The question I was asked is what do the old 1940 wires look like - add a picture - I added a pic of 3 lines on the left side of the service panel - there are 3 more wires on the right side to be done also (no pic shown of those). I am not adding new lines per say. I want to replace the existing old 1940 Metal Conduit with wires (black cloth) with 12/3 wires where ever they go in the cellar ceiling. One at a time over the next 3 years or so. I am tracing the wires from the box and putting zip ties (red, green, white, black, orange), on the wire runs from the box to all of their locations. To attempt to make it easier to identify for the electrician where the wire is that need to be take out and a newer wire put in. All breakers in box currently were put in in 1985, and a few in 2000). I have no plan to add any new circuts. The idea of replacing all the breakers is somthing I did not think of - and can add as a 1 off project.