StacksVerified U.S. regulatory reference

30 CFR §18.25

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Insulating materials that give off flammable or explosive gases when decomposed electrically shall not be used within enclosures where the materials are subjected to destructive electrical action.
  2. (b)Parts coated or impregnated with insulating materials shall be heat-treated to remove any combustible solvent(s) before assembly in an explosion-proof enclosure. Air-drying insulating materials are excepted.