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IP Standards. resistance to liquids and dust

The IP protection index includes 2 digits. it represents the degree of protection provided by enclosures

  • the first digit represents the protection against solids (dust)
  • the second digit represents the protection against liquid



First digit - solids

Second digit - liquids

0

no protection

no protection

1

Protection against solids over 50 mm in size

Protection against water drops falling vertically on a product in normal position

2

Protection against solids over 12 mm in size

Protection against water drops falling on a product with up to 15° inclination with vertical of his normal position

3

Protection against solids over 2.5 mm in size

Protection against water drops falling on a product with up to 60° inclination with vertical of his normal position

4

Protection against solids over 1 mm in size

Protection against water drops falling on a product in any direction

5

Dust protected

Protection against water jets in any direction

6

Dust proof

Protection against water bundles, waves, strong water jets (12.5 mm nozzle, distance 2.5 m to 3 m, flow rate 100 l/min 5%).

7


Protection against temporary immersion between 15cm and 1m

8


Protection against prolonged immersion beyond 1m and for 30 minutes.Depth specified by the manufacturer ex: IP68, 1h to 3meters

9K

Protection against high pressure cleaning by high temperature water or steam jets



Refer to IEC (international Electrotechnical Commission) number IEC 60529, for more details www.iec.ch
NEMA is a US standard. NEMA stands for  National Electrical Manufacturers Association.
An approximate correlation between NEMA and IP for water and dust is the following:

IP52IP54IP56
NEMA 12NEMA 13NEMA 4 & 4X

IP focuses on water and dust
NEMA comprises more topics such are rust.
Refer to the site www.nema.org, standard 250 for more informations

 

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