Which of the following is a precaution when installing Cat5 cables?

• A. Use proper cable ties
• B. Kept separate from power circuits
• C. Don't pinch cables
• D. Don't apply too much pressure when pulling cables

Answer: (B)

Keeping low-voltage data cables separated from power circuits is essential for preserving signal integrity and meeting code requirements. Power cables generate electromagnetic noise and transients that can couple into nearby Cat5 pairs when run in parallel or in the same enclosure, causing increased error rates, slower performance, and unreliable connections. If the runs must cross, do so at a right angle to minimize coupling, and maintain proper separation or barriers as specified by applicable codes. This precaution directly protects the Ethernet signal, which is designed for clean, low-noise conditions. While other practices like securing cables neatly, avoiding pinching, and not pulling too hard are also important for a good installation, the primary safety and performance concern here is keeping data cables away from power circuits.