Originally Posted by wrvond
There's no reason you can't install more than one GFCI in a circuit. In fact, the installation instructions specifically address how to connect more than one in a series circuit.
You can add multiple duplex outlets to one GFCI outlet. I think if you check the installation instructions it shows you the terminals to add the down line duplex outlets ( non GFCI, standard ac outlet). The GFCI needs to be the first outlet ( connected to breaker) in the series chain as it is the outlet that has the circuit that senses all the current being fed to all the loads (multiple ac outlets). If the same amount of current going to all the loads is not sensed coming back from all the loads then the GFFI trips. This is a very small amount of current, as low as a few milliamperes. So, if you should conduct electricity through your body to ground the GFCI will sense it
There is no reason to have more than one GFCI outlet on a series of ac outlets and it must always be the first outlet from the breaker power.