It wouldn’t do to use an IPX9K enclosure only to put an IPX0 switch on the case. In the USA we have another set of standards that address ingress by objects and liquids. The National Electrical ...
When it comes to water, it can range from IPX0 (no protection) to IPX8 (totally waterproof when submerged for sustained periods). When you see “X” like that in place of the first digit ...