FM 3990

For FM 3990, laboratory is FM Approvals; standard title is Less or nonflammable Liquid-Insulated Transformers, verified against its source on 2026-08-10.

Laboratory: FM Approvals verified
Standard number: FM 3990 verified
Standard title: Less or nonflammable Liquid-Insulated Transformers verified

Sourceosha.gov

Verified2026-08-10

Review by2026-12-08

DatasetWhich OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

What the source says

FM 3990 | Less or nonflammable Liquid-Insulated Transformers |

— osha.gov, retrieved 2026-08-10

Source

osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/fm

Last verified against source: 2026-08-10. Due for re-check by 2026-12-08. This page as Markdown · OKF bundle · full dataset as JSON.