line side, so the bus and the breaker's line terminals stay energized ahead of the main. The barrier isolates and shields that always-live service entrance section so the installation can meet UL service entrance requirements. It is a UL Listed accessory, supplied one per package.
2) Will the NFEDBS barrier fit an NQ panelboard, or is it NF only?
Both. The barrier is part of Square D's NQ/NF accessory line and is specified for backfed main breaker configurations on NQ and NF panelboards, despite the NF prefix in the part number.
3) Can this barrier be added to a panelboard that is already installed, or does it have to be ordered with the panel?
It can be field installed. Square D's NQ/NF accessory program is modular, so the NFEDBS barrier goes into existing panelboard setups as a retrofit when a branch breaker is being converted to a backfed main. Factory-assembled options exist as well if you are specifying a new panel.
4) Do I need a barrier kit if I use a branch breaker as the main in a Square D NF panel?
Yes, a backfed main breaker has to be secured and the energized service entrance section guarded, and the NFEDBS is the Square D accessory made for that on NQ and NF panelboards. Without it the backfed arrangement is not a UL service entrance configuration.
5) Will this Square D barrier work on an Eaton or ABB panelboard?
No. The NFEDBS is built for Square D NQ and NF panelboards only. For other makes you need that manufacturer's own accessory, for example ABB's THQC series hardware or Eaton's Pow-R-Stock accessories for PRL panels. Barriers and mounting parts are not interchangeable across panelboard brands.
6) What is the exact part number to order for the Square D NF backfed main breaker barrier?
Order Square D NFEDBS. That is the single model on the barrier, so there are no finish, size, or voltage options to pick, and it ships one per package.
7) Is the NFEDBS barrier a panel rating kit, or something different?
Different part, different job. The NFEDBS is a physical service entrance barrier for a backfed main breaker. A series rating kit, such as the Eaton Pow-R-Stock Series Rating Kit for PRL1X/2X and PRL1A/2A panels, is a labeling and documentation kit that establishes series short circuit ratings. And an accessory like the ABB THQC 1-Pole Front Mounting Plate is breaker mounting hardware, not a barrier. If the inspector is asking for backfed main guarding on an NQ or NF panel, the barrier is the part.
8) Is the ABB THQC 1-pole front mounting plate an alternative to the Square D NFEDBS barrier?
They are not interchangeable. The ABB TQCFMP1 is a 1-pole front mounting plate in the THQC series, used to mount a breaker at the panel front. The Square D NFEDBS is a service entrance rated barrier for backfed main circuit breaker arrangements in NQ and NF panelboards. One positions a breaker, the other provides the barriering a backfed main installation needs, so a job calling for service entrance compliance on an NQ or NF panel needs the NFEDBS.
9) We standardize on one panel brand across our facilities - does choosing the Square D NFEDBS lock us into NQ and NF panelboards?
Yes, in practice. The NFEDBS barrier is part of Square D's modular NQ and NF accessory line and is field installed into those panelboards for backfed main service entrance work. Equivalent accessories from other brands are tied to their own panel families - for example the Eaton SRK is specified for PRL1X/2X and PRL1A/2A panels, and ABB's TQCFMP1 mounting plate belongs to the THQC series. For an MRO program, that means the barrier should be ordered to match the panelboard family already installed rather than treated as a universal part.
10) Does the NFEDBS barrier meet RoHS and environmental requirements for government or institutional purchasing?
It is a Square D Green Premium product, mercury free, toxic heavy metal free, and ROHS Eur compliant, and it is UL Listed. It ships in recycled cardboard. Country of origin is Mexico, which matters if your project carries domestic or trade-preference sourcing language.
How fast can I get the Square D NFEDBS 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 NFEDBS come with a warranty?
Absolutely. The Square D NFEDBS 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 NFEDBS?
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 NFEDBS from ZenSupply?
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