What standards govern cable oil purification practices?

Standards governing cable oil purification include:

IEC Standards (International Electrotechnical Commission): Provide guidelines on insulating fluids, their handling, and testing methods.
IEEE Standards: Offer best practices for maintenance and testing of cable systems and insulating oils.
ASTM Standards: Include methods for oil sampling, testing, and analysis (e.g., ASTM D923 for sampling electrical insulating liquids).
ISO Standards: Cover quality management and environmental considerations.
National Regulations: Local laws and regulations that may dictate specific requirements for handling and disposing of insulating oils.
Adhering to these standards ensures that purification practices meet industry benchmarks for safety, quality, and environmental responsibility.