When there are two or more paths to ground, they can form a loop that will pick up all sorts of environmental electrical and magentic interference. Fixing a ground loop is as simple as breaking it ...

Grounding of electrical systems is an often forgotten ... of the ways he attempted to fix a common problem known as a ground loop. Ground loops occur when there are multiple paths to ground ...

There is no electrical current in optical fibers, and Ethernet adapters are electrically isolated from earth ground. See ground loop and ground. THIS DEFINITION IS FOR PERSONAL USE ONLY.