Is a white wire connected to a black wire or a switch considered hot?

A white wire connected to a black wire or a switch is considered hot because it has the potential to carry current in an electrical circuit. In typical wiring color codes, black wires are used for hot connections, meaning they can be energized, while white wires are designated as neutral. However, if a white wire is modified to fulfill a hot function—such as being connected to a switch or another hot wire—it should be marked with black or red tape to indicate that it is carrying current. This practice avoids confusion and enhances safety.

Understanding this context is vital, especially when working with electrical systems, as it helps ensure proper identification and handling of wires to prevent electric shock or short circuits. The conclusion is that the modified white wire effectively behaves like a hot wire when connected to a black wire or switch, making it hot in practice.