Raceways enclosing service-entrance conductors must be suitable for what condition when exposed to weather?

Raceways that enclose service-entrance conductors are essential components in electrical installations, particularly when these installations are located outside where they may be subjected to various weather conditions. When it comes to raceways exposed to the weather, they must be suitable for wet locations. This means they should be designed and constructed to prevent moisture ingress and protect the electrical conductors from rain, snow, and humidity.

Installing raceways in wet locations involves using materials that have adequate protection against corrosion and that can withstand the environmental stresses associated with being exposed to water. Therefore, raceways for service-entrance conductors must ensure that they can maintain safety and electrical integrity while enduring continuous exposure to moisture.

The other conditions, such as dry locations, indoor installations only, and subsurface environments, do not convey the specific requirements for raceways used outdoors. Dry locations imply no moisture exposure, which does not apply outside, whereas indoor installations would exclude outdoor raceways entirely. Subsurface environments present different challenges and regulations that are distinct from the requirements for raceways exposed to the elements above ground.