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220 Or Not 220

 
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Old 04-07-2011, 01:30 AM   #1
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220 Or Not 220


hey guys since I'm a general contractor and not a licensed electrician i have a question for you. i recently bought a miller mig welder that requires 220v. confused with the instructions i called miller directly and was advised that running my welder off a 220 dryer plug will result in poor performance of my welder. the guy said it needs to be a true 220, and not two 110v lines that make a 220. what does he mean by that? wow in confused. or is he?
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Old 04-07-2011, 07:55 AM   #2
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Re: 220 Or Not 220


He is

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Old 04-07-2011, 07:58 AM   #3
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Re: 220 Or Not 220


Why do people still say 220 and not the real designation of 240 Volts?

Even my electrician friend says 220.

Andy.
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Old 04-07-2011, 08:42 AM   #4
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Re: 220 Or Not 220


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Originally Posted by ScipioAfricanus View Post
Why do people still say 220 and not the real designation of 240 Volts?

Even my electrician friend says 220.

Andy.

Probably for the same reason they say 110 instead of 120.
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Old 04-07-2011, 08:49 AM   #5
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Re: 220 Or Not 220


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Originally Posted by Dan da man View Post
hey guys since I'm a general contractor and not a licensed electrician i have a question for you. i recently bought a miller mig welder that requires 220v. confused with the instructions i called miller directly and was advised that running my welder off a 220 dryer plug will result in poor performance of my welder. the guy said it needs to be a true 220, and not two 110v lines that make a 220. what does he mean by that? wow in confused. or is he?
There is no such thing as 'true' 220 other than what is considered nominal voltage. Right from the NEC:

Voltage, Nominal. A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class (e.g., 120/240 volts, 480Y/277 volts, 600 volts). The actual voltage at which a circuit operates can vary from the nominal within a range that permits satisfactory operation of equipment. (The blue is mine)

Another term that might be applied is tolerance, usually expressed as a percentage. So you might see something like "230 volts +/- 5%". This means the voltage applied can be anywhere between 218.5 and 241.5.

Some machines will state the variances of voltages acceptable right on the nameplate, such as "Voltage: 210-252".


Years ago, it was 220 volts. Then it was raised to 230. Then again to the current (pun intended) 240.
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Old 04-07-2011, 09:37 AM   #6
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Re: 220 Or Not 220


Quote:
Originally Posted by Dan da man View Post
hey guys since I'm a general contractor and not a licensed electrician i have a question for you. i recently bought a miller mig welder that requires 220v. confused with the instructions i called miller directly and was advised that running my welder off a 220 dryer plug will result in poor performance of my welder. the guy said it needs to be a true 220, and not two 110v lines that make a 220. what does he mean by that? wow in confused. or is he?
What is the amperage of the welder, I thought most of the one's i've seen were 50 amp, I've never seen a 50 amp dryer outlet.
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Old 04-07-2011, 10:00 AM   #7
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Re: 220 Or Not 220


Yah should have really confused him and asked if the line power needed to be reversed to run gas or not!!!
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Old 04-07-2011, 10:49 AM   #8
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Yah should have really confused him and asked if the line power needed to be reversed to run gas or not!!!
Ask him if it needs to be LP or natural gas.............
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Old 04-07-2011, 05:29 PM   #9
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Re: 220 Or Not 220


Quote:
Originally Posted by 480sparky View Post
Years ago, it was 220 volts. Then it was raised to 230. Then again to the current (pun intended) 240.
In 1948, an international conference on weights and measures officially adopted "Celcius" as the name for the scale formerly known as "centigrade." Yet to this day, the centigrade designation has far from disappeared.

These things take time.
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Old 04-07-2011, 06:11 PM   #10
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In 1948, an international conference on weights and measures officially adopted "Celcius" as the name for the scale formerly known as "centigrade." Yet to this day, the centigrade designation has far from disappeared.

These things take time.
And if frogs had pockets, they'd carry a gun so they won't have to be afraid of snakes.
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Old 04-07-2011, 06:23 PM   #11
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So much for frog smarts. A holster works better and is much safer.
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Old 04-07-2011, 06:27 PM   #12
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Uh....... you get a hammerless and shoot right through the pocket. Much faster that way.
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Old 04-07-2011, 07:02 PM   #13
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Re: 220 Or Not 220


Friend of mine nearly lost a kneecap due to carrying a small semi in his pocket. He's a believer now.
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Old 04-07-2011, 07:07 PM   #14
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Re: 220 Or Not 220


i need to learn how to do that quote thing. but thats a good question about the amperage. yup just checked book calls for a 30amp breaker. if thats the case maybe i called miller dry cleaning asking for wiring advice for my welder . Because he never mentioned anything about amps just kept on persisting that i needed true 220 or as some of you say 230 or now 240 . i may be a little crazy but he made me feel like a tard. thanks for the input.
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Old 04-07-2011, 07:32 PM   #15
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Re: 220 Or Not 220


220, 221, what ever it takes.
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Old 04-07-2011, 10:32 PM   #16
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Re: 220 Or Not 220


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Originally Posted by chris klee View Post
220, 221, what ever it takes.

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Old 04-08-2011, 05:08 PM   #17
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Re: 220 Or Not 220


Quote:
Originally Posted by ScipioAfricanus View Post
Why do people still say 220 and not the real designation of 240 Volts?

Even my electrician friend says 220.

Andy.
Induction motors are ALWAYS 115, 230, and 460, even though the nominal are 120/240/480.

When you look at plug-in stuff, new stuff is usually 120v, but older stuff you'll sometimes see AC 115v, 117v or 118v

208v dedicated motors say 200v
240v dedicated ones say 230v
Dual rated ones, for some reason say 208-230v

Houses are usually served 120/240 split
Multifamily, office buildings, sometimes have 120/208, derived from 208Y/120v 3ph service. That is what one may call "faux 240v". Water heaters, ovens, dryers etc operate at 75% power.

Welders may struggle if they're not meant for 208v use. (service range: 198v to 218v) 240v(228 to 252).

Since welder doesn't require a neutral, if you must use it on 208v, what you'll use is a 208 to 240 boost transformer.

Last edited by Electric_Light; 04-08-2011 at 05:15 PM.
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Old 04-08-2011, 05:30 PM   #18
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Re: 220 Or Not 220


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Years ago, it was 220 volts. Then it was raised to 230. Then again to the current (pun intended) 240.
You sure you don't mean Europe?

UK was 240, rest was 220. Without making actual physical changes, they changed the tolerance range on paper, EU harmonized it to 230v
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Old 04-08-2011, 05:48 PM   #19
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Re: 220 Or Not 220


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You sure you don't mean Europe? ...........

Wouldn't know about Europe.
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Old 04-08-2011, 06:11 PM   #20
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Re: 220 Or Not 220


LOL! Beat me to it! I was thinking of the same movie clip!

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