What location classification applies to the interior of a raceway installed underground?
- AIt is damp only when water is visible
- BIt becomes dry when metal raceway is used
- It is wet; use wet-location conductors
- DIt is dry if the joints are glued
Why C is correct
Moisture can enter or condense in underground raceways even when joints are well made. The wiring method must therefore use conductor insulation identified for wet locations; raceway material does not change that classification.