Question by  smash (1)

Why do countries have different voltages?


Answer by  willard (874)

Large scale electrification of cities occurred during the early 1900's. At this point in history, world travel was not a widespread phenomenon and there were few electrical appliances that travelers carried with them. Consequently, countries that were geographically separated(i. e. Europe and the U. S. ) chose their standard voltages independently of one another. There has been little incentive to change.


Answer by  crabfoot (253)

Wires lose less electricity at high voltages, it has to be transformed for home use. Early electric suppliers also sold light bulbs, their systems were designed to help those sales.

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