What is the purpose of using a dedicated ground?

Using a dedicated ground serves multiple purposes, one of which is to isolate sensitive equipment from electrical noise. This means that by having a dedicated grounding system, equipment can avoid interference from stray currents and electromagnetic interference (EMI) that may be present in shared grounds. Sensitive devices, such as computers and electronic instruments, are particularly vulnerable to noise that can affect their operation and performance.

By establishing a separate grounding pathway, these devices can function more reliably and maintain signal integrity because the noise from other equipment or systems won't affect their ground reference. This practice helps protect them from potential damage and allows for more accurate operation, making the dedicated ground an essential aspect of effective electrical and electronic system design.