Which type of wire is typically used from the transformer to the alarm panel?

• A. Solid
• B. Coaxial
• C. Stranded
• D. Shielded

Answer: (C)

Flexibility in the power run from the transformer to the alarm panel matters. Stranded wire is made of many small strands, so it’s far more flexible and easier to pull through walls or conduit and around corners without kinking or breaking. This durability is important for the low-voltage power feed that may have to navigate tight spaces and bends. Solid wire, while it conducts well, is stiff and more prone to fatigue at bends, which can lead to breaks over time. Coaxial wire is designed for signal transmission rather than power delivery, and shielding adds unnecessary cost and stiffness for a standard power run. So, using stranded low-voltage two-conductor wire is the typical, practical choice for this connection.