dryerelectricalgroundingwiring
I recently moved into a new house which accepts a 4 prong dryer cord. My dryer, a Kenmore 110.66922501, is currently wired for 3. As wired for 3 prong, the neutral connection on the dryer has an additional green (with yellow stripe) wire attached. This green striped wire appears to terminate at a point on the chassis. When changing to the 4 prong cord, should the green striped wire be moved to the chassis to be connected with the cord’s green wire?
DO NOT connect the ground wire to the grounded (neutral) conductor, as this could lead to current flowing through the body of the dryer (and potentially through you).
The installation guide for the dryer will have wiring instructions for both 3, and 4 wire configurations. Check the manufacturers documentation for proper wiring, but I would say the first image is likely correct.
Instructions from random Maytag Installation Instructions (PDF)
After doing some research, and looking at dryer wiring diagrams. It turns out that the green/yellow wire is not a ground wire, it is a neutral to case bonding wire. When this wire is not in use (in a 4-wire installation for example), it is simply connected to the neutral terminal and is unused.
If you can remove the existing grounding wire from the grounding screw, then do that and connect your 4-prong's grounding wire to the screw.
I initially misunderstood your explanation of the existing grounding wire. If this is a wire coming from inside the dryer, then you'll likely need to connect it to the neutral lug once you've connected to the grounding screw a suitable ground from your new 4 prong cable. As said in a comment, your best bet is to consult the dryer's manual to verify this is the correct action for this step.
Best Answer
Yes, that is the most important thing you need to do!
Neutral is a power wire that handles return/balance current. It's a "hot" wire, but is near ground voltage under normal circumstances. However it can be "hot, which is why it is insulated.
On a proper and modern 4-wire dryer connection, we want neutral connected to to the electrically active parts of the machine, and the chassis attached to safety ground.
On a 3-wire dryer connection, they made the decision to bond the machine chassis to neutral. It was known to be unsafe, but was considered less unsafe than doing nothing at all, on the rationale that the wiring is rarely disturbed and the neutral is unlikely to fail (electrifying the chassis of the machine if it did).
So yes. As part of a conversion to 4-wire, you really want to remove that bonding jumper.
It should go somewhere secure where it won't flop around and hit a hot wire.
You can only put 1 bare wire on a screw, but if all wire ends have ring terminals crimped on, you can stack those.