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・ Shield of Straw
・ Shield of the Trinity
・ Shield of Thorns
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・ Shield UI Lite
・ Shield volcano
・ Shield wall
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・ Shield's Crossing
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・ Shield-Wizard Comics
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Shielded cable
・ Shielded data link connector
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・ Shielder minelaying system
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Shielded cable : ウィキペディア英語版
Shielded cable

A shielded cable is an electrical cable of one or more insulated conductors enclosed by a common conductive layer. The shield may be composed of braided strands of copper (or other metal, such as aluminium), a non-braided spiral winding of copper tape, or a layer of conducting polymer. Usually this shield is covered with a jacket. The shield acts as a Faraday cage to reduce electrical noise from affecting the signals, and to reduce electromagnetic radiation that may interfere with other devices. (For more, see electromagnetic interference). The shield minimizes capacitively coupled noise from other electrical sources. The shield must be applied across cable splices.
In shielded signal cables the shield may act as the return path for the signal, or may act as screening only.
High voltage power cables with solid insulation are shielded to protect the cable insulation, people and equipment.
== Signal cables ==

The best method to wire shielded cables for screening is to ground the shield at both ends of the cable. Traditionally there existed a rule of thumb to ground the shield at one end only to avoid ground loops. In airplanes special cable is used with both an outer shield to protect against lightning and an inner shield grounded at one end to eliminate hum from the 400 Hz power system.〔 090528 boeing.com〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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