Concentric twisted - conductor in the middle of a line or a core, surrounded by one or more layers of helical arrangement of twisted wire.

Stranded - Each unit within the conductor is not geometrically arranged, but is twisted in the same direction.

Composite twist - the core of the conductor for the same strand or stranded wire, around one or more concentric stranded stranded in accordance with the method of concentric twisted together.

Twisted copper direction

Left twist: the twisted wire is counterclockwise, also known as "Z twist", when viewed from the conductor surface (\\\\\\\\) form.

Right twist: the twisted wire is clockwise, also known as "S twist", when viewed from the conductor surface appears (////////) form.