What type of cover is required for all 15- and 20-ampere receptacles installed in a wet location?

For receptacles installed in wet locations, an extra-duty weatherproof cover is required. This type of cover is specifically designed to provide additional protection against moisture and harsh environmental conditions, ensuring that the receptacles remain safe and functional. These covers are built to meet stringent requirements for weather resistance and are usually equipped with features such as gaskets and secure latching mechanisms.

The necessity for an extra-duty cover stems from the increased risk of electrical shock and equipment failure in wet locations. Standard covers might not adequately protect the receptacles from water ingress, which could lead to short circuits, corrosion, or even fire hazards. By using an extra-duty weatherproof cover, you ensure compliance with electrical codes and enhance safety in outdoor or damp areas where electrical installations are prevalent.