I have a four plug cord and 4 plug wall socket except only 3 wires go to the wall plug. The dryer plug fits the wall plug but when running, arcing occurs from the supply lines. Is this safe to use?


I'm only guessing here, but it sounds like someone in the past has taken the easy way out and replaced the 3 wire wall outlet with a 4 wire outlet. Unfortunately there are only 3 of the 4 wires necessary in the wall - what they did to hook it up is impossible to know.

But if you're getting sparking from anywhere something is badly wrong. You need to find out just where those three wires in the outlet are going in the electrical panel and get a 3 wire outlet, properly wired, into the wall, followed by a 3 wire cord to the dryer. It is neither legal nor safe to use only 3 wires to hook up a 4 wire wall outlet.

Updated on February 13, 2018

Original Article:

How to Change a 4-Prong Dryer Cord and Plug to a 3-Prong
By Dan Harmon