I'm trying to install a GFCI outlet on our (110v) washer and dryer. I turned off the breaker and confirmed that the outlet was off. The I opened the outlet: it has one red wire, and two white wires attached. I figured as usual red was hot, white neutral, with white looping on to some other outlet. But then I got a shock off the white wire. I measured the voltage between the two white wires and I get 110v. If I measure between the red and either white wire I get no voltage.
Can someone explain to me what's going on here? Are the colors just backwards? And why does the breaker turn off the outlet but I still get voltage on the line?