Are J1772 plugs waterproof?

In brief: Yes, J1772 plugs are designed to be waterproof and safe for use in all weather conditions.

Diving deeper, the SAE J1772 plug, a standard for electric vehicle conductive charge couplers introduced by the Society of Automotive Engineers (SAE), has been thoughtfully designed to ensure safety and reliability under various environmental conditions, including rain and humidity (1).

The robustness of the J1772 plug is rooted in its design. The connectors are sealed to prevent the intrusion of water and dust, and they’re often housed within durable casings. These precautions help to shield the connectors from the elements, making them suitable for outdoor use and ensuring they meet or exceed the IP54 rating for dust and water ingress (2).

Additionally, most electric vehicle supply equipment (EVSE) manufacturers incorporate protective measures in the design of their charging stations. These features may include rubberized covers for the plug when not in use, and safety mechanisms such as ground-fault circuit interrupters (GFCIs) to prevent electrical shocks (3).

However, while J1772 plugs are waterproof and designed for safe outdoor use, it’s recommended to handle them with care during severe weather conditions. For example, one should avoid handling the plug with wet hands or submerging it in water.

References:

1. 1. SAE International: SAE J1772
   2. Clipper Creek: Are EV Chargers Waterproof?
   3. Energy.gov: Charging at Home