It is my understanding that outlets can have wires connected on both sides. Example from another DIY.SE question here . If I have aluminum wiring. I want to add another downstream outlet. I will use an appropriate CO/ALR outlet. I will verify that the circuit can handle the additional load.
Can I have aluminum wiring on one side of a socket and copper on the other?
I am specifically asking if this AL to CU junction can be handled by the two sides of an outlet as opposed to an AlumiConn or Tyco connector.
Some CO/ALR wiring devices that are available are old stock and should not be used. The indium plating used on the screw terminals of some brands degrades with time, so the devices have a limited shelf life. Inspect the screw terminals and the terminal plate. If the terminals have a fresh metal look, they are probably OK. If the screws and/or terminal plate look tarnished or off-color, do not use them with aluminum wire, as the long-term performance and safety would be questionable.
" However, the CPSC does not recommend any CO/ALR devices. Only COPALUM or Alumiconn