What is the average lower limit for a .045 inch diameter E71T-1 electrode?

• A. Approximately 150 amps
• B. Approximately 50 amps
• C. Approximately 100 amps
• D. Approximately 500 amps

Answer: (A)

The main idea is how electrode diameter sets the current needed to create a stable arc in flux-cored welding. A .045 inch E71T-1 is a small-diameter wire, so you start at a relatively modest current to melt the wire and maintain a steady arc and proper deposition. The typical lower end for this combination is around 150 amps. Currents as low as 50 or 100 amps are generally not enough to reliably burn and feed this wire, while 500 amps would be far too high for this diameter and could cause excessive heat, spatter, or burn-through. So, approximately 150 amps is the best match for the lower limit.