What is a requirement for coaxial cables in relation to power conductors?

Coaxial cables are designed to transmit high-frequency signals without interference, which can be compromised if they are placed too close to power conductors. The requirement that they cannot be supported from raceways containing electrical conductors is rooted in the need to preserve signal integrity and minimize electromagnetic interference (EMI). If coaxial cables are run alongside power conductors or in close proximity, the electrical noise generated by the power lines can affect the performance of the coaxial cables, leading to signal degradation.

This precaution helps ensure that coaxial cables maintain their performance standards for carrying signals effectively, especially in residential wiring where various power sources and communication lines are used. The adherence to this standard is essential for both safety and performance in wiring installations.