How to Check a Certification Listing
Why this matters
Everybody looks at the mark. Almost nobody checks it, and the two are not the same activity: the mark tells you a certification is claimed, and the check tells you whether one exists, what it covers, and whether it covers what you are about to do. The check takes minutes and the failure takes days, because a rejected inspection is a return trip plus a place in the re-inspection queue, and both of those are measured in working days rather than in hours of labor. The steps below run cheapest first, so most checks end at step 3 and the expensive ones are the only ones that ever reach the bottom.
Step 1: Transcribe the mark completely, not the part of it you recognize
Photograph it, then write down every element that is present:
- The certifying organization's identifier
- A control number, file number, or report number, whatever it is called on that mark
- A standard designation, when one is shown
- Any category wording printed with the mark
- Whether the mark indicates a full product certification or a component recognition
- The product identity next to it: model or catalog number, and the company name shown as the manufacturer
The control number is the field people skip and the one the whole lookup turns on. Model strings get reused across generations and get re-issued after redesigns. A control or file number points at a certification record.
Step 2: Decide which of three questions you are actually answering
They have different answers and different evidence, and mixing them up is why checks come back inconclusive.
Does a certification exist for this product? Answered by the certifier's records.
Does that certification cover the use I am putting it to? Answered by the listing category and its conditions, not by the existence of the record.
Is the certifier recognized for this standard? Relevant where the equipment is workplace electric equipment, since 29 CFR 1910.303(a) requires such equipment be approved and 29 CFR 1910.7 sets out the recognition program under which a laboratory is recognized for a specific list of test standards.
Step 3: Search the certifier's public certification directory
Certification bodies publish searchable directories of what they have certified. Search in this order, because it goes from unique to ambiguous:
- By control or file number. Unique, and it lands you directly on the record.
- By model or catalog number. Works, but expect multiple hits across generations.
- By company name. Last resort, and it produces long lists you then have to filter.
Then match on four fields before you accept the record: the certifying organization matches the mark, the product identity matches the item in your hand, the listing category describes the use you intend, and the standard is the one appropriate to that category.
A partial match is a miss. Three of four fields agreeing is not a certification for the item in your hand, it is a certification for something near it.
Step 4: Read the category description, not just the fact of the record
The category is the payload. It names what the product was certified as, which is the question that decides whether your application is inside the certification or outside it while the mark stays perfectly genuine.
If the record is a component recognition rather than a product listing, the conditions of acceptability are part of it: the enclosure it must be installed in, the temperature limits, the supply, the spacing. Those conditions become requirements on whatever assembly the component ends up in, and nobody else in the chain is going to read them for you.
Step 5: Escalate only if steps 3 and 4 do not resolve it
Costs go up sharply from here, which is why this is not step 2.
Manufacturer's certification record. The manufacturer can supply the certification documentation for a product they build. Turnaround is typically a day or more, so this is where a check stops being something you do standing at the truck.
The certifier directly. Slower again, and appropriate when the record and the mark disagree rather than when you simply cannot find the record.
Field evaluation. For equipment that is unlabeled, modified, or otherwise unlisted, a field evaluation by a qualified field evaluation body can produce a field label. NFPA 790 sets the competency requirements for third-party field evaluation bodies and NFPA 791 gives the recommended practice and procedures for evaluating unlabeled electrical equipment. The authority having jurisdiction still decides whether to accept the result, because approved means acceptable to the AHJ.
The AHJ conversation. Worth having before the field evaluation rather than after, since the AHJ is the party whose acceptance the whole exercise is aimed at.
Step 6: Record the check where somebody else can find it
Date, what you searched, which field you searched on, what you found, and a screenshot or photograph of the record. An undocumented check has to be repeated by the next person, and at an inspection the difference between "we checked" and a dated record with a control number on it is the difference between a discussion and a finding.
Two lookups on the same visit, resolving opposite ways
Commercial job with an inspection at the end. Two replacement items from truck stock, checked before either went in.
First item. Mark carries a certifier identifier, a control number, and an indication that it is a recognized component rather than a fully listed product. Directory search by control number returns a record immediately. The listee named in the record is a different company than the brand printed on the part, which is a legitimate private-label arrangement and is accounted for in the record itself, so that discrepancy resolves rather than failing the check.
What fails the check is step 4. The record's category is a component category, with conditions of acceptability that assume factory incorporation into an end product and a specified enclosure. The item is being used here as a standalone field replacement in equipment where the inspector will look, which is outside the terms of the recognition. Not a counterfeit mark, not an expired record, not a mismatch: a genuine certification that does not cover this use. The part goes back in the truck and the product-listed equivalent gets sourced.
Second item. Same procedure, and the record returns a product-level listing in a category that describes exactly this application, with the standard named. The certifier appears in OSHA's list of recognized laboratories as recognized for that standard, which matters here because this is workplace electric equipment and 1910.303(a) requires it be approved. Four fields matched, category correct, recognition scope correct. It goes in, and the record goes in the job file.
Both lookups together ran about 0.2 hours of absorbed effort. Against that: a rejected inspection on this job means a return trip and a place in the re-inspection queue, which in scheduling terms is measured in working days rather than in hours. That is not a ratio you can state as a number, because the two things are not the same unit, and treating a queue delay as if it were labor hours is how a real comparison turns into a false one. What can be said plainly is that the check is the cheaper of the two in both units.
Four ways a check goes wrong
A mark that is not a third-party certification at all. Some marks signify a manufacturer's own declaration of conformity to a region's requirements rather than an independent evaluation. A self-declared conformity mark is not a third-party listing and is not a recognized certification for United States workplace purposes, and it appears on plenty of equipment that arrives on job sites.
A genuine certifier's mark outside that certifier's recognized scope. The laboratory is real and recognized, just not for the standard in question. This is only visible if you check the scope, which is why step 2 separates that question out.
A private-label mismatch treated as a fake. The brand on the product differing from the listee in the record is normal in private-label arrangements and is documented in the record. Look for the arrangement before concluding anything.
A control number that resolves to a nearby product. The most dangerous outcome, because it produces a record, and a record feels like a result. This is what the four-field match in step 3 exists to catch.
Confirming the check itself
Two questions, and they are the ones that separate a check from a glance.
Can you name the category the product was certified in, in the certifier's own words? If your answer is that it is certified, you completed step 3 and skipped step 4, which is where the actual coverage question lives.
If somebody asked you tomorrow, could you produce the record? If the answer depends on redoing the search, the check exists only in your memory, and at an inspection your memory is not evidence.
References
- 29 CFR 1910.303(a), requiring electric equipment to be approved, and 29 CFR 1910.7, the criteria and scope of recognition for nationally recognized testing laboratories
- NFPA 70 (National Electrical Code), Article 100 for the definitions of listed, labeled and approved
- NFPA 790, competency of third-party field evaluation bodies; NFPA 791, recommended practice and procedures for unlabeled electrical equipment evaluation
- Certification body public directories and manufacturer certification records, which are the sources searched in steps 3 and 5
- See related: What a Listing Mark Means and What It Does Not