This Standard specifies photoelectric controls for public lighting (hereafter referred to as "PC switches") of integral system or separate system with a rated voltage 100 V or 200 V intended for use as a single unit in general outdoor places under a.c. singlephase two-wire system.
General places above-mentioned do not include the following.
a)Places where corrosive gases exist
b)Places where salt damage is anticipated such as seashore
c)Places where it is always high temperature or high humidity