Tunnels - stray currents

[Bridgeman]

Are stray currents a problem in tunnels when there is no electrified railway nearby?<br>
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Regards,<br>
Bridgeman

 

[Ginger]

Please could you expand on your question a little?<br>
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Ginger

 

[HScribner]

Please be a little more specific....What kind of tunnel, why are you worried about stray currents? <br>
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Thanks,<br>
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-HScribner

 

[jobeth]

I think any time there are two conductors and a dielectric in between, you have capcitance. This translates into a potential difference (voltage). Noise voltages can then be coupled to the metallic structure whether below ground or not. When you have noise voltages, you have noise currents as well.<br><br>Can anyone else build on this? <p>William H. Bernhart, P.E.<br><a href=mailto: > </a><br><a href= > </a><br>I work as a development engineer for AMP - Tyco Electronics located near Harrisburg, PA. I help design interconnections and electrical connectors for aerospace applications.