The key difference in the wiring configuration between 3 prong and 4 prong cords is that with the older setup the 3 prong cord has only two hot wires and one neutral wire there is no separate ground wire. Newer dryers however have a 4 wire cord with a 4 prong plug.
The reason this change was mandated by the national electrical code is that the 4 wire setup is.
3 wire to 4 wire dryer. Moved dryer to new location. In an existing installation such as an older home built in the 1950s it is considered code compliant for the kitchen range or the clothes dryer to be installed using a 3 wire cord and plug. Therefore the dryer s neutral was tied to the ground connection on the metal case of the dryer.
I would like to convert to 4 wire. Convert from 3 wire to 4 wire dryer outlet. Also need to know if.
Does green wire from 4 wire cord go under that screw with the green and yellow or 2. Installing new 4 wire cord and getting conflicting opinions on what to do with existing green yellow wire that is attached to dryer frame under a green screw. My dryer outlet is a three wire outlet.
Can the white wire connected to the neutral ground bus in the panel be connected to both the neutral and white on the new outlet or do i need to run a separate neutral wire back to the panel. However in new construction the installation of kitchen ranges and clothes dryers requires a 4 wire cord and plug. It has a 4 prong receptacle.
It s much easier and much less expensive to replace the 4 wire whip with a 3 wire whip. How to convert a 3 wire to a 4 wire dryer new jersey if you have an older electric clothes dryer manufactured before 1996 it probably has a 3 wire cord fitted with a 3 prong plug. The older 3p 3 wire dryer circuits are still legal and safe to use so there s no need to rewire your dryer branch circuit to install a new dryer that came equipped with a 4 wire appliance whip wire.