I have a single GFCI receptacle under my kitchen sink, and I want to power one end with constant power for the dishwasher and the other end with the switch leg from a switch on the backsplash for the disposal. Can this be done? I don't see the normal tab you can break on regular receptacles to do that on the GFCI.
You cannot split a GFCI receptacle, however, a GFCI receptacle is not the only way to provide GFCI protection to a circuit.
GFCI Circuit Breaker
One option, would be to provide GFCI protection to the entire circuit by installing a GFCI circuit breaker. Install a 20 ampere GFCI circuit breaker, and run 12 AWG copper conductors to the receptacle location. Then you'll simply wire a standard receptacle, in a half switched configuration.
Blank Face GFCI Device
Another option, is to use a blank face (dead front) GFCI device to provide protection.
- Install a double wide box at the receptacle location.
- Connect the wires feeding into the box to the LINE terminals on the GFCI device.
- Use the LOAD terminals on the device to feed a standard receptacle, wired in a half switched configuration.