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Re: why ground an alarm panel.

Subject: Re: why ground an alarm panel.
From: Nomen Nescio <nobody@xxxxxxxxx>
Date: Thu, 8 Dec 2005 03:40:02 +0100 (CET)
Newsgroups: alt.security.alarms
References: <439766C8.F12337DF@xxxxxxxxxxx>

w_tom said:

>A rule for someone who intends to meet the purpose of the
>National Electrical Code and UL is simple.  If it has
>conductive parts that a human can touch, then somehow those
>parts must connect to building's safety ground system.

Would you please cite a code reference for this?  Please keep in mind that
the typical alarm control panel enclosure is 18 to 20 gauge sheet metal,
and is not equipped with a grounding terminal.  As you know, a sheet metal
screw is not an acceptable method of attaching a grounding conductor to an
enclosure, therefore a sheet metal circuit board mounting screw would not
be an acceptable method of grounding the enclosure.

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