This standard applies to AC-only plugs and fixed or portable outlets for household and similar purposes, with a rated voltage of more than 50 V and 440 V or less, and a rated current of 32 A or less, with or without a grounding electrode. This specifies whether it is for indoor or outdoor use.
JIS C 8282-1:2007 Referenced Document
JIS C 0920:2003 Degrees of protection provided by enclosures (IP Code)
JIS C 0922:2002 Protection of persons and equipment by enclosures for electrical apparatus -- Probes for verification
JIS C 2134:1996 Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions