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S. Barker S. Barker is offline
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Default 220 volt 3-wire vs. 4-wire

if the grounding jumper is properly in place, then it's just as safe as a 4
wire. IF in fact anyone was actually shocked by a dryer, then it was a
dufus installation problem, not a # of wires problem.

steve


wrote in message
...
On May 11, 2:05?pm, (Beachcomber) wrote:
- Show quoted text -


I will add that i think 3 wire is a bad idea, with a bad day it could
be a real hazard....


buy a new dryer? then get a new cord and updated outlet


Problem is - ?Many older houses are not wired for the updated outlet.
If you don't have the proper wiring at the outlet (2 hots - Neutral
-Ground), you are not allowed to install the 4 wire code-compliant
outlet (vs. the old 3 wire outlet). ?Hence the grandfather clause...

For many older houses - installing new dryer wiring would be difficult
(expensive) and involve pulling new wires and possibly ripping up
walls.

The NEC allowed the 3 wire exception to save on copper during WWII.
Then, one or two people got electrocuted by their dryers and they
decided to go back to 4 wire some years ago.

? Apparently Canada never did this. ?Anyone know for sure?


for safety its likely worth the effort.

just look at all the other updates required today, GFCI, arc fault,
getting rid of K&T to obtain insurance, replacing fuse boxes, etc etc.

wonder why the dryer exception has survived?