What safety requirement applies to luminaires designed for wet locations?

Luminaires designed for wet locations must be marked as suitable for such environments to ensure safety and compliance with the relevant electrical codes. This marking indicates that the fixture has been tested and rated for resistance to moisture and can safely operate in areas where it may be exposed to water, such as outdoors, bathrooms, or near swimming pools.

When luminaires are appropriately marked for wet locations, installers and users can have confidence that these fixtures will perform safely under the specified conditions, reducing the risk of electrical failures or hazards such as shock or fire. This requirement aims to provide clear identification for users, ensuring the correct installation and usage in potentially hazardous settings.

In contrast, luminaires that are not marked for wet locations may not have the necessary features to withstand moisture, which could lead to serious safety issues. Thus, the requirement for clear marking is essential in maintaining safety standards.