Any reason for US to switch from 110V to 220V?

[coolwater]

I don't see it happening for many reasons, but is there a good reason to switch from 110 to 220? Is 220V really more efficient than 110V?

[7seven7]

The 220v countries should go down to 110. Power bricks are big enough as they are.

[Tomorrow]

A typical residence is already 220V. The only difference is that a 220V circuit uses two poles from the panel, and a 110/120V circuit uses one plus a neutral.

The only thing to be gained by increasing voltage is to decrease the current (amps) in the conductor, and since most circuits and breakers in a home are already only 15 amps you wouldn't be able to make them smaller by going to 220V.

It's more a function of the appliance, not a function of the electrical system. In a house, the only things on 220V are things that draw a lot of amps - water heaters, dryers, air conditioning, stoves and ovens. The amount of current going to something like a light bulb is already only a trickle at 110V. Going to 220V won't give you any benefit.