This is a legitimate question - the IP54 degree of protection is actually intended to ensure that neither dust nor splash water can penetrate the housing to a harmful extent. The fact that a weatherproof box has holes in the base sounds contradictory at first. Here is the technical classification:
The IP code is made up of two digits:
First digit "5" = protection against dust in damaging quantities (dust-protected, but not completely dust-tight)
Second digit "4" = protection against splashing water from all sides
This means that the box must not allow dust to penetrate in damaging quantities, and water splashed against the housing from any angle must not have any damaging effect.
Holes in the base - but still IP54? How does this work with our product?
Such holes in the floor can still be compatible with IP54 in certain cases - under the following conditions:
Water drainage instead of entry (drainage marking): The holes are deliberately used as drainage to drain off condensation or rainwater that may penetrate via seals or when opening. It is essential that no water splashes against the housing from the outside and thus enters the appliance.
Protection through the design of our product: The openings are usually designed in such a way that they are:Covered or recessed (e.g. under a hood or a downward-pulling edge),
are protected against direct exposure to splashing water (e.g. by internal separating chambers or drip edges),