Strands: Bunches

Several single wires or bundles are bunched together. Those single wires do not hold a fixed position inside the strand. Their position relative to one another undergoes a permanent change along the entire length of the bunch.

• A multitude of applications in cables and conductors
• Crucial advantage: good efficiency

• Uniform elongation of single wires
• Low tolerances, even in single wires (even outperforming ASTM)

• Materials: Cu-ETP1 and Cu-OF1
• Bare, tin-plated, nickel-plated or silver-plated
• Left-hand lay or right-hand lay
• Variation: soft annealed
• Single-wire diameter: ranging from Ø 0.05 mm to Ø 0.51 mm
• Cross-section: ranging from 0.005 mm² to 630 mm²
  

The construction of a bunch is derived from the cross-section required, which leads to the electrical conductor featuring a certain resistance level. Different cross-sections with the same resistance value can be generated by applying single wires of varying sizes.

D = d × f

D = diameter of medium-sized bunch
d = diameter of single wire
f = factor, see table
n = no. of wires to determine factor f

Example

n = 16
d = 0.20 mm
f = 4.7

Bunch 16 × 0.20 mm (= 0.50 mm²)

D = 0.20 mm × 4.7
D = 0.94 mm

Reel sizes from 80 mm (1 kg) to 630 mm (400 kg), subject to diameter

Packaging information

Material Compliance

Quality & Environment

Sustainability