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What is an IP rating?

IP - Ingress Protection rating is used to specify the environmental protection - electrical enclosure - of electrical equipment

The IP rating normally has two numbers:

  1. Protection from solid objects or materials (like dust)
  2. Protection from liquids (water)

By the book


IP First number - Protection against solid objects

0No special protection
1Protected against solid objects over 50 mm, e.g. accidental touch by persons hands.
2Protected against solid objects over 12 mm, e.g. persons fingers.
3Protected against solid objects over 2.5 mm (tools and wires).
4Protected against solid objects over 1 mm (tools, wires, and small wires).
5Protected against dust limited ingress (no harmful deposit).
6Totally protected against dust.

IP Second number - Protection against liquids

0No protection.
1Protection against vertically falling drops of water e.g. condensation.
2Protection against direct sprays of water up to 15o from the vertical.
3Protected against direct sprays of water up to 60o from the vertical.
4Protection against water sprayed from all directions - limited ingress permitted.
5Protected against low pressure jets of water from all directions - limited ingress.
6Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
7Protected against the effect of immersion between 15 cm and 1 m.
8Protects against long periods of immersion under pressure.

In another blog we compared the IP rating of Hog Slat’s Vent Actuator (65) vs. a competitive brand (53)

A rating of 65 means the Hog Slat unit is totally protected from dust and protected against low pressure streams entering from any direction.

The competitive brand rating of 53 has limited protection from dust and no protection from direct sprays of water.

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