What is a characteristic of some conductor terminations claiming a "conditional" IP20 rating?

A characteristic of some conductor terminations claiming a "conditional" IP20 rating is that they require a specific conductor size for proper installation. This means that for the termination to function effectively and maintain its rated protection level against solid objects (like dust), the conductor size must meet specified criteria.

The "conditional" aspect of the IP20 rating indicates that the rating is dependent on adhering to certain installation requirements, including using the correct conductor size. If the conductor is too small or not within the specified range, it can lead to poor contact, increased resistance, and potential overheating, which can compromise the rating and the safety of the installation.

Choosing the right conductor size enhances the reliability of the terminations and ensures compliance with safety standards, making it essential for maintaining the integrity of the electrical system. This contrasts with other options, which involve requirements or scenarios that don't align with the functional and safety essentials underpinning IP ratings.