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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: Shielding is capacitive, not "inductive", posted by tomservo on November 7, 2006 at 07:47:07:
The maximum permissible temperature of conuctors in thermoplastic such as THW and THHN in actual use is 75 degrees C based on the limits of the ratings of what they are connected to such as a circuit breaker. Otherwise it is 90 degrees. The additional temperature rise due to modifications when air flow is resticted and heat cannot be dissipated as quickly as in free air depends on many factors but it is generally specific to the nature of the shielding and the current flow. If you need a shielded power cable that has been engineered, not a dangerous toy out of someone's garage workshop or warped imagination, the products of choice are MC and BX. They have some drawbacks. One is that they are not particularly flexible. Secondly, they are not attractive to look at although Greenfield, a similar product can be jacketed with PVC and is sold for use in areas where water may come in contact with it under trade names like "Sealtite." The real objection to it though is that it is cheap and widely available. This is an anathema to the audio aftermarket cable manufacturers who make profits on the allure of exclusive sales of exotic products with secret formulations which "improve" their performance. How's a guy supposed to make a buck if nobody belives in it?
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- Re: Shielding is capacitive, not "inductive", - Soundmind 08:57:55 11/08/06 (0)
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