Which of the following is not a cause of fire?

Which of the following is not a cause of fire?

Right Answer is:

Reverse connection in 3- phase motor

SOLUTION

Reverse connection in 3-phase motor is not a cause of fire.

  • (a) Wrong fuse rating: Using a fuse with a higher rating than the circuit’s capacity allows excessive current to flow. This can overheat wires and components, leading to insulation damage and potentially starting a fire.

  • (b) Loose connections: Loose connections increase resistance at the connection point. This increased resistance generates heat, which can ignite nearby materials.

  • (c) Damaged insulation between line and neutral: Damaged insulation creates a path for current to flow between the live (line) and neutral conductors. This can cause a short circuit, generating a large amount of heat and potentially starting a fire.

  • (d) Reverse connection in 3-phase motor: Reversing connections in a 3-phase motor will cause the motor to rotate in the opposite direction. It might lead to overheating if the motor is stalled or overloaded due to the reversed rotation, but the reversed connection itself isn’t the primary cause of fire.

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