Most of the intrusion alarm components Such as Sensors, Motion detectors, sirens are wired with 4 conductor alarm wire. You should do some research before installation so that you know what wires will be required.
All the wiring from intrusion alarm components should lead to the intrusion alarm control panel which is the heart of the system, So place the control panel in perfect place before starting the works. The control panel requires a power supply plus a battery backup that should also be locked up in the box.