What is the minimum wire size required for connecting bells, sirens, or control circuitry?

The minimum wire size required for connecting bells, sirens, or control circuitry is 18 Gauge. This size is typically chosen because it provides a balance between sufficient current-carrying capacity and the flexibility needed for installation within various environments.

Using 18 Gauge wire ensures that the circuitry can adequately handle the electrical load of bells and sirens while minimizing potential voltage drop over the distance of the run, which can be crucial in maintaining effective operation. Additionally, 18 Gauge wire is generally easier to work with in terms of bending and routing through different spaces, making it a practical choice for these types of applications.

Larger wire sizes, such as 16, 14, or 12 Gauge, while they may be capable of handling more current, are often not necessary for the lower power requirements typical of bells and sirens, leading to potential over-specification and increased installation costs without added benefit.