Avoiding Magnetic Induction Issues in Communication Cabling

摘要

Surprisingly high magnitude currents can flow in metallic communication cables when these cables are in proximity to high current circuits. Such high currents could cause damage or even misoperation. The following example shows how a primary current of 10,000 Amperes in one phase could induce 75 Amperes in a communication cable. This induced current could damage or affect relays, meters, and other equipment. This article offers guidelines to minimize the risk of problems in new and existing installations.