OSHA 30-Hour Construction
Same OSHA — the Occupational Safety and Health Administration. The "30" refers to the 30 hours of training, aimed at whoever holds actual safety responsibility on a crew rather than an individual worker.
All figures editorial estimates. NABCEP and OSHA don't publish per-exam difficulty ratings.
What it is
The deeper counterpart to OSHA 10, covering the same core hazard categories in more depth plus jobsite safety program management. It's built for whoever holds actual safety responsibility on a crew, not just individual hazard awareness.
If you're managing a crew or coordinating subcontractors, OSHA 30 is what most companies expect on top of (not instead of) OSHA 10. It's the standard credential for a site supervisor role in solar construction.
Careers it unlocks
In solar specifically, this credential is most relevant for:
Requirements
- None formally required by OSHA, though most candidates already hold OSHA 10 and are moving into a supervisory or safety-responsible role.
Exam format & passing score
Questions
Module quizzes throughout (roughly 10 questions each) plus a longer final exam covering all 30 hours of content
Time allowed
Minimum 30 hours of coursework, spread across at least 4 days under OSHA's 7.5-hour/day training cap; final exam completion falls within your course access window.
Multiple choice / true-false, delivered entirely online through a DOL-authorized Outreach provider
Passing score : 70% on each module quiz and on the final exam
Same 3-attempts-per-assessment rule as OSHA 10, just applied across more modules given the additional content.
How hard is it
Same 70% threshold and 3-attempt structure as OSHA 10 — still a hazard-awareness and safety-management course, not a technical competency exam — but with three times the content and more nuanced material on running a safety program, not just recognizing hazards individually.
This score is our editorial estimate based on published pass-rate data and requirement complexity — NABCEP and OSHA don't publish an official per-exam difficulty rating.
Cost
Often taken as part of a promotion into a foreman or supervisor role, rather than before hire.
Reimbursement & funding
Because it's usually tied to a promotion or an expanded safety responsibility rather than a condition of entry-level hire, OSHA 30 is frequently covered as part of an employer's leadership-development or tuition-assistance budget.
- Employer-paid, often bundled into a promotion to crew lead or site supervisor.
- Union training funds commonly cover it for members moving into leadership roles.
- WIOA / state workforce funding, less commonly used at this level than for entry-level OSHA 10.
What it pays
Live salary data from current listings on Solar Roles for the roles this credential unlocks:
Get started today
For OSHA 30, HeatSpring uses the same authorized-provider partnership as their OSHA 10 course, so your card is valid nationwide. It's available in Spanish as well as English, with group pricing for companies certifying several supervisors at once.
*Solar Roles may earn a commission if you enroll through this link, at no extra cost to you. See our full, unsponsored comparison of training providers if you'd like to weigh other options.