Protected enclosure (or machine)
An enclosure (or machine) designed to restrict or prevent the ingress of liquids or solid particles in harmful quantities, or solid extraneous objects of specified size.
Note 1: See also 6-4-140.
Note 2: The different categories of protection are specified for enclosures in IEC 529, and for machines in IEC 34-5.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)