Answer / abhishek kesarwani

see the first digit stands for protection against solid and
second digit stands for liquid protection...

IP 54:- 5 (first digit)- limited particles of dusts can
enter in the panel,
4 (second digit)- if the water is splashed from any
direction then also it can not approach to the components.

IP 55:- first digit is same so please see above.
5 (second digit) The panel shall be protected against low
pressure jet from any direction.

Hope my answer shall satisfy.
If any more clarification needed please send mail on my mail
id so that i can reply you.

Answer / neeraj dubey

IP54 enclosures have a high level of protection against particles, and a fair amount of protection against water and IP55 enclosures that demonstrate almost complete protection from particles and a good level of protection against water.

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