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The only way to tig is to have your ground clamp hooked to the positive side of the welding machine. The negative lead will go to the tig torch. If it is reversed you will find out very quickly when you strike an arc. Most metals will be welded using this Polarity (straight). Most Aluminum TIG welding is performed using A C current.

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Q: What polarity is used for mild steel GTAW?
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Related questions

What type welding current may be used with GTAW?

A C, with high frequency superimposed, when welding Aluminum. D C straight polarity on almost everything else.


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