12-gauge vs 14-gauge extension cord for a 50-foot run: 12-gauge is the safe minimum for a table saw

14-gauge is too thin for a 50-foot run—voltage drop will make the saw run weak and can damage the motor over time. 12-gauge handles the startup current safely. 10-gauge is overkill but fine. Don’t trust a “15-amp rated” 14-gauge cord for long distances.