Replacing outlet with GFCI outlet
I tried to replace a 20-year old outlet with GFCI outlet under my kitchen sink. The outlet used for the disposal and dishwasher. After I took the old one out and I found there 3 wires - red, orange and white. For the other outlet, usually it only comes with red and white for the line wires. I just wonder what is the orange wire used for? where should I hook into in my GFCI outlet? should I hook that up as a load wire? but how come that only come with 1 white not 2 white wires?