Which description defines a parallel connection in multi-wire welding?

Which description defines a parallel connection in multi-wire welding?

• A. Two wires are fed simultaneously through one wire feeder connected to a single power source
• B. The wires are connected in series using two wire feeders and a single power source
• C. The welding current goes through one wire, through the weld pool and through the other wire back to the power source
• D. Each wire is fed by its own separate power source

Answer: (A)

Parallel operation means more than one welding wire is energized from the same power source so both arcs run at the same supply and share the available current. This is achieved by feeding two wires simultaneously through one wire feeder connected to a single power source. The current from that source splits between the wires, allowing simultaneous deposition with similar arc characteristics and voltage. In this setup, you get the benefit of increased deposition without reconfiguring the circuit for separate sources. The other descriptions describe different arrangements: a series-type setup would force current through both wires in a single path rather than two parallel paths; a path where current goes from one wire through the weld pool to the other isn’t a standard, practical parallel feed; and using separate power sources for each wire removes the shared-source condition that defines parallel operation.

Parallel operation means more than one welding wire is energized from the same power source so both arcs run at the same supply and share the available current. This is achieved by feeding two wires simultaneously through one wire feeder connected to a single power source. The current from that source splits between the wires, allowing simultaneous deposition with similar arc characteristics and voltage.

In this setup, you get the benefit of increased deposition without reconfiguring the circuit for separate sources. The other descriptions describe different arrangements: a series-type setup would force current through both wires in a single path rather than two parallel paths; a path where current goes from one wire through the weld pool to the other isn’t a standard, practical parallel feed; and using separate power sources for each wire removes the shared-source condition that defines parallel operation.