Bunched wires having cross sections from 0.055 to 300 mm2 are produced by bunching a certain number of single end wires with certain diameters.

The classification of bunched wires are based on geometric arrangement, lay length and direction which are specified according to particular application.

Right-Hand Lay : z
Left-Hand Lay : s

In Regular Bunch construction the respective wires do not have a defined position in the bunch cross section, the surface is irregular and the diameter and roundness varies.

Concentric Bunched Conductors : They have cross sections from 0.055 to 300 mm2 and are produced by bunching a certain number of single end wires with certain diameters to obtain a defined geometric arrangement with smooth and regular surface.

Unilay Concentric : There is one or more layers of wires around one single wire at the center. Each wire layer has the same lay length and direction. Example : 1+6, 1+6+12, etc.

Semi-Concentric : There is one or more layers of wire around more than one wire at the center. Example : 2+8, 3+9, 4+10, 5+11, etc.

Unidirectional Concentric : Lay directions of layers are the same but lay lengths increase from center.

Equilay Concentric : Lay lengths of layers are the same but lay directions are different.

Conventional, True Concentric : Lay directions of layers are different and lay lengths increase from center.

Produced by bunching and compacting a certain number of wires having certain diameters to form a perfect circular shape and very small lay length. Example : 10, 16, 24, 26, 30, 32, 41, etc.

Produced by bunching of bunched or stranded concentric conductors in the same or opposite direction to form a concentric conductor. Possible arrangements :