What type of conductors may be run together to a single appliance?

The correct answer highlights the compatibility of Class A and Class X conductors when being run together to a single appliance. Both Class A and Class X conductors are designed for use in fire alarm systems and are distinguished by their specific applications and characteristics.

Class A conductors are typically associated with initiating devices, which include smoke detectors, heat detectors, and other inputs that signal the fire alarm control panel. On the other hand, Class X conductors are used for notification appliances, like alarms and strobes, which alert occupants of a fire situation.

When Class A and Class X conductors are run together, it is crucial that they maintain the integrity and functionality of the fire alarm system. These conductors can be pulled within the same conduit or cable assembly without issue, ensuring that fire alarm signals can be transmitted properly to both initiating and notification devices.

The other options do not accurately represent compatible conductors that can be grouped together, which is why they do not qualify as correct answers. Understanding the grouping of these conductors is essential for maintaining proper signal integrity and ensuring reliable communication within fire alarm systems.