A standard 110-volt circuit in a home or building typically has two wires:

* Hot wire: This is the wire that carries the electrical current at 110 volts. It's usually black or red.

* Neutral wire: This wire carries the return current back to the power source. It's typically white.

There's also usually a ground wire, which is bare or green. The ground wire is a safety feature and provides a path for electricity to flow to the ground in case of a fault.

Here's a summary:

* Hot wire: Carries 110 volts (black or red)

* Neutral wire: Carries return current (white)

* Ground wire: Safety feature (bare or green)

Important Note: The number of wires and their colors can vary depending on the specific circuit and wiring codes in your region.