Prevent unwanted disconnects from electrical arcing and loss of power with this 12/3 sjtw extension cord"s revolutionary, patented locking connector. With 50 ft. Of cable to extend around the jobsite, standard cords connect securely and withstand a pull strength of 80 lbs. Vertically or horizontally. For added safety, a built-in power indicator light shows power going through the cord, and a continuous ground monitoring (cgm) light indicates that the cord and circuit are safely grounded. The cor