I could answer all of your questions but I won't because I don't want the liability if something goes wrong. It is a very straightforward process if you have any electrical knowledge or experience. Please, please, please, if you have to ask the questions you asked, get a professional to do it for you! The cost of an electrician vs the cost of a fire (with possible loss of life) isn't worth it! And if I read it right, you had someone do it already but it is not right. Again, if that is the case, please, please,please don't use it until it is properly done and checked by a qualified person!!!!! We want everybody to be safe this holiday season!