In case of electrical installations, if cable conductors are spiralling, then the resistance/unit length will _______.

Spiraling of conductor

• The overhead transmission line needs a conductor which is light in weight and also has greater conductivity. For this spiraling of the conductor is done.
• It is a process in which the core is of the material which has greater conductivity while the outer strands are of lighter material.
• ACSR (aluminum-conductor-steel-reinforced) is one of the most used conductors in transmission lines.
• It consists of alternate layers of stranded conductors, spiraled in opposite directions to hold the strands together, surrounding a core of steel strands.
• The purpose of introducing a steel core inside the stranded aluminum conductors is to obtain a high strength-to-weight ratio.
• A stranded conductor offers more flexibility and is easier to manufacture than a solid large conductor.
• So, the spiraling effect typically leads to a higher resistance per unit length due to the increased effective path length.​