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
📅 Feb 2025
Reference Answer
### (a) Function of insulation in an electric conductor (3 Marks)
Electrical insulation in a conductor serves several critical functions, ensuring safe, reliable, and efficient operation of electrical systems:
* **Confinement of Current**: The primary function is to confine the flow of electric current exclusively within the designated metallic conductor. This prevents the current from straying into unwanted paths, which could lead to energy loss, equipment malfunction, or hazardous conditions.
* **Prevention of Short Circuits**: By providing an electrically non-conductive barrier, insulation prevents direct contact between conductors operating at different potentials, or between a conductor and ground/earth. This eliminates the risk of short circuits, which can cause excessive current flow, overheating, arcing, and severe damage to equipment.
Electrical insulation in a conductor serves several critical functions, ensuring safe, reliable, and efficient operation of electrical systems:
* **Confinement of Current**: The primary function is to confine the flow of electric current exclusively within the designated metallic conductor. This prevents the current from straying into unwanted paths, which could lead to energy loss, equipment malfunction, or hazardous conditions.
* **Prevention of Short Circuits**: By providing an electrically non-conductive barrier, insulation prevents direct contact between conductors operating at different potentials, or between a conductor and ground/earth. This eliminates the risk of short circuits, which can cause excessive current flow, overheating, arcing, and severe damage to equipment.
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play