GMAW and FCAW performed above 250 amps requires a welding helmet with a lens shade rating of:

• A. 10
• B. 14
• C. 12
• D. 16

Answer: (B)

When the welding current is high, the arc becomes much brighter and emits more UV/IR radiation, so eye protection must be darker. For GMAW and FCAW runs above 250 amps, a lens shade of 14 provides enough attenuation to protect the eyes from that brightness. Lighter shades (10 or 12) wouldn’t cut it at that amperage, while a shade of 16 would be darker than necessary for most welds and can hinder visibility. Therefore, 14 is the appropriate choice to balance protection with visibility.