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.

Regular Bunch: 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.

Concentric Geometric Arrangement of Concentric Bunched Conductors :

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

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.

Smoothbunch Conductors:

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.

Standards: ASTM B174, ASTM B8, ASTM B286, EN 60228

Rope-lay Conductors :

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

Standards: ASTM B172, ASTM B173, EN 60228

Sample Table: