Exam Question
(a) What is the function of insulation in an electric conductor? (3)
(b) What are the various classes of insulation? (8)
(c) What are the desired properties of insulating material? (5)
Class 4 (4th Engineer)
MET
📅 Nov 2024
Reference Answer
### (a) Function of Insulation in an Electric Conductor (3 Marks)
Insulation in an electric conductor serves several critical functions, primarily aimed at ensuring safe, reliable, and efficient operation of electrical systems:
* **Confinement of Current:** The primary function is to confine the electric current to its intended path within the conductor, preventing it from straying or leaking to unwanted areas.
* **Prevention of Short Circuits:** By providing an electrical barrier, insulation prevents direct contact and subsequent short-circuiting between adjacent conductors (e.g., between phases) or between a conductor and any grounded metallic structure (earth).
Insulation in an electric conductor serves several critical functions, primarily aimed at ensuring safe, reliable, and efficient operation of electrical systems:
* **Confinement of Current:** The primary function is to confine the electric current to its intended path within the conductor, preventing it from straying or leaking to unwanted areas.
* **Prevention of Short Circuits:** By providing an electrical barrier, insulation prevents direct contact and subsequent short-circuiting between adjacent conductors (e.g., between phases) or between a conductor and any grounded metallic structure (earth).
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