What are the proper polarity and cable connections for MIG and flux-cored welding?

For GMAW (MIG) welding with solid wire and shielding gas, use DCEP (Reverse polarity) with the gun cable connected to the positive (+) terminal and work cable to the negative (−) terminal. For FCAW (Flux-Cored) self-shielding wire with no gas, use DCEN (Straight polarity) with the gun cable connected to the negative (−) terminal and work cable to the positive (+) terminal. Always follow the wire manufacturer's recommended polarity.