IP Enclosure Ratings & Standards

Ingress Protection (IP) and what it means

The IP Code (or International Protection Rating, sometimes also interpreted as Ingress Protection Rating*) consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures. The standard aims to provide users more detailed information than vague marketing terms such as waterproof.

The digits (characteristic numerals) indicate conformity with the conditions summarized in the tables below. For example, an electrical socket rated IP22 is protected against insertion of fingers and will not be damaged or become unsafe during a specified test in which it is exposed to vertically or nearly vertically dripping water. IP22 or 2X are typical minimum requirements for the design of electrical accessories for indoor use.

*Explanation of the letters IP is given in IEC 60529 (Ed. 2.1), clause 4.1

IP65   =  First Digit – Solids

IP65   =  Second Digit – Liquids

Examples of the Acrodyne product range and their IP ratings:

Limtorque MX Electric Actuator – IP68 Submersed 15M for 96 hours  *See the Limitorque MX Range

Limtorque QX Electric Actuator – IP68 Submersed 20M for 168 hours  *See the Limitorque QX Range

Noah SA Electric Actuator – IP67 Weatherproof enclosure IP67 Nema 4 & 6  *See the Noah range

Imtex Valve Position Monitor – IP67 Ingress protection  *See the Imtex range

SS5 Smart Positioner Fail Freeze – IP66 Low pressure water jets  *See the positioner range



1. IEC 60529, “degrees of Protection Provided by Enclosures (IP Codes),” Ed. 2.1 (Geneva: International Electrotechnical Commision, 2011)

2. IEC 60529 (Ed. 2.1), clause 4.1.


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