Re: why ground an alarm panel.

[w_tom <w_tom1@xxxxxxxxxxx>]

  What is legally required verses what is technically superior
or recommended are two different things.  It is also not
required to brake long before the red traffic light.  Does
that mean you routinely race up to every red light, then apply
brakes at the last minute?  Its not illegal to do so.  But
better drivers brake long before they are "required" to brake.

  No required building code demands lightning protection.  UL,
NEC, etc all make no consideration for transistor safety.
Those codes only address human safety issues.  An earthing
connection, as described by Robert Bass, is for transistor
safety. Something installed beyond what is required.  We still
build homes as if the transistor did not exist; still have no
codes for transistor safety.


  Meanwhile, cold water pipe is no longer acceptable for
grounding.  That is a post 1990 code change.  Furthermore, it
would not make a good earthing connection for other electrical
reasons.

  AC electric receptacle provides a safety ground; but is not
an earth ground.  This for electrical reasons such as wire
impedance and what that safety ground wire is bundled with.

"G. Morgan" wrote:
> Ademco manuals clearly indicate that grounding is not required.