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.
Dryer power cord 3 prong vs 4 prong.
Therefore the dryer s neutral was tied to the ground connection on the metal case of the dryer.
Up until the mid 1990s 3 prong outlets were the standard used in american homes.
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I believe this is what batsplat is asking.
4 prong dryer cord to match your outlet.
The process is relatively simple and this is usually the best way to deal with the situation when your dryer cord doesn t match the dryer outlet present in your home.
So i had to change it.
Turn the power back on and turn on the range to test it out.
Converting a dryer outlet or dryer cord yourself.
Changing a dryer cord from a three prong to a four prong or vice versa is an easy project for most people.
Leave the outlet as is 3 prong use a 3 prong dryer cord leave the ground terminal on the dryer unconnected and use a 2 pole gfci breaker.
Unfortunately few people understand the difference between 3 prong and 4 prong dryer cords.
Haozhun aug 24 at 8 57.
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Old house has a 3 prong dryer cord outlet but my dryer has a 4 prong cord.
Plug the range into the outlet.
Therefore it is code compliant to continue to use your existing 3 prong outlet and simply replace the 4 prong cord on the appliance with a 3 prong cord that matches your existing outlet.
And i don t see anything wrong with that approach.
Make sure the power to the range outlet is off.
The connections are very simple on the appliance and the screw terminals will usually have indications as to which wire connects where.
If you re not comfortable with replacing the cord yourself the technicians at fred s appliance service are available to install a new 3 prong or 4 prong cord onto your range.
Almost all manufacturers sell dryers without a cord attached allowing you to select 3 prong vs.
Do not plug a dryer cord into a receptacle unless it is properly and completely connected to the dryer.