Re: why ground an alarm panel.

[Mike Sokoly <secure15@xxxxxxxxxxxxx>]

Nomen Nescio wrote:
> 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.
>
NEC 70 makes NO reference or definition of "Safety Ground" or "Building
Safety Ground"