Is it true that using the same coax is permissible?

The correct choice reflects that using the same coaxial cable for multiple purposes in alarm systems is not permissible due to the potential for signal interference and degradation. Coaxial cables are designed with specific impedance characteristics and intended uses, and using them interchangeably can lead to performance issues in an alarm system.

Different systems may require distinct types of coaxial cables depending on their specifications, such as frequency range, bandwidth, and environmental considerations. Therefore, the integrity of the alarm system can be compromised if cables meant for different applications are blended.

In practice, to maintain reliable communication and functionality within an alarm system, it is essential to adhere to the manufacturer's recommendations for cable use. This ensures that all components work optimally and prevents complications that may arise from improper installations.