What is an essential requirement for coaxial cable installations according to Article 820?

Coaxial cable installations must adhere to specific requirements to ensure safety and performance. One essential requirement highlighted in Article 820 is that coaxial cables cannot be mixed with electrical light and power wires. This distinction is critical because coaxial cables are designed primarily for low-voltage communication signals, while electrical light and power wires carry higher voltages. Mixing these types of cables can lead to interference, signal degradation, and potential safety hazards.

For coaxial installations, it is important to maintain proper separation from power lines to minimize electromagnetic interference (EMI) that can distort the signals carried by the coaxial cable. Additionally, keeping these cables separate helps to ensure compliance with safety codes and standards that govern electrical installations, as well as maintaining the integrity of the communication signals that coaxial cables transmit.