Three Pole Switch Wiring Diagram – The difference from a standard switch along with a about three way switch is just one additional terminal,or connection. A 3 way switch has 2 terminals that are possibly metallic or brass coloured then one terminal that is certainly darkish colored. The silver or brass terminals are called vacationers or messengers along with the darker coloured terminal is called the most popular. If the 3 terminals look similar in shade, the most popular terminal will likely be recognized by the term “frequent” stamped on the rear of the switch.