Arc Welding Machines and Overcurrent Protective device

[Here2learn808]

Hi All,

We would like to upgrade our facility and its work station for our maintenance. One of the things that we have discussed was adding more 480V welding receptacles to a 60A circuit. Those 60A circuit are currently dedicated to only one welding receptacle and there is a plan to add two more. At 46Amps per welding machine, would we trip those breakers if we add two more welding receptacles in the circuit?
Looks like we may need to upgrade the conductors as well. I've attached a reference photo of the welding machines that they use at the shop.

Thank you.

 

[davidbeach]

You should never have more than one welding machine on a circuit. When you have only one you can safely have multiple receptacles on a single circuit as there'd never be more than the one welding machine on the circuit. Once you have more than one machine you're pretty much limited to one receptacle per circuit.