1. There are two main stranding methods: regular stranding and bundle stranding. Regular stranding can be divided into simple stranding and double stranding. While regular stranding is characterized by a rounded appearance, it lacks flexibility. Bundle stranding is less rounded, but offers greater flexibility.
2. The choice should be based on needs. The stranding of the conductor depends on the insulation method used. For example, products with extruded insulation (such as PVC and PE insulation) and push-extruded insulation (PTFE insulation) generally use regular stranding to ensure a rounded conductor and facilitate extrusion. Wrapped film insulation generally uses bundle stranding to achieve a flexible conductor. For extruded tubing (FEP and PFA insulation), the requirements are less stringent, and double stranding or bundle stranding can be used. Of course, the stranding method also depends on the number and diameter of the individual filaments. Therefore, it's best to read more and practice more; learning will become much easier.
