Where exposed to the weather, raceways enclosing service-entrance conductors must be approved or listed for use in what type of locations?

Raceways that enclose service-entrance conductors and are exposed to the weather must be approved or listed for use in wet locations. Wet locations refer to areas where water can drip, splash, or otherwise penetrate the electrical equipment, such as outdoor environments. These conditions require materials that can withstand moisture, corrosion, and other potential damage caused by the elements.

Using raceways suitable for wet locations ensures that the conductors contained within are protected from moisture that could lead to short circuits, equipment failure, or even fire hazards. This is particularly crucial for service-entrance conductors, which are a vital part of the electrical system, bringing electricity into a building or structure.

The other options do not apply as appropriately to outdoor installations:

• Dry locations refer to environments where moisture exposure is minimal or nonexistent, making them unsuitable for weather-exposed raceways.

• Indoor locations imply a controlled environment, where the risks associated with weather exposure do not exist, thus not requiring the same level of protection.

• Underground locations, while they may seem similar, often have different requirements and considerations such as increased pressure and debris exposure, which are not the same as those posed by direct weather elements.

Therefore, the correct designation for raceways that will be subjected to outdoor