James23912
Member
I have an electrician coning out later today to connect the new underground 4/0 4 wire underground wire to the main panel in the house, coming from the meter post 100' away, while getting things ready I have been wondering , the 4 wire that is underground has one smaller wire with a stripe, obviously the ground, but the other 3 are all the same, same size and all black with no differentiating marks that I can tell.so I was assuming we would set up the inside panel while the power at the meter box in still not connected, then connect it last, but I am wondering how we will tell which wires are the hot ones, as they run underground, I am assuming we will have to connect one or two of them at the post outside first and then go into the house to test which is live? Sounds kind of dangerous so I want to ask here before the guy comes out, he is licensed but young and works at a hospital so I want to be sure about this beforehand, he says there is a way to check which is which beforehand but I did not understand what he meant. thanks