Insulation test

An electrical isolation test is a direct current (DC) resistance test that is performed between sub circuit common and subsystem chassis to verify that a specified level of isolation resistance is met. Isolation testing may also be conducted between one or more electrical circuits of the same subsystem. The test often reveals problems that occurred during assembly, such as defective/wrong component, improper component placement/orientation and wire insulation or insulator defects that may cause inadvertent shorting or grounding to chassis, in turn, compromising electrical circuit quality and product safety.

*(Quelle Wikipedia 2013)