In these cases, it should be wrapped with electrical tape to mark it as hot. The ground wires will be green and/or bare copper. The ground should be spliced with a short piece of wire and connected to each device and outlet box that has a grounding terminal. In these drawing the brass colored terminal represent the hot side of the device and the silver colored terminal represent the neutral. Ground wires and terminals are in green.
This is the updated wiring for this arrangement, with a 2-wire cable added between the fan/light and switches. The white wire is no longer used for hot and the source neutral is run through to the switch box to satisfy the 2011 NEC requirement of a neutral wire in all switch boxes. All other wiring is the same as above.
In this diagram multiple ground fault circuit interrupter receptacles are wired together using pigtails. Two-conductor cable is run between gfci’s, and the hot, neutral and ground wires from the source are spliced to the line terminals at each device. The load terminals are not used and each device provides its own, single-location protection.
In this diagram, two receptacle outlets are wired in the same box with a separate 120 volt source feeding each. Three-wire cable runs into the box. The black and red wires are hot and each is connected to one of the receptacles. The white, neutral wire is splice to each outlet so they share the return path. This is appropriate for standard duplex receptacles, but should not be used for GFCI receptacles. GFCI’s must have dedicated neutral connections to work properly.