NEC 90.15: common violations

NEC 90.15 landed in the 2023 cycle and it reshapes how you handle reconditioned gear on the job. The section defines what reconditioning is, when it is permitted, and when it is outright banned. Field crews still get this one wrong, mostly because the rules read like boilerplate until an inspector flags a panel you already energized.

Below are the violations we see most often, what the code actually says, and how to stop eating rework tickets over them.

What NEC 90.15 actually covers

NEC 90.15 establishes the general rules for reconditioned electrical equipment. It defines reconditioning, requires equipment to be suitable for reconditioning in the first place, and points you to the specific articles that prohibit or restrict it. Article 100 gives the formal definition: reconditioning is electrical, mechanical, or both, work done to restore equipment to operating condition. Refurbishing a cord cap is not reconditioning. Rebuilding a 2500A breaker is.

The section works in tandem with the product-specific rules scattered through Chapters 2 through 8. Examples include 240.88 for reconditioned circuit breakers, 404.8 for switches, and 450.15 for transformers. NEC 90.15 is the hook. The downstream articles are the teeth.

Violation 1: installing equipment that cannot be reconditioned

This is the headline failure. Several articles flat-out prohibit reconditioning for specific equipment classes. If you drop in a rebuilt unit where the code says no, it fails inspection no matter how good the work looks.

The prohibited list is longer than most guys realize. Check the article for the gear you are installing before you accept a reconditioned unit on site.

• GFCI devices, per 210.8 and 422.5 scope
• AFCI devices, per 210.12
• Equipment that serves as the sole disconnecting means for certain appliances
• Molded-case circuit breakers rated 600V or less that do not meet 240.88
• Surge protective devices, per 242.8
• Electronic equipment in hazardous locations where the listing does not allow it

If the nameplate says "reconditioned" and the article for that equipment does not explicitly allow it, walk it back to the supply house. Arguing with the AHJ after energizing costs more than the restocking fee.

Violation 2: missing or wrong marking

NEC 90.15(C) requires reconditioned equipment to be marked with the name of the organization that did the reconditioning and the date it was reconditioned. The original listing mark cannot be left alone as if nothing happened. A lot of salvage yards skip this, and the installer takes the hit.

Inspectors are trained to look for three things on reconditioned gear.

1. A marking that clearly identifies the equipment as reconditioned
2. The reconditioner's name or trademark
3. The date the work was performed

If any of these are missing, cite 90.15(C) and reject the equipment at receiving. Do not let it onto the wall.

Violation 3: reconditioned gear in the wrong environment

Some reconditioned equipment is legal in general use but prohibited in specific environments. Hazardous locations under Articles 500 through 516 are the obvious one. Health care facilities under Article 517 have tight rules on essential electrical systems. Emergency systems under Article 700 require listed equipment and reconditioned units often lose that listing unless the reconditioner is recognized by a qualified testing lab.

Before quoting reconditioned switchgear into a hospital, a Class I Division 2 space, or a standby genset feeder, pull the listing documentation. No paper, no install.

Violation 4: treating refurbishment like reconditioning

NEC 90.15(A) draws a line between reconditioning and basic servicing. Replacing a handle, cleaning contacts, changing a coil per the manufacturer's instructions ... that is normal servicing and does not count as reconditioning. Tearing the unit down, replacing internal trip units with non-original parts, or rebuilding the interrupting mechanism does.

Rule of thumb: if the work changes the equipment's electrical ratings or bypasses the original manufacturer's service procedure, it is reconditioning and 90.15 applies.

The reason this matters is liability. If a rebuilt breaker fails to clear a fault and you called it "refurbished" on the job log, your paperwork says you installed unlisted equipment. Get the terminology right on the submittal.

Violation 5: no documentation at the panel

Even where reconditioning is permitted, the AHJ can ask for the reconditioner's qualification records, the test reports, and the listing information. NEC 110.3 still applies. Equipment must be used within its listing and labeling, and a reconditioned unit's listing depends on the reconditioner being recognized for that work.

Keep a job folder with the following for every reconditioned item you install.

• Reconditioner's name, address, and qualification statement
• Date of reconditioning and scope of work performed
• Test reports, primary injection results for breakers, insulation resistance for transformers
• Confirmation the reconditioner is listed by a qualified electrical testing lab or follows NETA MTS/ATS

If you cannot produce those documents at final inspection, expect a correction notice. NEC 90.15 is short, but it opens the door to every product-specific rule that can shut your project down.