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'[EE] NEC code reference for 70V audio'
2007\02\27@171339 by alan smith

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I know there are a few audio guys on the list.  I'm looking for the section in the NEC code that deals with 70V audio, anyone know?

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2007\02\27@174559 by David VanHorn

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On 2/27/07, alan smith <spam_OUTmicro_eng2TakeThisOuTspamyahoo.com> wrote:
>
> I know there are a few audio guys on the list.  I'm looking for the
> section in the NEC code that deals with 70V audio, anyone know?


Low voltage, limited energy (though we used to run 300W of muzak through
them)

2007\02\27@185617 by Rich

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The 70.7 volt audio, I believe, is not regulated by NEC.  However, I am not
absolutely certain of that.  It is intended for audio transmission to
multiple speakers in a commercial building PA or in a department store and
so on in order to avoid the impedance mismatch and large load currents or
higher load voltages.  The 70.7 volts is constant.  I installed it in an
apartment building in upstate New York and the electrical inspector did not
include it in his inspection, he said because it was audio.




{Original Message removed}

2007\02\27@185704 by Rich

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You might try searching under intrinsic safety.

----- Original Message -----
From: "alan smith" <.....micro_eng2KILLspamspam@spam@yahoo.com>
To: "Microcontroller discussion list - Public." <piclistspamKILLspammit.edu>
Sent: Tuesday, February 27, 2007 5:13 PM
Subject: [EE] NEC code reference for 70V audio


>I know there are a few audio guys on the list.  I'm looking for the section
>in the NEC code that deals with 70V audio, anyone know?
>
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> with Yahoo! Mail for Mobile. Get started.
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