StacksVerified U.S. regulatory reference

46 CFR §111.20-1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Each transformer winding must be resistant to moisture, sea atmosphere, and oil vapor, unless special precautions are taken, such as enclosing the winding in an enclosure with a high degree of ingress protection.