This standard specifies testing methods for porcelain station post insulators and indoor post insulators (hereinafter referred to as insulators) used in power generation and substations. Either the main body or annexes (regulations) of this standard shall be applied consistently to one product. Corresponding provisions and contents of both shall be applied by selecting or mixing them as appropriate. I can't.
JIS C 3801-2:1999 history
1999JIS C 3801-1:1999 Testing method for insulators -- Part 1: Insulators for overhead line