In the course of routine remodeling (as if there were such a thing), contractors are likely to encounter electrical problems. These range from minor details that can be handled on the spot by anyone with a reasonable degree of experience to serious defects that should only be corrected by a licensed electrician. Accurately identifying these situations is important both for your reputation and the safety of everyone involved. Recently, we asked electrician Cliff Thomas, owner of Hands-On Electric in Santa Fe, N.M., about some of the electrical quandaries remodelers are commonly faced with.