Alarm System Wiring - Home Security Systems Answers Alarm System Wiring for the Main Panel. Hardwired home security systems need some basic alarm system wiring for main panel operation. This allows charging the backup battery, arming and disarming the system, sounding alarm conditions, and communicating with a central station. Home Alarm Wiring for a New House - Home Security Systems Home alarm wiring is needed to interconnect the parts of all hardwired home security systems. The main alarm panel needs wiring to all home security components in the system, as well as to power, telephone, and any other input or output devices you may want.