Do you have any ideas about what is the electrical contractors? A lot of us do not know what this component in the industry do and so is it with a lot of other products. We may know that they are good for something but we might not know for what. So may i suggest that you google that word or component to find out what it is all about. So I do believe that one might have the possibility to learn more just by being curios and asking and also looking for answers. I do think that all of us should know more because knowledge is the future.