How to Choose a Cat Cable? Low Current Cat6-Cat8 Selection Guide

The speed and security of your digital infrastructure depend on the quality of the invisible cables.
In your low current systems, the way to prevent data loss and costly malfunctions is to choose the correct Cat standard and shielding structure.
In this technical guide, learn about the differences, use cases of Cat6, Cat7, and Cat8 cables, and how to make the best choice for your project with Pegon Proje consultancy.

1. Cat Category and Bandwidth Comparison (Cat6 vs Cat6A vs Cat7 vs Cat8)

Choosing the appropriate Cat standard for your structured cabling project's performance requirements determines your network's future expansion capacity. The following table compares the technical specifications of the most common data cables:

Cat Standard Maximum Data Hızı Maximum Bandwidth (MHz) Maximum Distance Ideal Use Case and Project Type
Cat6 1 Gbps 250 MHz 100 Metre Standard office networks, entry-level IP camera systems.
Cat6A 10 Gbps 500 MHz 100 Metre Enterprise backbone infrastructures, Wi-Fi 6/7 points, 4K imaging systems.
Cat7 10 Gbps 600 MHz 100 Metre Industrial plants, sites with very high electromagnetic interference (EMI).
Cat8 40 Gbps 2000 MHz 30 Metre Data centers, intra-cabinet high-speed connections.

2. Cable Shielding Structure Selection (S/FTP, U/UTP, F/UTP)

Another important point to consider when choosing cables in low current systems is the cable's level of protection against surrounding electromagnetic interference (EMI), rather than just its speed. The following shielding types are preferred to protect signal quality and data integrity:

  • U/UTP (Unshielded Twisted Pair): Unshielded. An economical solution for standard office environments with low electromagnetic interference.

  • F/UTP (Foil Twisted Pair): There is a common aluminum foil around all the pairs. Minimizes interaction between cable bundles (Alien Crosstalk).

  • U/FTP (Individual Foil Twisted Pair): Each pair is wrapped in its own foil. It is one of the most balanced solutions in terms of signal clarity and interference resistance.

  • F/FTP (Double Foil Twisted Pair): Both the pairs and the outer sheath are foiled. Preferred in systems requiring critical and sensitive data transmission.

  • S/FTP (Shielded Foiled Twisted Pair): The pairs are individually foiled, and the outer part is a durable metal braid shield. Mandatory for factories, transitions near high voltage lines, and challenging sites with the highest interference risk.

3. Detailed Cable Preference by Use Case and Project Type

Each system in your low current project has unique cabling requirements. Here are recommendations for some key applications:

A. IP Camera and Video Surveillance Systems (VSS) Cabling

  • Standard Applications (2MP-4MP): For cost-oriented projects, Cat6 U/UTP is generally sufficient.

  • 4K and Panoramic Cameras: Cat6A U/FTP should be preferred to prevent high data traffic and signal noise.

  • PTZ and Heated Cameras: These cameras draw high power (PoE++). To prevent the camera from shutting down due to voltage drop, 23 AWG (thick cross-section) pure copper Cat6A cables should be used.

  • Elevator IP Camera Systems: Continuous movement can break standard cables over time. "Stranded" (multi-wire/flexible) structure S/FTP cable must be used here.

B. IP Paging and Voice Alarm Systems Cables

  • Energy Efficiency and Voltage Balance: Since IP speakers are powered over PoE (Power over Ethernet), low-resistance 23 AWG Pure Copper (Solid Bare Copper) Cat6A cables should be selected to keep the voltage at the end of the line stable.

  • Interference Management and Sound Clarity: Voice packets are extremely sensitive to interference; foiled (U/FTP or F/UTP) structures must be used to prevent "hum" sound caused by power lines.

C. IP-Based Fire Detection Systems and Cable Specifications

  • LSZH (Low Smoke Zero Halogen) Sheath: The use of LSZH sheaths, which do not emit toxic gases and do not obscure visibility during a fire, is a legal requirement.

  • False Alarm Protection: Highly shielded S/FTP or F/FTP cables should be preferred for critical communication between fire panels to prevent false alarms and system downtime caused by interference.

4. Summary and Pegon Proje Low Current Consultancy

It should not be forgotten that structured cabling is not just about pulling cables; it is about designing at least the next 10 years and sustainability of the project. Choosing the right cross-section (AWG), correct shielding structure, and sheathing in compliance with standards (LSZH) ensures your system's longevity and trouble-free operation.

As Pegon Proje, we are by your side in your low current systems consultancy and project design processes to determine the most suitable data cable type for your project needs and to establish an infrastructure that complies with international standards.

Contact us at www.pegonproje.com for expert engineering support and project-specific solutions.

How to Choose a Cat Cable? Low Current Cat6-Cat8 Selection Guide