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How to find out how many amps are going to a electrical receptacle there are 120 volts going to it.

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Look at the corresponding breaker in the panel box. That would tell you the maximum amperage.

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Working with what little information that is in the question, this is a very good answer. Star.
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Thanks
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I do believe there is a formula for transferring volts into amps.Check for the formula.

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Yup, it's E=IR where E is the voltage, I is the current, and R is the resistance, and there's not enough information in the question to calculate the amperage drawn by an unknown thing plugged into it.
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i would like to hook up a 90 amp welder
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Ah. 90 amps, I expect, is the output of the welder, because it has a step-up transformer inside. Well, your welder should have what's called a "boilerplate" which specifies not only the output amperage, but also the type of input voltage/amperage you're required to plug into.

From your question, I presume that's 120 volts, not 220 which is typically the case for heavier duty welders. Now--IF your welder has a regular plug on it, it's likely that the input voltage/amperage doesn't exceed 120 volts at 15 amps because that's what a regular outlet is confined to by standard electrical code.

IF you do NOT have a standard plug on your welder, you will need a specialized outlet to accommodate that, at the amperage rate your welder demands, AND it needs to be on a separate breaker, AND you cannot plug it in to any other outlet.

Find the boilerplate and determine what INPUT is required by your welder before you go any further.
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ok thank you so much big help
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You're welcome. :)
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The number of amps going to an electrical outlet depends on the load that's plugged into it.

Common electrical outlets are rated for no more than 15 amps maximum although there are regular outlets that can be installed to handle 20. Outlets that handle more than 20 don't look "regular" so that no regular plug can be plugged into them by mistake.

Looking at your breaker box is a good idea to determine whether your outlet can handle 15, 20, or more, but you also have to know which breaker your particular outlet is connected to.

Breakers that are "ganged" (tied together) usually are on the same circuit and you have to add the two ratings together to come up with the amperage that circuit carries. Breakers like that are usually dedicated to a single large appliance like an electric stove or large air conditioner.

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does it give you ohms or watts? if not give my husband time to look in his book. he's studying to be an electrician. if you want to know the formulas look on computer under ohms law if you want to do it yourself. :)

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Wonderful, that he's studying to be an electrician. That being the case, he'd realize that there's a national electrical code standard that covers this topic, which will fill in those blanks if he's already familiar with it.
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he did not know that. he's only been in school for a month. he says thank you for the info
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You're both welcome. :)
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If it's a standard branch circuit duplex receptacle(one above the other w/white two hole cover) it is supposed to be on a 15 or 20 amp. breaker according to NEC (code). You can check it with and ammeter or by identifying the breaker that controls that receptacle.