Conntek 30126-BK L5-30P 30-Amp 125-volt Locking Male Plug for 15 to 20-Amp Straight Blade Female Connector Adapter Locking Plug Adapter Plug: NEMA L5-30P Locking Recetacle: NEMA 5-15/20R Rating: 20A/125V Max Wattage: 2,500W