Re: What can happen if a Wall Adapter Fails?
From: dB (dmb06851_at_yahoo.com)
Date: 02/16/05
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Date: 16 Feb 2005 13:53:36 -0800
"royalmp2001" <royalmp2001@hotpop.com> wrote in message news:<1108567564.629415.104940@z14g2000cwz.googlegroups.com>...
> For safety reasons, I need to know what are the REALISTIC chances of
> 120V appearing at the output of a failed basic 12V wall adapter.
>
> I would have thought most likely the secondary or primary winding would
> most likely go open-circuit, or the smoothing electrolytic cap or
> bridge rectifier go open or short circuit....so I'm hoping that at
> worst you get 0V at the output.
>
> Can someone tell me the chances of a dangerous situation occuring.
> What safeguard could I incorporate? Would a GFCI protector do the job?
> Could I build a discreet GFCI into my circuit? Any ideas?
>
> I intend to produce a commercial project powered with a wall adapter
> that connects upto the human body.
>
> Thanks
The regulations applicable to mains powered equipment for medical use
are very stringent, at least in the U.K.
Check your local regulations.
I doubt very much that an ordinary wall adapter would meet the
requirements.
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