White wires are usually neutral wires, green or bare wires are ground wires, and any other color is usually hot (carrying a current). In existing wiring jobs, white wires may also be marked with black or red to indicate that it's now a hot wire.
Before starting any electrical project, you need to choose the right wire. Learn more about the different types of wires, colour code standards and more.
Learn how to wire an outlet to remove wire clutter and streamline your space. This guide includes what you need to know, plus steps for adding an electrical outlet by running the line behind your walls.