WEST AUTO 4.0MM.SQ (Black,Blue,Yellow and Red)

WEST AUTO 4.0MM.SQ (Black,Blue,Yellow and Red)

WEST AUTO 4.0mm² (Black, Blue, Yellow, and Red) is a 4.0mm² single-core copper automotive/electrical cable used to carry medium to high electrical current in vehicles, battery systems, solar installations, and industrial equipment. It is commonly color-coded to identify different conductors or polarities.

Typical uses include:

Battery connections in vehicles, trucks, and generators.

Solar power systems, such as connecting batteries, inverters, charge controllers, and DC distribution boards.

Automotive wiring for high-current accessories like winches, amplifiers, and auxiliary lighting.

Industrial and control panels where flexible, durable power wiring is required.


The different colors help identify circuits:

Black – commonly used for negative (–) or neutral, depending on the system.

Red – commonly used for positive (+) or live DC.

Blue – often used as an additional phase or control conductor.

Yellow – often used as another phase or control conductor.


The exact meaning of each color should always follow the wiring standard or labeling used in your installation.