Quality Cable and Wire for Professional Alarm and Security System Installations. Note that Some cables may contain Wire that has twisted Copper Conductors as Opposed to those of Solid Bare Copper Conductors. Cable Jacketing will Also Vary between Types and Classifications from CM, CL, CL2, CL3 with Riser(R) and Plenum(P) Designations. While each Serves the Same Purpose in delivery of Low Voltage and Signal Distribution, Their Use per Classification is Covered by Several Different Standards and Codes. Make sure that the Cable and Wire You Purchase Equals or Exceeds the Classification of Use as to Avoid any problems during Inspection and Validation of Your System.