OSHA 10 vs OSHA 30: Which Card Opens Which Door

A superintendent asks whether you have your 30 before he will put you on the schedule. Six weeks later, on a different job for the same general contractor, nobody asks for anything but the 10 you have carried since your first year. Both gates were run correctly. Neither man was reading anything OSHA wrote.

That is the part that gets lost in the hour count. The 10 and the 30 are two different courses aimed at two different people, and the entity that will actually turn you away at a gate is almost never the agency whose name is printed on the card.

The federal half of this comes from four documents: the OSHA Outreach Training Program Requirements, the construction and general industry procedures that sit under it, all three revised July 1, 2024 and effective October 1, 2024, and OSHA's Outreach FAQ. All four were opened on August 23, 2026. State rules are quoted separately, with the section number attached, because they are separate law and that distinction is most of the argument below.

The 30 is not the 10 with more hours stapled on

Pull up the construction industry procedures and set the two curricula side by side. The required block, meaning the topics a trainer has no discretion over, does not just get longer. It changes shape.

Falls carry a minimum of 1 hour 30 minutes inside Focus Four in both classes, because, as the procedures put it, most construction fatalities are caused by fall hazards. The other three Focus Four topics get at least 30 minutes each either way.

Look at what the 30-hour adds. Managing Safety and Health may cover job-site inspections, worksite analysis, accident investigations, how to conduct safety meetings, and supervisory communication. Its elective list carries one entry the 10-hour list does not: Foundations for Safety Leadership, with a floor of 2 hours 30 minutes rather than the usual 30. Those are not deeper versions of hazard awareness. They are the work of running a crew.

General industry splits the same way. The general industry procedures put six one-hour topics in the 10-hour required block. The 30-hour required block runs 12 hours, adds the same Managing Safety and Health module for 2 hours, doubles Exit Routes and Electrical to 2 hours each, and pulls Materials Handling off the elective list into the required block at 2 hours. Its elective requirement is 10 hours across at least five topics.

One ceiling applies to both. A trainer may not spend more than four hours on any single topic in a 10-hour class, or more than six in a 30-hour class, unless the procedures for that industry permit otherwise. A 30-hour class cannot be six hours of scaffolds and a shrug.

OSHA wrote one sentence about who each class is for, and then stopped

The agency's Outreach FAQ answers the question directly: "The 10-hour class is intended to provide workers with awareness of common job-related safety and health hazards, while the 30-hour class is more appropriate for supervisors or workers with some safety responsibility."

More appropriate. Not required of. The procedures use the same register, describing the 30-hour program as "intended to provide a variety of training to workers with some safety responsibilities."

Three more lines are worth knowing before you argue with anyone about a card. An OSHA card "is not considered a certification or license." The program is voluntary, and the construction procedures state that "the federal government does not mandate OSHA Outreach Training Program participation." And outreach training satisfies nothing: employers remain responsible for training workers on the specific hazards of their job under the standards themselves, listed in OSHA Publication 2254. If your job requires a competent person for excavations or scaffolds, a 30-hour card is not that, and never was.

There is a related trap for anyone eyeing the trainer path. The construction procedures say plainly that "the 30-hour construction Outreach class is not considered equivalent to the OSHA #510 Occupational Safety and Health Standards for the Construction Industry." The 30-hour is hazard-based and taught by an authorized trainer. The #510 is a standards course offered only through OTI Education Centers, and it is the prerequisite that, with five years of construction safety experience and the #500, makes you a trainer.

Nevada writes the 30 into its statute, and picks by authority

Most of the mandates you will meet name the 10. Nevada names both, and decides which one is yours by your authority rather than your trade.

Under NRS 618.983, a construction worker other than a supervisory employee must obtain an OSHA-10 completion card not later than 15 days after being hired, and a supervisory employee must obtain an OSHA-30 card on the same 15-day clock. NRS 618.987 puts the consequence on the employer in the imperative: if the worker fails to present a current and valid card by that deadline, "the employer shall suspend or terminate his or her employment." NRS 618.990 prices the failure at up to $500 for a first violation, up to $1,000 for a second, and treats the third as a willful violation. Any number of violations found in a single day counts as one.

Two definitions decide which card is yours. NRS 618.957 defines a construction worker as a person who actually performs physical work at a construction site, or "who supervises any person engaged in work described in paragraph (a)" — so a foreman is a construction worker, not an exception to the chapter. The same section carves out upkeep: work on a property that already holds a certificate of occupancy, done to keep it from degrading or to replace components with the same or similar ones, is maintenance rather than construction, and whoever performs or supervises it falls outside the definition. NRS 618.967 then defines a supervisory employee by authority: to hire, transfer, suspend, lay off, recall, promote, discharge, assign, reward or discipline other employees, or responsibility to direct them, where the exercise of that authority "is not of a merely routine or clerical nature but requires the use of independent judgment." It adds a threshold most summaries drop. That authority does not put you in supervisory status "unless the exercise of such authority occupies a significant portion of the employee's workday."

