usually there is a bonding strap between the neutral and the frame that has to be removed. I cant believe there wasnt one on either appliance. Even if the circuits came from the main panel, you shouldnt hook the grounds and neutrals together on an applicance. I would double check that you dont have a jumper still in place, they are hard to see sometimes.
#61238 - 01/19/0609:45 PMRe: Wiring older 3 wire electric ranges and dryers.
Every appliance we hook-up we read the manufactures instructions, and leave it on the appliance for the inspector, as noted in the previous post, the jumper must be removed, and on the instructions they indicate where the ground wire is to be connected.
#61239 - 01/20/0602:13 AMRe: Wiring older 3 wire electric ranges and dryers.
Where I work, if the existing double pole 40 or 50 amp circuit ampacity is sufficient for the new appliance, then we re-use the the feed and leave the bonding strap in place and install (1) new 3-wire cord and receptacle.
[This message has been edited by ShockMe77 (edited 01-20-2006).]
#61241 - 01/20/0609:43 PMRe: Wiring older 3 wire electric ranges and dryers.
"The 3 wire feed was required to be on a 4 wire. Was a subfed panel."
The old dryer is of no consequence. It is only a "3-wire dryer" because that is what cord was put on it. The circuit determines what cord to put on.
Most dryers I have seen have had a green wire run from the grounding screw into the wiring harness where it was bonded to the neutral. I just remove the wire, cut off the fork terminal and cap off the wire securely. Then the cord gets wired typically with the green from the cord to the ground screw on the chassis.
"Anyone who has never made a mistake has never tried anything new." -Albert Einstein