For an IP4X rating, what is the largest object size that can be protected from entry?

An IP4X rating indicates that the equipment is protected against solid objects larger than 1.0 mm. This means that if an object is 1.0 mm in size or larger, the equipment is effectively safeguarded against its entry. Common objects that fit this size category include tools, wires, and other solid foreign bodies that could cause damage or interference.

The relevance of this specification lies in ensuring that equipment can function safely without risk of damage from small objects that could potentially disrupt its operations. For instance, an electrical enclosure rated at IP4X would not be penetrated by anything larger than 1.0 mm, effectively providing a certain level of protection against accidental ingress and ensuring reliability in various environments.

Smaller object sizes, such as 0.5 mm or 2.5 mm, do not count against this specific rating. Therefore, the correct understanding of IP4X focuses on the threshold size of 1.0 mm, which establishes the minimum protection level ensured by that IP rating.