Is The Common Wire Hot May 12, 2019 3. I moved this conversation over from Issue Is The Common Wire Hot Or Neutral. www.anenglathi.com 4 Prong Electric Dryer Adapter4 Wire Light Switch WiringClothes Dryer Power CordDryer Outlet BoxSimple Light Switch Wiring Diagram7 Flat Trailer WiringDryer Power Cord 3 ProngWays To Wire A Light Switch