Which statement about solid wire being used in fire alarm cable is true?

Which statement about solid wire being used in fire alarm cable is true?

• A. Solid is the industry standard for most fire alarm cable because it is easier to terminate and lower cost
• B. Solid is never used due to termination difficulties
• C. Solid is always more expensive than stranded
• D. Solid cannot be used in commercial alarms

Answer: (A)

Solid conductors are chosen in fire alarm cabling because how a wire terminates and how much it costs are the practical factors in most installations. A solid conductor seats firmly in terminal blocks and device terminations, reducing the chance of loose strands or unreliable connections. It’s also generally cheaper to produce and install for fixed runs in walls and ceilings, where the cable won’t be bending and flexing. That combination—reliable terminations and lower cost for standard, fixed installations—makes solid wire the common choice in fire alarm cable. Stranded conductors offer more flexibility and are used in situations with frequent bending or movement, but they can be more costly and can complicate termination in some terminals. So, the statement that solid wire is the industry standard because it’s easier to terminate and cheaper is the best description of why it’s preferred in typical fire alarm cabling.

Solid conductors are chosen in fire alarm cabling because how a wire terminates and how much it costs are the practical factors in most installations. A solid conductor seats firmly in terminal blocks and device terminations, reducing the chance of loose strands or unreliable connections. It’s also generally cheaper to produce and install for fixed runs in walls and ceilings, where the cable won’t be bending and flexing. That combination—reliable terminations and lower cost for standard, fixed installations—makes solid wire the common choice in fire alarm cable.

Stranded conductors offer more flexibility and are used in situations with frequent bending or movement, but they can be more costly and can complicate termination in some terminals. So, the statement that solid wire is the industry standard because it’s easier to terminate and cheaper is the best description of why it’s preferred in typical fire alarm cabling.