Which statement best reflects the typical use of stranded versus solid wire in alarms?

Which statement best reflects the typical use of stranded versus solid wire in alarms?

• A. Stranded wire is most common on alarm work
• B. Solid wire is most common on alarm work
• C. Stranded wire is never used in commercial alarms
• D. Solid wire is always cheaper in all cases

Answer: (A)

When wiring alarms, flexibility and reliable terminations matter because cables must be routed through walls, conduits, and around obstacles while enduring some movement. Stranded wire, being made of many small strands, can bend and flex far more without fatigue or breaking. That makes pulling it through tight spaces easier and reduces the chance of wiring failures at terminations in alarm devices. Devices and connectors in alarm systems are commonly designed to grip stranded conductors well, so terminations stay solid over time. Solid wire, by contrast, is stiffer and can be harder to route in confined paths; it’s more prone to kinking or cracking if bent repeatedly, which is less desirable in alarm installations. While there are occasional fixed, long runs where solid wire might be used, it’s not the typical choice for alarm work. Cost claims like “solid wire is always cheaper in all cases” aren’t reliable because price depends on gauge, run length, and installation method; overall, stranded wire is the standard in most alarm installations.

When wiring alarms, flexibility and reliable terminations matter because cables must be routed through walls, conduits, and around obstacles while enduring some movement. Stranded wire, being made of many small strands, can bend and flex far more without fatigue or breaking. That makes pulling it through tight spaces easier and reduces the chance of wiring failures at terminations in alarm devices. Devices and connectors in alarm systems are commonly designed to grip stranded conductors well, so terminations stay solid over time.

Solid wire, by contrast, is stiffer and can be harder to route in confined paths; it’s more prone to kinking or cracking if bent repeatedly, which is less desirable in alarm installations. While there are occasional fixed, long runs where solid wire might be used, it’s not the typical choice for alarm work.

Cost claims like “solid wire is always cheaper in all cases” aren’t reliable because price depends on gauge, run length, and installation method; overall, stranded wire is the standard in most alarm installations.