In what scenario must conduits be sealed when moisture may contact live parts?

Sealing conduits where moisture may contact live parts is essential for ensuring safety and preventing electrical hazards. When conduits are sealed at either or both ends, it creates a barrier that prevents moisture from entering the conduit system, protecting the electrical components within from potential damage and reducing the risk of electrical faults, short circuits, or even fire.

The requirement to seal conduits is particularly important in environments where moisture is present, such as basements, underground installations, or areas exposed to the elements. This sealing can be accomplished using specific sealing compounds or fittings designed to prevent moisture ingress.

Sealing at both ends or at least one end provides flexibility in installation while maintaining essential protections, enabling electrical systems to function safely even in challenging conditions. This approach aligns with NEC guidelines aimed at promoting safety and reliability in electrical installations.