What type of line should always be treated with caution similar to electrical lines?

Telecommunication lines, like electrical lines, carry signals that can create safety hazards if not handled properly. Although they do not carry high voltage electricity, they can be subject to high-frequency signals or involve electrical components, which may present dangers such as shock or interference. Additionally, mixing up telecommunication lines with electrical lines can lead to disruption in service for communication systems, which is critical for safety and operational functions.

In comparison, while gas lines carry flammable substances and require caution due to the risk of explosions or leaks, the context of the question specifically relates to lines with electrical safety considerations. Water lines and fiber optic lines, while they may present their own hazards, do not involve the same level of electrical risk associated with telecommunication systems that can behave somewhat similarly to electrical lines, especially in terms of physical handling and installation practices.