CONEC 17-300320-75

A nautical unit of measure equal to one tenth of a nautical mile or approximately 1 fathoms.

IP (or "Ingress Protection") ratings are defined in international standard EN 6529 (British BS EN 6529:1992, European IEC 659:1989). They are?used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies?(tools, dirt etc) and moisture.