How to wire a point:-

DC = Three wires, one switch and a PSU

DCC = Just two wires! (plus a accessory decoder, 2 bus wires, snubber, sub district circuit breaker, booster, control bus Cat5e wire, Command station, PSU, Cab Bus Cat5e wire, Cab Bus exchange connection, Cab wire, Cab controller or Wireless cab control interface, Computer and software/programming)