What does NM mean on electrical wire?

Furthermore, what is nm electrical wire?

Understanding NM (Non-Metallic) Sheathed Cable. Sometimes known as "Romex," named for one of the common brand names, NM cable is a flexible electrical cable that features an outer plastic sheathing that protects two or more insulated conductors, as well as a bare copper ground wire.

Subsequently, question is, do electrical wires need to be in conduit? Code requires that romex be installed in a conduit. Conduit also protects your wires from exposed surfaces such as rough bricks in a basement. PVC conduit is easy to cut and to install and will make your wire installation simpler. If your wiring is outdoors, it is very beneficial to run it in an underground conduit.

Thereof, what do the letters on electrical wire mean?

Her's a breakdown to help make some sense of the lettering. The “T” stands for thermoplastic insulated cable. A single “H” means the wire is heat resistant. “HH” means that the wire is heat resistant and can withstand a higher temperature.

How do I identify a wire?

know what each color of wire does in the circuit

1. The black wire is the "hot" wire, which carries the electricity from the breaker panel into the switch or light source.
2. The white wire is the "neutral" wire, which takes any unused electricity and current and sends them back to the breaker panel.