Nevada runs the same structure outside construction, and the industry version changes with it. For the entertainment industry, NRS 618.9902 and 618.9903 define the courses as general industry courses. For convention services, NRS 618.9921 and 618.9922 accept either "construction industry or general industry." Both subchapters exclude volunteers and anyone not paid to work at the site, and both put a clock on the card that the construction sections never mention. NRS 618.9911 for entertainment and NRS 618.9929 for convention services each say a completion card used to satisfy that section expires five years after it is issued, renewable either by sitting the course again within the previous five years or by showing the Division job-specific continuing education from that period: at least 5 hours behind a 10-hour card, at least 15 hours behind a 30-hour one. Nothing in NRS 618.983 or 618.987 expires a construction card, and the federal card is printed without a date at all, so a construction worker in Nevada is not on a five-year clock because of these sections.

On public work, "at least ten hours" and "the ten-hour program" are not the same phrase

Several states require the 10 on publicly funded construction. The thresholds and the wording differ, and the wording is where a 30-hour card either counts or does not.

New York is the generous version. Labor Law 220-h reaches every public work contract with the state or a municipality "where the total cost of all work to be performed under the contract is at least two hundred fifty thousand dollars," and requires that all laborers, workers and mechanics on the site "shall be certified prior to performing any work on the project as having successfully completed a course in construction safety and health approved by the United States department of labor's occupational safety and health administration that is at least ten hours in duration." At least ten hours. A 30-hour construction card clears that on its face.

Missouri words it as a named program. The Division of Labor Standards publishes the contract language itself on form PW-5, the Public Body Check-Off List, which instructs public bodies to insert a statement that the contractor and all subcontractors "must require all on-site employees to complete the ten-hour construction safety training program required under Section 292.675, RSMo, unless they have previously completed the program and have documentation of having done so." The same form carries the penalty clause: $2,500 to the contracting public body plus $100 for each employee, for each calendar day or portion of one, that the employee works without the training.

I would have assumed the longer card satisfies the shorter requirement everywhere, and those two sentences are why I no longer would. One sets a floor. The other points at a named program. Connecticut, New Hampshire and Rhode Island each attach their own threshold and conditions on top, and Connecticut adds a refresher obligation for some trades that has nothing to do with the federal card. Where the wording names a program rather than a minimum duration, get the awarding body's answer in writing before you show up with the card you would rather use.

Two calendar days, or four

The class length is not a scheduling suggestion. Training is capped at 7.5 student contact hours per calendar day, which the Outreach Training Program Requirements turn into a hard floor: "10-hour classes must take a minimum of two calendar days" and "30-hour classes must take a minimum of four calendar days."

Contact hours mean time on course content. Meals, breaks, roll call and optional tests do not count, and testing is not required at all. Video cannot exceed 25 percent of instructional time. A trainer may break the class into segments of at least 30 minutes each, delivered over days or weeks or months, provided the whole thing closes within 180 calendar days of the start date, unless the Authorizing Training Organization grants a written exception to that duration requirement.

Online is a shorter list than most people expect, and it gets shorter for the 30. On OSHA's roster of authorized online providers, construction 10-hour has eight, construction 30-hour has six, general industry 10-hour has seven, and general industry 30-hour has four. OSHA's own caution on that page is the one to remember: it "cannot validate training offered by vendors other than those listed below."

Upgrading from 10 to 30 costs you the card in your wallet

If you already hold a 10-hour card and a promotion or a Nevada job puts a 30 in front of you, there is a bridge. Section V.F.9 lets a trainer deliver 20 additional hours to 10-hour students. Three conditions attach, and the third one surprises people.

The same trainer has to conduct both the initial 10-hour training and the additional 20. All of it, from the start of the 10-hour class to the end of the 30-hour class, must be complete within 180 calendar days. And the original 10-hour card goes back: "The original 10-hour card must be returned to the ATO for the student to receive the 30-hour card. If the 10-hour card is not available or returned to the ATO, a 30-hour card will not be issued to the trainer."

So the bridge is only open to someone who took the 10 recently, from a trainer still reachable, and who can produce the physical card. Miss any of those and you sit the full 30.

One more line protects you regardless of which class you sit. Trainers must issue completion cards within 90 calendar days of the course end date, and must issue them "directly to the student, regardless of who paid for the training." If your employer booked the class, the card is still yours and it goes to you, not into a folder in the trailer.

The demand has an author, and the author has a document

When a gate, a contract or a hiring manager asks for a 30, the useful question is not which class is better. It is who wrote the requirement. OSHA hands that decision away in its own FAQ: some states have enacted laws mandating the training, and "some employers, unions, organizations or other jurisdictions may also require this training." Ask for the citation. A statute section, an ordinance number, a specification paragraph, a contract article. Whoever is asking can name it, and once you have the wording you can see whether it says thirty hours, ten hours, at least ten hours, or a named program.

Then keep the proof where you can reach it. Photograph both sides of the card and write down the trainer's name, contact information and Authorizing Training Organization, because those are what any later verification runs on. Class hours, incidentally, are not the hours a licensing board counts toward a journeyman ticket; that ledger has its own definition of supervised work, laid out in what counts as an OJT hour. The other cards in the same wallet run on clocks of their own, sorted in EPA 608 never expires, and four cards that do. And an outreach card crosses a state line in a way your license does not, which is the problem described in electrician license reciprocity.