A switch includes a printed circuit board and a contact piece with first and second contacts. The printed circuit board has a power input contact, a power output contact, a noncontact area, and a plurality of signal contacts that are disposed at a plurality of predetermined positions. The power input contact and the plurality of signal contacts are disposed on the printed circuit board such that, upon movement of the first contact from the noncontact area to a signal contact, the second contact will align with the power input contact prior to the first contact aligning with the signal contact.