Almost all Architectures, designers, Engineers and general technical persons who engages with Lighting applications have general idea of IP Rating of the fittings and its application. But sometimes it is being noted over rated IP rating is requested or used in Bath Room lighting application. This article describes correct IP rating which should be used for a Bathroom as per IEE Wiring Regulation 18th Edition.

IP stands for Ingress Protection, it is formed for two digits (eg. IP XX). The first digit indicates the level of protection against solid objects. The second digit indicates the level of protection against liquids.