What type of protection is required for conductors in wet locations?

In wet locations, conductors must have protective measures to ensure safety and reliability. The requirement for non-metallic coverings as well as waterproof insulation comes from the need to protect electrical components from moisture, which can lead to shorts, corrosion, and failures.

Non-metallic coverings provide a degree of protection against direct exposure to water and environmental conditions, while waterproof insulation is essential in ensuring that the conductors themselves do not conduct electricity when wet. The combination of these two forms of protection helps to ensure that the electrical system remains functional and safe in wet conditions, significantly reducing risks associated with water exposure.

This dual protection approach is a key principle in electrical safety standards to mitigate hazards in areas prone to moisture or where exposure to water is possible.