A very expensive relay/solenoid to close the contacts inside.
I used my Northern Tool 200a Mig/Stick welder as a suitcase. Kind of a pain to drag around 3 cables (220v power, Torch and Ground leads) but it does give me 100% duty cycle running off my Miller Bobcat. Connect the Mig/Stick welder into the torch port, and clamp that to the Torch lead coming off the Bobcat. Ground as normal, and the 220v plug only runs the wire feed.
My new employer actually fitted all the service trucks with a LN-25, so I use that now. Funny though, I've had more jams/bird nesting with that than my NT Mig/Stick. My last repair was a crack in an excavator bucket, and I think I probably had 10 15' bundles of wire laying on the ground when I was done.
I'd like to see the link to the Commercial lineup as well.
Sticks
Field Service Tech for a Concrete Paving Company
Location: The corner of "No" and "Where"
"If they break it, we will fix it"
AKA
"Find some scrap and build a new one"