What can cause a voltage spike?

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Description : What is the cause of voltage fluctuation?

Description : What can cause a short circuit?

Description : What is the cause of a brownout?

Description : What would cause a power surge in a house?

Answer : If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip  

Description : Why do non linear loads cause harmonics?

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