IEC 60529:1989 Degrees of protection provided by enclosures (IP code)
IEC 60664-1:2007 Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
IEC 60664-3:2003 Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
IEC 60695-10-2:2003 Fire hazard testing - Part 10-2: Abnormal heat; Ball pressure test