There are several types of alarm unshielded  cables commonly used for alarm systems, and these cables vary based on their configuration, number of conductors, and gauge. Here are four main types:

1. 2-Conductor Unshielded Cable

• Usage: This is the simplest type, used primarily for basic alarm systems with minimal wiring requirements.
• Conductor Count: 2 conductors.
• Applications: Wired alarm systems, sirens, or powering low-voltage devices.
• Example: 18/2 alarm unshielded cable (18 AWG, 2 conductors).

2. 4-Conductor Unshielded Cable

• Usage: More commonly used than the 2-conductor cable, allowing for additional functionalities like data and control signals.
• Conductor Count: 4 conductors.
• Applications: Intrusion detection systems, access control, or CCTV camera installations.
• Example: 22/4 alarm unshielded cable (22 AWG, 4 conductors).

3. 6-Conductor Unshielded Cable

• Usage: This cable type offers more wiring options for more complex alarm systems or multi-zone setups.
• Conductor Count: 6 conductors.
• Applications: Multifunction alarm systems, where different components need separate wiring, such as door sensors, motion detectors, or smoke alarms.
• Example: 18/6 alarm unshielded cable (18 AWG, 6 conductors).

4. 8-Conductor Unshielded Cable

• Usage: Used for highly advanced alarm systems or integrated systems requiring multiple connections.
• Conductor Count: 8 conductors.
• Applications: Central alarm panels or systems combining security and automation controls (fire, smoke, security, and more).
• Example: 22/8 alarm unshielded cable (22 AWG, 8 conductors).

These alarm unshielded cables are selected based on the needs of the alarm system and the environment they are installed in.