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Old 03-09-2008, 09:37 AM   #1
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250V-20A to laundry hook up


How can I hook up a 250v -20 amp three prong plug like this






to a 5 plug laundry style plug?


Please help.




I thought I could change the receptacle but there is 4 wires on the laundry one and the one I want to put in has 3 plugs.


What can I do?

Please help

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Old 03-09-2008, 09:39 AM   #2
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250V-20A to laundry hook up


I have NO idea what you are asking.

The 230v receptacle/plug in that image is 30A, not 20A.

What are you trying to do....specifically.

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Old 03-09-2008, 09:42 AM   #3
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250V-20A to laundry hook up


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Originally Posted by Speedy Petey View Post
I have NO idea what you are asking.

The 230v receptacle/plug in that image is 30A, not 20A.

What are you trying to do....specifically.

On the plug it says 250v/20amp that is what it says on the plug..

now my receptacle is just a standard laundry style plug
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Old 03-09-2008, 09:52 AM   #4
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250V-20A to laundry hook up


Quote:
Originally Posted by Speedy Petey View Post
I have NO idea what you are asking.

The 230v receptacle/plug in that image is 30A, not 20A.

What are you trying to do....specifically.

the stats on the machine I want to run are this

230 V operation: 150A at 23 VDC

but the plug says 250v 20 amp.. that is what the plug says..
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Old 03-09-2008, 12:46 PM   #5
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250V-20A to laundry hook up


Quote:
Originally Posted by Speedy Petey View Post
I have NO idea what you are asking.

The 230v receptacle/plug in that image is 30A, not 20A.

What are you trying to do....specifically.
why is that not a 50 amp (6-50R)?http://www.passandseymour.com/pdf/G02.pdf

I believe what the situation is:

OP has an adapter that will take whatever is on the machine (seems to be of independant design but can't tell for sure) and adapt it to fit either a 5-15R or a 6-50R. Apparently the machine is convertable voltage.

OP has a dryer recep available but not sure what he means with
Quote:
to a 5 plug laundry style plug?
after which he goes on to say he has a 4 wire dryer plug which would be a 14-30R.

OP: list what the machine tag says for "input" I am guessing you will have something like:

120 volts XX amps/ 240 volts XX amps

(the voltages could be 110, 115, 120, and maybe 130 for the lower and 220, 230, 240 for the higher value. Doesn't make a diff, just list it as it shows.
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Old 03-09-2008, 02:18 PM   #6
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250V-20A to laundry hook up


Quote:
Originally Posted by nap View Post

OP has a dryer recep available but not sure what he means with after which he goes on to say he has a 4 wire dryer plug which would be a 14-30R.


I meant to say a 4 wire dryer plug. I took the recep out of the wall and was going to put a new recep in but the new recep has only three wires to hook up.


I need to figure out what to do with the third wire.
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Old 03-09-2008, 02:30 PM   #7
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250V-20A to laundry hook up


you didn't answer my questions, which are of extreme importance.

just to toss in another one, there will be a duty cycle on that same tag. list is here.
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Old 03-09-2008, 02:33 PM   #8
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250V-20A to laundry hook up


Rated Output
  • 230 V operation: 150A at 23 VDC, 40% Duty Cycle
  • 115 V operation: 90A at 18 VDC,
    20% Duty Cycle
Welding Amperage Range
  • 30 - 175 Amps
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Old 03-09-2008, 02:36 PM   #9
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250V-20A to laundry hook up


I repeat:

Quote:
OP: list what the machine tag says for "input" I am guessing you will have something like:
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Old 03-09-2008, 05:54 PM   #10
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250V-20A to laundry hook up


The output is completely irrelevant.

We need the input amps as related to input volts.

Better yet, post the actual model number of this unit.

Are you ever going to need the dryer receptacle again? If not then yes, you can change the receptacle and breaker to match the welders 250v/20a plug.
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Last edited by Speedy Petey; 03-09-2008 at 05:57 PM.
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Old 03-09-2008, 06:56 PM   #11
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250V-20A to laundry hook up


This is a welder than can be plugged in to a 120 volt 3 prong receptacle or a 240 volt 3 prong receptacle. It has a bunch of interchangeable plugs which attach to the adapter on the end of the cord set. Kind of handy for maintenance guys.

