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110VAC 115 VAC 120 VAC 210 VAC 220 VAC 240 VAC ????????? Duh

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gary350

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Why are so many produces marked 110 VAC or 220 VAC? That was the voltage in the early 1900s that was 100 years ago. I have not seen that voltage anywhere in 50 years. The voltage at every house I have lived at in TN, IL, MI, AZ, NC, MD, are all 120 VAC and 240 VAC that was many years ago. I bought a new hot water heater and electric stove they were both marked 220 VAC. The new welder that I just bought is marked 220 VAC. Why can't manufactures get it together there is no 110 or 220 volts in this country. The voltage where I use to work was 492 volts on L1 and L2 and 493 on L3 and the offices were 120 VAC.
 
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We live in a global economy, Take a look here: Mains power around the world - Wikipedia, the free encyclopedia

I once had to hook up a 100 V Japanease SEM to wok with 120 V power here in the US.

You totally missed 277 which is used for lighting in commercial establishments. 208/120 is normal too in commercail in the US.

This 85-285 50/60 Hz covers just about everyone in the world with about a 15% tolerence. 10% is what's expected.

3 phase is available for residential in very few localities, but it is. You can have 240, 3 phase delta with a "high leg". 208 3 phase is common, so systems should work for 208 to 240 +-10% in the US.

I do agree, that 120/240 or 120/208 are the standards in the US. I remember when things were rated for 117 V. Now it's mostly 120.

220 +-10% covers them for 208 and 240

Residential stoves are now usually marked 240/120.

I hope that sheds a little bit of light.
 
Many parts of Eastern Europe, Russia, China have still 220 Volts and even 127 Volts 50 Hz systems in place.
 
I had an electric train in high school that was marked 117 volts. Wow that brings back memories.

Office lights at work were a mix of 277, 240 and 120. All the lights on the factory floor were 277.

All the old vintage camper trailers are marked 110 volts.

We had a very old press at work motor was 12 wire 520 volts wired it to the 480 volt circuit that was real 492 volts.

We had a 50 foot long drive through electric oven at work that was 600 volts 800 amps the wire in the circuit box was about 1" diameter stranded copper.

I did a job interview once for coal mine electrician all the electric motors were 5000 volts a 100 hp motor had a 6" diameter shaft but the motor was small about twice the size of a 5 gallon bucket.
 
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