I have good access to Aluminum B type SE wire connected to a 40 amp breaker. It is a dedicated circuit. There are only two capped wires and a thin app 2 mm silver color (aluminum?) wire that is unsheathed and wrapped around the other two capped wires. I will need to shut down power and uncap the wires to see if they are copper or aluminum. The wire is in a junction box in a very good place for me to run new wire off of it, to a good area in my garage where I want to be able to plug in a 130 amp combination flux core mig/stick mma welder that uses a standard extension cord type wall plug. Everything I have read states that with the welder at full 130 amp capacity running on a 6/10 cycle that the 40 amp breaker is plenty. I will check in the next few days if those wires are copper or aluminum. Does this sound safe, and is it doable?
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