I am wiring 6 lights in a hallway. on one end is a 3 way dimmer switch and the other a 3 way switch. some one explained to me that I needed to use 12/3 wiring. The preexisting connection is from a single pole system. Thanks for your help, i've heard at least three ways to do the job which makes me weary to try any of them. sincerely confused Kevin J.