Which type of wire typically serves low voltage systems?

Bell type wire is specifically designed for low voltage systems, making it the appropriate choice for this question. It is commonly used for applications such as doorbells, intercom systems, and other low-power devices that operate at reduced voltage levels. This type of wire features a lightweight construction that supports efficient transmission in low voltage scenarios while maintaining flexibility and ease of installation.

In contrast, stranded cable is often utilized for applications requiring higher amperage and flexibility, which may not be suitable for low voltage use. Shielded wire primarily focuses on protecting against electromagnetic interference, typically in higher voltage or sensitive signal applications. Twisted pair wire, while it can be used for low voltage communications, is more commonly associated with networking and telecommunication applications, where it carries higher frequency signals rather than serving straightforward low voltage power needs.