NEC 90.15: inspector tips

What 90.15 Actually Covers

NEC 90.15 was added to the 2023 Code to put reconditioned equipment on the map at the front of the book. Before this, rules were scattered across Article 110 and individual equipment articles. Now Article 90 gives the general permission, and other articles carve out the exceptions.

The rule is simple in structure. Reconditioned equipment is generally permitted, provided it is marked per 110.21(A)(2) and is not specifically prohibited elsewhere in the Code. That last clause is where inspectors focus, because the prohibitions are spread across roughly a dozen articles.

If you run service upgrades, industrial retrofits, or anything involving switchgear swaps, 90.15 is now part of your job walk. Know what you can put back in and what you cannot.

The Marking Requirement You Cannot Skip

Per 110.21(A)(2), reconditioned equipment must be marked with the name, trademark, or other descriptive marking of the organization responsible for the reconditioning, along with the date. The original listing mark from the manufacturer does not cover the rework. If the reconditioner is not the original manufacturer, that has to be clear on the label.

Inspectors will lift covers and look for this marking. A missing or ambiguous recon label is the fastest way to get red-tagged on a switchgear install. Verify the label before it goes on the wall, not after.

Field tip: photograph the recon label and the nameplate together before you set the gear. If the AHJ questions it later, you have date-stamped proof of what was installed.

Equipment That Cannot Be Reconditioned

Article 90.15 defers to other articles for prohibitions. These are the ones that come up most on inspections. Know them cold.

• GFCI devices per 210.8 related sections, because the internal electronics cannot be verified post-rework.
• AFCI devices per 210.12, same reasoning.
• Molded-case circuit breakers that have interrupted a short-circuit at or near their rating per 240.87 and manufacturer instructions.
• Meter socket enclosures per 312.100 in many jurisdictions.
• Hermetic refrigerant motor-compressors per 440.4(C).
• Equipment submerged in water, including panelboards and breakers, per 110.14 and various product standards.
• Fuses that have operated are never reusable per 240.60 principles.

When in doubt, check the specific equipment article in Chapters 3 through 7. If it says "shall not be reconditioned," that is absolute. No AHJ variance gets around a Code prohibition.

Inspector Red Flags on the Walkthrough

Inspectors are trained to spot recon work quickly. Scratches on enclosure paint, mismatched screw heads, factory stickers that look aged against newer labels, and breaker handles with uneven wear all raise questions. On large switchgear, they will often ask for a copy of the reconditioning report.

If the gear came through a used-equipment broker, get documentation up front. A clean paper trail from the rework facility, including test results like hipot, insulation resistance, and primary injection on breakers, settles most disputes before they start.

Common red flags on a job walk:

1. Recon label present but no date, or a date older than the relevant listing standard edition.
2. Original manufacturer label removed or painted over.
3. Reconditioned GFCI or AFCI breakers installed where 210.8 or 210.12 apply.
4. Field-modified buswork that is not part of the documented rework.
5. Torque markings missing on lugs that were disassembled during the recon.

Documentation That Keeps You Out of Trouble

For any reconditioned gear over 600 amps, or any medium-voltage equipment, keep a job folder. Include the recon facility's test report, the 110.21(A)(2) marking photo, and manufacturer correspondence confirming parts used were original or equivalent.

On service equipment, the utility inspector and the AHJ electrical inspector may both want to see records. Utility cares about the meter socket and service disconnect condition. The AHJ cares about everything downstream. Duplicate your paperwork so you can hand off the same packet twice without scrambling.

Field tip: staple the recon report to the inside of the panel door with the panel schedule. Next inspector, next service call, next owner... the record stays with the gear.

How 90.15 Interacts With 110.21 and 110.3

90.15 gives general permission. 110.21(A)(2) dictates how the work is marked. 110.3 tells you the gear must be used per its listing and labeling. Together they form the chain: reconditioned, properly marked, installed per instructions.

Break any link and the install fails inspection. A reconditioned panel with correct marking still fails if it is installed outside the instructions the recon facility provided. Read the recon documentation before setting the gear. The torque values, permitted accessories, and environmental limits may differ from the original spec sheet.

Check your edition. If the AHJ is enforcing the 2020 NEC or earlier, 90.15 does not exist in that code cycle, and the rules live under 110.21(A)(2) and the individual equipment articles. The substance is similar, but the citation you put on a correction notice has to match the adopted code.

Quick Field Checklist

Before you energize reconditioned gear, run through this short list. It covers most of what trips inspections in the field.

• Verify 110.21(A)(2) marking is legible and dated.
• Confirm the equipment type is not on a no-recon list per its governing article.
• Pull test reports from the recon facility and keep a copy on site.
• Torque all lugs to the recon facility's spec, mark with torque seal, and log values.
• Photograph nameplates, recon labels, and final terminations before closing covers.
• Confirm the adopted code cycle in the jurisdiction before citing 90.15 in any correspondence.

Treat reconditioned gear like new gear with extra paperwork. The install practices do not change. The documentation burden does. Build the habit on the first job and it becomes routine on the rest.