What does the code say for the following scenario is it acceptable or no?
I have Aluminum 500MCM single phase ( 2 lives , 1 neutral) from my supliers transformer to my main panel to a 400A disconneect, then 1/0AWG and 2/0AWG copper wires to sub-panels from all my subpanels and copper grounding.
I just want to know if mixing of aluminum and copper in a system in this way.
I have Aluminum 500MCM single phase ( 2 lives , 1 neutral) from my supliers transformer to my main panel to a 400A disconneect, then 1/0AWG and 2/0AWG copper wires to sub-panels from all my subpanels and copper grounding.
I just want to know if mixing of aluminum and copper in a system in this way.