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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: No, silver-mica caps are not safe for AC line use. posted by Al Sekela on April 13, 2007 at 15:54:10:
The only caps that are safe are those rated "X," X2," or "Y." These are designed to be self-healing after breakdown, without causing a resistive leak.It was suggested to me quite a long time ago (by an electrical technician who works for a big name aerospace company) that carefully enclosing the cap with heatshrink (which is normally quite thick) would provide that "extra" margin of safety in the rare case of a pinprick material failure, thereby creating or approximating the outer material thickness with which an X or Y cap may be made. If I were to wrap a cap, I would probably use Kapton, which if memory serves, has a heat-resistance rating of 500F as well.
In both cases, wrapping the cap also creates the benefit of additional resonance control. Your thoughts on all of this?
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Follow Ups
- Re: No, silver-mica caps are not safe for AC line use. - alan m. kafton 22:22:34 04/13/07 (3)
- The problem is an internal leak and risk of fire. - Al Sekela 14:46:12 04/14/07 (2)
- Re: The problem is an internal leak and risk of fire. - alan m. kafton 14:56:45 04/14/07 (1)
- Yes, the design and testing are the main features of the rated caps. - Al Sekela 15:43:29 04/14/07 (0)
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