Originally Posted by drjay9051
I have a basic wiring question but my search has not helped.
I needed to disconnect my dryer recepticle to redo some paneling
The back of my dryer has a three wire cord going into the connections behind the access panel. There is a green ground wire connected to the chassis of the dryer via screw. The ground does not seem to be connected to the three wires from the plug in any way.
In the wall is a three prong plug. 2 slashes, one L shaped and one small triangular hole in center. Plug is marked NEMA 10-30 if that helps. Here is my question: there are red and black wires going to the slash shaped openings and the white goes to the L shaped. The bare ground wire is just floating inside the box! Should this be connected to the smalll triangle shaped opening in the center of the recepticle? There is a screw behind the triangle but nothing connected.
So I have four wires into the receptacle inc. ground but only three on the dryer plug that goes from receptacle to dryer
You have a 4 wire supply (branch circuit from the panel). You then have a nema 10-30R receptacle. This is the wrong receptacle. You need a nema 14-30R receptacle that allows connection to two hots (red and black) a neutral (white) and a bare ground. Then you need a 4 wire dryer power cord (nema 14-30P).
You need to double check the dryer wiring compartment to make sure the metal bonding strap or bonding wire from the neutral terminal to the dryer metal chassis has been removed from the frame or from the neutral terminal. If it is still installed/connected to the frame and neutral terminal then the dryer has been configured for a 3 wire branch circuit ... you have a 4 wire branch circuit. So this would be wrong.
Here is a drawing of what you need to do