| Re: Question about temporary electrical job boxes |
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Group: alt.engineering.electrical · Group Profile
Author: pmastonpmaston Date: Apr 11, 2008 16:58
I got it this time. Here is one more example to see if I really got it. I
have a 110 v mig welder, I seem to remember that it can go 70 or 90 AMP's.
Does that mean I will not be able to weld on any of my outlets, because they
only go as high as 30 or 50 AMPS?. Here comes the other dumb one. What I
don't understand. If I have a wall outlet let's say that is protected by a
30 AMP fuse, how will a 50 AMP spider box protect me up to 50 AMP's that I
don't get into my head either. English is not my native language, so I may
really really sound stupid, but you are so nice to explain it to
me.....Peter
"James Sweet" hotmail.com> wrote in message
news:6BSLj.51$bx3.22@trnddc02...>
>
> "pmaston" comcast.net> wrote in message
> news:Xcadnc5wIfxxbGLanZ2dnUVZ_rmjnZ2d@comcast.com...>> Many thanks for that information. Your last sentence, " you just can't
>> use full output" does that mean the welder will not work at full
>> capacity? I can't picture that in my head why it works that way. Can you
>> explain it to me in a different way.....Peter
>>
>
>
> The electric welders I've used have adjustable welding amperage which is
> set depending on the material being welded, rod type/wire feed rate, etc.
> If the welder draws 50A from the line to put 150A into the weld, and you
> only have 30A available from the line, you won't be able to go up to 150A
> on the output, instead you'll top out at say 100A. These numbers I just
> pulled out of thin air, but it illustrates the point. A lower capacity
> circuit will limit the thickness of the material you can weld because
> there's simply less power (wattage) available before the breaker trips.
>
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