When an iron pole is wet, why doesn't the current flow through the water?


Current will flow through water, but only if it completes a circuit. The amount of current that flows depends on the nature of the water. Deionised or distilled water has few ions, so the current will be small. Ordinary tap water will conduct electricity because of dissolved chlorine, aluminum salts used for deflocculation, etc.

Updated on January 8, 2018

Original Article:

What Is the Ground (Earth) Wire For?
By Eugene Brennan