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

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.

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.

I remember when things were rated for 117 V.

Click to expand...

I think that came about because someone somewhere determined that was the
"national average" in the USA.

5 year old thread.

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.

AC = Alternating Cycle
DC = Defined Constant

Ratch

hi,
This link shows the global range of 'standards'
https://en.wikipedia.org/wiki/Mains_electricity_by_country
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