Which of the following is NOT considered a protective device?

A CATV (Community Access Television) system is primarily focused on distributing television signals and does not serve a protective function for electrical equipment or systems. In contrast, a UPS (Uninterruptible Power Supply) provides backup power and protects against power interruptions, a voltage regulator helps maintain a consistent voltage level to protect equipment from voltage fluctuations, and a surge protector safeguards devices from voltage spikes. Therefore, CATV is correctly identified as the option that does not meet the criteria of a protective device, as its primary role is not to protect electrical systems from surges, fluctuations, or interruptions.