U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 24, 2020

§ 111.20-1 - General requirements.

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.

[CGD 94-108, 61 FR 28278, June 4, 1996]