Dryer Plug Wiring Diagram. A 4 prong dryer outlet is wired as a 120 240 volt circuit. Electrical wiring for a dryer power cord has a typical 240 volt electric power cord with 3 wire and 4 wire wiring configurations many people may experience the situation of trying to make a older dryer work with an new four wire receptacle.
You may find yourself with either a 3 wire or 4 wire electric dryer or a 3 wire or 4 wire outlet. The 120 volt service is for the dryer s timers sensors and other electronics while the 240 volt service supplies power to the heating elements. See an electric dryer installation with a typical 240 volt electric power cord wiring system.
Their standard plugs which used to connect to a three prong outlet as shown in figure 1 were updated to a four prong version the earlier models of dryers used to wire the neutral and the ground together which at the time was accepted by the nec national electric code standards.
In 1996 the rules about how clothes dryers connect to electric panels changed in many places. The 120 volt service is for the dryer s timers sensors and other electronics while the 240 volt service supplies power to the heating elements. It includes guidelines and diagrams for different types of wiring strategies and other items like lights windows etc. Their standard plugs which used to connect to a three prong outlet as shown in figure 1 were updated to a four prong version the earlier models of dryers used to wire the neutral and the ground together which at the time was accepted by the nec national electric code standards.
