Copper theft has become a major crime in the United States, thanks to record prices for the metal and hard economic times. As a New York Timesarticle put it, the current conditions have “spurred a resurgence in the past several months in the theft of common items that in better economic times might be overlooked — among them, catalytic converters from automobiles and copper wiring that is being stripped out of overhead power lines, tornado warning sirens, coal mines and foreclosed homes, where thieves sometimes tear down walls to get to copper pipes and wiring.”
Add dirty hands, dust buildup, vandals, salt spray, electromagnetic interference and even explosions to the rain, sleet, snow and the gloom of night that can affect operation of access control systems, and especially readers in harsh conditions. And there is the stress on readers that must handle intensive traffic or electrical situations that can knock out gear for a period of time.
