What is the maximum distance a data bus can be run?

The maximum distance a data bus can be run is often determined by the specifications of the bus technology being utilized and the need for signal integrity. In many scenarios, particularly with RS-485 for example, the maximum recommended distance for a data bus can indeed be around 4,000 feet (or approximately 1,200 meters), which supports the choice of 2,500 feet as a conservative estimate for ensuring reliable communication without significant data loss or degradation.

In general, distances longer than this can introduce issues such as increased capacitance, signal attenuation, and potential interference, which can adversely affect the data transmission quality. Therefore, the selected answer aligns with common standards and practices observed in data communications and networking, where maintaining proper signal strength and clarity is critical as the distance increases.