Ground loop (electricity)

（重定向自Earth loop）

Simplified circuit illustrating a ground loop.

Fig. 1: A typical signal cable S between electronic components, with a current I flowing through the shield conductor.

Ground loop current induced by stray AC magnetic fields (B, green)

Ground loop current caused by leakage currents in the building's ground wire system from an appliance A.

In an electrical system, a ground loop or earth loop is an equipment and wiring configuration in which there are multiple paths for electricity to flow to ground. The multiple paths form a loop which can pick up stray current through electromagnetic induction which results in unwanted current in a conductor connecting two points that are supposed to be at the same electric potential, often, but are actually at different potentials.

单词	Earth loop
释义	Earth loop 英语百科 Ground loop (electricity) （重定向自Earth loop） In an electrical system, a ground loop or earth loop is an equipment and wiring configuration in which there are multiple paths for electricity to flow to ground. The multiple paths form a loop which can pick up stray current through electromagnetic induction which results in unwanted current in a conductor connecting two points that are supposed to be at the same electric potential, often, but are actually at different potentials.
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