Time Traveler wrote:
Reading the specs on a commercial spot welder for 115v it says output is
40 amps.Am I missing something from this spec?

I expect you are missing something. What does it say the voltage is?
Spot welders are usually less than 5 volts so with a 40 amp output the
power would be about 200 watts or less.
Not as much as a big soldering iron.


Dan