Trades Navigator summarizes state licensing rules from the state board. We do not characterize the rules, order classes against each other, or combine them into a single number. Each license class links to the issuing authority for primary-source verification.
Scope of Work
Chief Engineer is Minnesota's top operator credential. Grade A, B, and C variants exist per Minn. R. 5225, distinguished by plant pressure and presence of steam engines/turbines. Chief Grade A authorizes the highest range of high-pressure plants with engines or turbines; Chief Grade C covers low-pressure boiler plants. Source: Minn. R. 5225.0550 (https://www.law.cornell.edu/regulations/minnesota/Minn-R-5225-0550).
Experience and Training
Five years (at least 10,000 hours; one year = 2,000 hours per rule) of operating experience on a boiler of proper size, including at least one year as a licensed First Class Engineer. Grade A requires at least 2 years of the qualifying experience on engines or turbines. Source: Minn. R. 5225.0550.
Verified May 1, 2026 · compiled from public sources, verify current rules with Minnesota Department of Labor and Industry — Construction Codes and Licensing Division before acting
Experience and Training
Three years (at least 6,000 hours; one year = 2,000 hours per rule) of operating experience on a boiler of proper size. Grade A: of those three years, at least 2 years must be on high-pressure boilers with steam engines or turbines. Source: Minn. R. 5225.0550.
Verified May 1, 2026 · compiled from public sources, verify current rules with Minnesota Department of Labor and Industry — Construction Codes and Licensing Division before acting
Experience and Training
Minimum 25 hours of supervised experience on a steam traction engine or hobby boiler.
Verified May 1, 2026 · compiled from public sources, verify current rules with Minnesota Department of Labor and Industry — Construction Codes and Licensing Division before acting
Scope of Work
Second Class Engineer authorizes operation of boilers within the scope defined by Minn. R. 5225 (low and intermediate pressure plants per the rule's grading). Minnesota Second Class license can be issued in Grades A, B, or C depending on plant pressure and equipment. Source: Minn. R. 5225.0550 (https://www.law.cornell.edu/regulations/minnesota/Minn-R-5225-0550).
Experience and Training
One year (at least 2,000 hours) of operating experience on a boiler of proper size. Grade A requires the year to be on a high-pressure boiler with steam engine or turbine operation. Source: Minn. R. 5225.0550.
Renewal
Editor must confirm current cycle and CE requirement against DLI renewal notice.
Verified May 1, 2026 · compiled from public sources, verify current rules with Minnesota Department of Labor and Industry — Construction Codes and Licensing Division before acting
Experience and Training
No prior experience required; only a signed application form. Source: Minn. R. 5225.0550.
Renewal
Editor must confirm current cycle and CE requirement against DLI renewal notice before public launch.
Verified May 1, 2026 · compiled from public sources, verify current rules with Minnesota Department of Labor and Industry — Construction Codes and Licensing Division before acting
Free educational resource. Not legal, financial, or career advice. Trades Navigator compiles state board rules, statutes, and federal data into a navigable layer linked to primary sources. We do not maintain editorial attestation on each line. Always verify the specific number, fee, deadline, or rule against the linked primary source before relying on it. Confirm any decision with the relevant state agency, a lawyer, or an accountant.
Correction reports open at launch (target May 2026).