When did wall voltage change?

Last week.. Didn't you get the memo?

http://en.wikipedia.org/wiki/Mains_electricity

 

After a very long day at work thank you. I needed that! HA

 

I'm lucky enough to be the first house off the box, so mine spikes to between 140-150 on a regular basis

 

You need to have the power company come out and take care of that. I'm surprised you aren't blowing applianced and lightbulbs constantly.

"In the United States[3] and Canada[4], national standards specify that the nominal voltage at the source should be 120 V and allow a range of 114 to 126 V (-5% to +5%). Historically 110, 115 and 117 volts have been used at different times and places in North America. Main power is often spoken of as “one-ten”; however, 120 is the nominal voltage."

 

As fast as our computer power supplies and light bulbs go out here, I would guess wall voltage changes about every 37 seconds.

 

Apparently the large condo project a few miles down the road from my neighborhood is causing spikes on our lines as they turn on/turn off/switch the power. We were constantly losing bulbs on our low voltage system and range hood. Our electrician installed a whole house surge protector and things are much better. With all appliances having microchips in them now, it was well worth the price, around 400 including install.

 

I have a piece of equipment from 1965 that has a multi-tap power transformer. One tap is for 117V and one is for 125V. Another piece of equipment, this one from 1981, has a 110V and a 120V tap.