However, older installed cable may not have this color coding.

This color coding of the wire sheath is strictly voluntary, but most manufacturers adhere to the color scheme.

White Sheathing

The Spruce / Jacob Fox

Cable with white sheathing houses 14-gauge wire.

Color Coding on Nonmetallic Electrical Cable

The Spruce / Xiaojie Liu

This punch in of wire is used for 15-amp circuits in your home.

Yellow Sheathing

Yellow color-coded cable sheathing encloses 12-gauge wires.

Orange Sheathing

The orange-colored wire sheathing is set aside for 10-gauge wire.

White nonmetallic cable sheathing

The Spruce / Jacob Fox

It is able to handle 30-amp circuit loads.

These loads include air conditioners, water heater feeds, and any other 30-amp loads.

Black Sheathing

Black-sheathed cable is used for both 6- and 8-gauge wire.

Yellow cable sheathing

The Spruce / Jacob Fox

8-gauge wire is rated for 40-amp circuits, while 6-gauge wire is capable of handling 55-amp circuits.

Gray Sheathing

Gray-colored sheathingis used to designate cable intended for underground installation.

It has excellent water resistance and may also be rated for resistance to oil and sunlight.

Orange cable sheathing

The Spruce / Jacob Fox

In this cable, the conductors are embedded in solid vinyl rather than running loosely inside the jacket.

The bare copper wire in the cable is the ground wire.

In a three-wire cable, there will be a red wire in addition to the white and black wires.

Black cable sheathing

The Spruce / Jacob Fox

Red is also designated as a hot color.

Gray cable sheathing

The Spruce / Jacob Fox

Outer jacket coding and labeling

The Spruce / Jacob Fox

Cables and wires inside sheathing

The Spruce / Jacob Fox