Which receptacles are generally required to be listed as weather-resistant?

• A. 15A, 125V locking receptacles indoors
• B. 20A, 125V non-locking receptacles outdoors
• C. 20A, 250V locking receptacles outdoors
• D. 30A, 250V non-locking receptacles outdoors

Answer: (B)

Outdoor receptacles must be weather-resistant because they are exposed to the elements, so the device needs to be listed as weather-resistant to protect against moisture and corrosion. The typical outdoor outlet used in homes is a 20A, 125V, non-locking receptacle, and that configuration is the common scenario that the weather-resistance listing is most often required for. The important idea is that outdoor outlets are expected to be WR-labeled to withstand wet conditions, whereas indoor outlets and specialized locking or higher-voltage outdoor configurations aren’t the standard examples audiences are usually tested on for this requirement.