What transformer oils are FM approved?

FM approved transformer oils include mineral oils that meet specific fire safety standards set by FM Global. These oils typically undergo rigorous testing for flammability and thermal stability. Common FM approved transformer oils are those with low flash points and high fire points, such as certain formulations of naphthenic and paraffinic oils. Additionally, some synthetic ester oils are also FM approved, offering enhanced fire resistance and environmental benefits. Always verify the latest FM approvals for compliance.