normally just doing domestic eletrics but a client asked for a cctv system!!
the restaurant had 2 existing cameras, and they required 3 more so we wired a cat 5 to each point, using green and brown as neg and g/w b/w as positive for supply, and blue and blue and white for video connected to baluns, all new cameras were mounted connected ready to go, the client bourgt new monitor and the two existing function, but the new install none worked, when you connect the balun to the dvr it knocks the functioning cameras off??? helpp any one plz