Pyro, your main question has to do with 4 VS 3 wires. The dryer circuit has 2 hots, a neutral, and a ground. Your welder does not require the neutral on a 240 volt circuit. So you would connect your new receptacle to the 2 hots and the ground. Wire nut the end of the neutral (white wire) and tuck it into the box. If the plug does say 250 volt and 20 amps you will want to change your 30 amp dryer circuit breaker for a 20 amp circuit breaker. Unless the manual tells you the unit can be pugged into a 30 or higher amp circuit, which I think is the case.

Now tell us your aren't going to weld in the laundry room.
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Old 03-09-2008, 07:42 PM   #12
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250V-20A to laundry hook up


I know what he has jrclen. I was trying to make sure the circuit was capable of handling the welders requirements. Nothing more, nothing less.

While others saw the pic as a 30 amp 240 volt recep, I believe it looks to be a 50 amp recep. Last I saw a 30 amp 250 volt recep, the two blades are horizontal, not vertical. Not that that is what the machine requires (probably not) but the tag willl tell us. If it needs more than the 30 amp of a dryer, then he cannot hook it up to the dryer circuitry because the wire size will be too small.

I will not make a determination on the plug of the cord. The manufacturer could have put anything on there with total disregard to what the machine actually requires. No way to tell..........except for the power tag.
You do realize that the other recep is a 120 volt 15 amp, right? and we are plugging a 20 amp plug into it, right?

Sound right to you?

simple question, simple answer and all will be good and safe when done. You may be right but I won;t make that call without the info that allows me to make that call.
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Old 03-09-2008, 08:34 PM   #13
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250V-20A to laundry hook up


Quote:
Originally Posted by nap View Post
I know what he has jrclen. I was trying to make sure the circuit was capable of handling the welders requirements. Nothing more, nothing less.

While others saw the pic as a 30 amp 240 volt recep, I believe it looks to be a 50 amp recep. Last I saw a 30 amp 250 volt recep, the two blades are horizontal, not vertical. Not that that is what the machine requires (probably not) but the tag willl tell us. If it needs more than the 30 amp of a dryer, then he cannot hook it up to the dryer circuitry because the wire size will be too small.

I will not make a determination on the plug of the cord. The manufacturer could have put anything on there with total disregard to what the machine actually requires. No way to tell..........except for the power tag.
You do realize that the other recep is a 120 volt 15 amp, right? and we are plugging a 20 amp plug into it, right?

Sound right to you?

simple question, simple answer and all will be good and safe when done. You may be right but I won;t make that call without the info that allows me to make that call.
Don't get me wrong Nap, I understood what you were saying. And I agree that the 240 plug looks like a 50 amp. The last one of these Miller units I welded with used 20 amps at 240 and 15 amps at 120. It did that by reducing the output available. But I sure was not trying to step on your toes. I only wanted to explain which three wires he needed to use and should have stopped right there. That plug is a 15 amp plug by the way. I'm sorry if I riled you up. That was not my intention.
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Old 03-09-2008, 08:46 PM   #14
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250V-20A to laundry hook up


No problem from my perspective. I just have learned to be cautious on these forums. When at work and I have access to all the info, it is easy to make the call and if something happens, it is me that has to deal with it.

On these forums, a person without all the knowledge you or I (or petey) has is asking for directions on how to do things. Some of them are very open and honest and we can walk them through just about anything but others are willing to so very unsafe things and I would rather not help them get into trouble.

Just me being cautious. As far as I am concerned, my toes are no more important than anybody elses toes around here. There are some here that know what I know and some that know more but when it comes down to it, we simply need to make sure that those we are trying to help do not get hurt from what we tell them.
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Old 03-09-2008, 09:33 PM   #15
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250V-20A to laundry hook up


The white wire is not used if I remember correctly. I am using the 6-50r plug on a 25a circuit breaker. When plugged into 220/240 circuit it keeps the voltage balanced between both legs. (Uses different internal circuitry when using a 110/120 circuit.)

Ground is still needed, neutral is not.

Kurt

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