How does it work?
The first digit represents protection against penetration by solid objects accessing hazardous parts, the second describing the enclosures, protection against the ingress of water. An X in place of either digit means that either the enclosure has not been tested or that the test is not applicable.
Protected against solid objects over 50mm, e.g. accidental touch by hands
Protected against solid objects over 12mm, e.g. fingers
Protected against solid objects over 2.5mm, e.g. tools and wires
Protected against solid objects over 1mm, e.g. wires, nails etc.
Protected against dust limited ingress, not harmful deposits
Totally protected against dust
Protected against vertically falling drops of water e.g condensation
Protected against direct sprays of water up to 15 degrees from the vertical
Protected against direct sprays of water up to 60 degrees from the vertical
Protected against water splashed from all directions, linted ingress permitted
Protected against low pressure jets of water from all directions, limited ingress permitted
Protected against strong jets of water e.g. on ships deck limited ingress permitted
In the event of additional holes being drilled, pierced or knockouts removed, suitable measures should be taken to restore the product to its original rating IEC 529, BS EN 60529 does not apply tp protection against the risk of explosion or conditions such as humidity, corrosive gases, fungi or vermin. In certain cases equipment designed to be mounted in an enclosure will contribute towards the stated IP rating, (e.g. push buttons mounted in an enclosure). Different parts of enclosures can have different degrees of protection and still conform to the standard.