IP	Test	Short Description	Definition
0		non-protected	Additional Protection Required. Intended for access by authorised personnel only
1		protected against solid objects greater than 50mm	a large surface of the body, such as a hand (but no protecton against deliberate access) solid objects exceeding 50mm in diameter
2		protected against solid objects greater than 12,5mm	Fingers or similar objects not exceeding 80mm in length; solid objects exceeding 12,5mm in diameter. Primarily designed for mounting on vertical walls.
3		protected against solid objects greater than 2,5mm	Tools, wires, etc.... of diameter or thickness greater than 2,5mm; solid objects exceeding 2,5mm in diameter.For use on vertical walls or inaccessible horizontal areas.
4		protected against solid objects greater than 1,0mm	Wires or strips of thickness greater than 1,0mm; solid objects exceeding 1,0mm in diameter.For use in most areas mounted vertically or inaccessible horizontal areas.
5		Partial dust protected	Ingress or fine particles are not totally prevented but dust does not enter in sufficient quantity to interfere with satisfactory operation of the equipment.Designed for use in occasionally dusty areas.
6		dust-tight	No ingress of dust. Designed for permanently very dusty areas.

N.B. The standard IP system gives no degree, or measure, of corrosion or weather proofing. Switchgear Systems LTD. would be happy to assist in the selection of the correct enclosure to suit specific applications.