This can be caused, for example, in a signal circuit referenced to ground, if enough current is flowing in the ground to produce a voltage drop and cause two ground points to be at different potentials. In an electrical system, a ground loop or earth loop occurs when two points of a circuit are intended to have the same ground reference potential but instead have a different potential between them. ( Learn how and when to remove this template message) ( July 2014) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.
