IP/IK & CHEMICAL RESISTANCE TABLES
Ratings guide users and installers as to the suitability if light fittings where particuler environmental factors exist.
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What is an IP rating?

The IP (Ingress Protection) system is an internationally recognised mehod to indicate the degree of protection against the ingress of dust, solid objects and moisture into an enclosure

the resistive performance of fittings to solids and liquids is indicated by the IP prefix followed by two numbers. The first number indicates the measure of protection against the ingress of solids. For instance: IP2X.
The second number indicates the measure of protection against the ingress of liquid. For instance: IPX5. 

What is an IK rating?

IK (Impact Protection) ratings are an international numeric classification to indicate the degrees of protection provided by enclosures for electrical equipment against external mechanical impacts.

What is chemical resistance?

Chemical resistance is the ability of a polymeric material to maintain its original properties after being exposed to an indicated chemical reagent environment for a specified time period.

Chemical resistance data recommendations are based on information from material suppliers and careful examination of available published information  and are believed to be accurate. However, since the resistance of metals, plastics and  elastomers can be affected by concentration, temperature, presence of other chemicals and other factors, this information should be considered as a general guide rather than an unqualified guarantee.