What does "double-wipe" refer to in receptacle contacts?

"Double-wipe" refers to the design of the blade contact in electrical receptacles. This design involves two conductive points that make contact with the blade of the plug, which enhances the connection and reduces the resistance. The double-wipe design ensures that there is a secure and reliable electrical connection, minimizing the risk of arcing and providing better performance over time.

In contrast, the other options pertain to different aspects of receptacles. The material used in manufacturing can affect durability and conductivity, but it does not define the contact mechanism. The color of the contact usually relates to identification or branding rather than functionality. Similarly, the voltage rating refers to electrical specifications and safety standards, which do not influence the physical design or contact mechanism offered by the double-wipe feature. Understanding the significance of the double-wipe design is crucial for ensuring optimal electrical connections in devices.