What is the minimum size required for wire insulation in commercial fire alarm systems?

The minimum size required for wire insulation in commercial fire alarm systems is 12 AWG. This size is important because it strikes a balance between carrying sufficient current and minimizing voltage drop over longer runs of wire. In commercial fire alarm systems, where reliability and performance in the event of an emergency are crucial, using wire that is appropriately sized ensures that power is adequately delivered to all components of the system during operation.

Moreover, 12 AWG wire has the ability to handle the electrical load typically required by devices such as smoke detectors, horn strobes, and control panels, while providing mechanical strength and compliance with National Fire Protection Association (NFPA) standards. Ensuring that the wire is appropriately sized also contributes to the overall safety and effectiveness of the fire alarm system, helping to prevent potential failures that could arise from overheating or damage caused by undersized wire.