This Korean Industrial Standard specifies photoelectric controls for public lighting of inter-gral or separate system with a rated voltage (110)V or 220V intended for individual use in general outdoor places under a.c. single-phase two-wire system (hereinafter referred to as "PC switches").
Remark General places above-mentioned do not include the following :
(a) Places where corrosive gases exist.
(b) Places where damage from salt is anticipated such as seashore.
(c) Places where it is always high temperature or high humidity.
The voltage in parentheses shall not be in use in future.