1 of 7
Converting Dryer Cords - What The National Electrical Says About Them
3-Prong and 4-Prong Dryer Cords
Photo: Timothy Thiele
Newer homes are now being equipped with 4-prong dryer cord plugs. This is the new standard and is required under Article 550.16(A)(2) of the National Electrical Code (NEC) 2008. Connections of electrical clothes dryers shall be made with a 4-conductor cord and 3-pole, 4-wire, grounding-type plugs or by Type AC cable.