Which of the following CANNOT be caused due to excessive voltage drop in an electric distribution system?

The correct answer is option 3.

1.) Electric lights burning dimly:

Excessive voltage drop can cause lights to burn dimly because the reduced voltage may not provide sufficient power to the bulbs, resulting in decreased brightness.

2.) Electric lights flickering:

Excessive voltage drop can lead to flickering of lights, especially if the voltage fluctuates significantly. Fluctuating voltage can cause the light output to vary, resulting in flickering.

3.) Electric motors running colder than normal:

Excessive voltage drop is less likely to cause electric motors to run colder than normal. Motors typically experience issues such as overheating or reduced performance due to low voltage. However, running colder than normal may not be a common consequence of voltage drop.

4.) Electric heaters heating poorly:

Excessive voltage drop can impact the performance of electric heaters. Insufficient voltage may lead to reduced heating capacity, causing the heaters to perform poorly.