Quote:
Originally Posted by midtrans
I've only ever seen differing stove and dryer plug configurations. The three-blade types from back in the day appeared to be about the same size, but the dryer configuration had an one L shaped blade. I'm quite sure different conductor sizes are the chief reason for the deliberate incompatibility: Dryers are typically fused for 30 amps, stoves for 50.
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Range cords are 6AWG, Dryer cords are 10AWG.
In the 50's and early 60's, it was common to see range cords on dryers, but the receptacle was wired for 30amps.
The NEMA configurations were changed in the late 60's To what is used today.
The range and dryer cords were changed to 4 conductor, to separate the neutral return and the equipment grounding conductor.
It's been the practice in Canada longer than the US.
