4 Wire Outlet Diagram. For wiring in series the terminal screws are the means for passing voltage from one receptacle to another. Any break or malfunction in one outlet will cause all the other outlets to fail.
This repeats until the end of the chain. This wiring is commonly used in a 20 amp kitchen circuit where two appliance feeds are needed such as for a refrigerator and a microwave in the same location. So either 6 or 8 wire.
The black wire line and white neutral connect to the receptacle terminals and another 2 wire nm that travels to the next receptacle.
So either 6 or 8 wire. For wiring in series the terminal screws are the means for passing voltage from one receptacle to another. The white neutral wire is splice to each outlet so they share the return path. Now this could be either 40 or 50 amp.
