Question
Download Solution PDFIn case of electrical installations, if cable conductors are spiralling, then the resistance/unit length will _______.
This question was previously asked in
SSC JE Electrical 06 Jun 2024 Shift 2 Official Paper - 1
Answer (Detailed Solution Below)
Option 4 : increase
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Download Solution PDFSpiraling 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.
Last updated on May 29, 2025
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