Using 120 solenoid to replace 240 solenoid

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  #1  
Old 01-07-16, 09:07 AM
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Using 120 solenoid to replace 240 solenoid

My welding machine is 240 volts. The gas solenoid went bad and I can't find a replacement. Did find 120 replacement. Can I use one leg of the 240 for the 120?
 
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Old 01-07-16, 10:02 AM
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As long as you have a neutral connection available it should work. If you don't have a neutral you could put in a small step down transformer.
 
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Old 01-07-16, 10:03 AM
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Are you referring to the coil voltage? If so no. You welder has no neutral and using the ground is unsafe. You can use an auxiliary step down transformer 240::120. Better give us full details on the relay you need and a pro here may be able to steer you to one.
 
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Old 01-07-16, 10:06 AM
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Thanks for the help

I will find a step down transformer but won't I still need a neutral? Wire the step down from a separate 120 feed?
 
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Old 01-07-16, 10:11 AM
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You'll connect the 240 side of the step down to the lines that used to go to the solenoid, and then connect the 120 side to the solenoid. No neutral required. When the transformer gets 240 applied, it will supply floating 120 to the solenoid.
 
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Old 01-07-16, 11:06 AM
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240 to 120 solenoid

Thank you all very much.Saved me a lot of expense.
 
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