This specification covers:
— standard degrees of protection provided by enclosures for switchgear and controlgear for voltages up to 1000 V a.c. and 1500 V d.c, as regards:
a) protection of persons against contact with live or moving parts inside the enclosure
b) protection of equipment against ingress of solid foreign bodies, including dust
c) protection of equipment against ingress of liquid,
— markings regarding these degrees of protection;
— tests to be performed to prove that the equipment meets the requirements of this specification.
This specification does not apply to special degrees of protection, such as protection of equipment in an explosive atmosphere and other unusual service conditions such as fungus and corrosive vapours.
This specification is intended to serve as a guide to the requirements for protective enclosures. The tests, however, are applicable only where practicable and where agreed between manufacturer and user.
The effects of stresses occurring during short-circuit or other abnormal operation are not covered by this specification.