While they can both effectively power a traditional dryer the 4 prong model contains an extra grounding wire as a preventive measure.
Dryer power cord 4 prong to 3 prong.
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A 3 prong dryer cord was the standard for dryers prior to 2000.
Existing homes may still use 3 prong outlets.
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Unfortunately few people understand the difference between 3 prong and 4 prong dryer cords.
In an effort to shed some light on this subject we re going to discuss the purpose of these cords and why there s a growing popularity for 4 prong cables.
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In recent years most dryer manufacturers have adopted the 4 prong electrical cord over the dates 3 prong model.
Therefore the dryer s neutral was tied to the ground connection on the metal case of the dryer.
The national electrical code currently requires 4 prong dryer outlets in all new home construction.
The switch to a 4 prong outlet was due to a flaw in the 3 prong outlet design.
Before the mid 1990s most electric clothes dryers operated with three prong plugs that fit into three slot outlets but since 1996 the electric code has required four slot.
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