Get it in writing first. Have a clear understanding of where the electrical conduit is going to go. I now have over 90 feet of silver electrical conduit attached to the outside of my walls. I was told that is what code calls for. I wanted it in the attic, so it could not be seen. I have had four a/c companies come to my home and all ask the same question, why was the electrical ran outside and not through the attic. My home looks like an commercial building and I hate it.