for the Main Panel Power Wiring. A home alarm system is powered by a low-voltage transformer,..Telephone Wiring. It’s always a good idea to run telephone wiring for the security panel,..Alarm System Keypad Wiring. Keypads are used to arm and disarm the security system,..Sirens and Sounders. Sirens are your best method to alert a would-be thief..More Alarm System Wiring - Home Security Systems Answers Was this helpful? Home Alarm Wiring for a New House - Home Security Systems With the main panel up and working, you’ll need some way to detect an intruder. Home alarm wiring for detection devices commonly include: Door sensors Window sensors Motion detectors Glass break detectors; Door and window wires should be 2- or 4-conductor, while powered devices like motions and glassbreaks need 4-conductor. How to Troubleshoot Alarm Panel Wiring Some home security systems use “end-of-line” resistors, or EOLR’s for zone supervision. These are shown on alarm wiring diagrams, which are in the installation manual, and often inside the lid of the main panel box.