w_tom wrote:
> Review numeric specs for any protector recommended by Bud

I recommended no ‘protector’.

> who
> forgets to mention who he is promoting for

To quote w_ "It is an old political trick. When facts cannot be
challenged technically, then attack the messenger." My only association
with surge protectors is I have some.

>
> On Page 42 Figure 8, a plug-in protector is too close to a TV and
> too far from earth ground. Surge is earthed, 8000 volts destructively,
> through an adjacent TV.

The illustration in the IEEE guide has a surge coming in on a cable
service. There are 2 TVs, one is on a plug-in suppressor. The plug-in
suppressor protects TV1, connected to it.

Without the plug-in suppressor the surge voltage at TV2 is 10,000V. With
the suppressor at TV1 the voltage at TV2 is 8,000V. The plug-in
suppressor at TV1 does not contribute to damage at TV2.

The point of the illustration for the IEEE, and anyone who can think, is
"to protect TV2, a second multiport protector located at TV2 is required."

The problem is the wire connecting the cable entry block to the power
service ‘ground’ is too long allowing a high voltage between power and
cable wires. Ethernet connections between buildings can have the same
problem if they do not enter the building near the power service. The
IEEE guide says in that case "the only effective way of protecting the
equipment is to use a multiport protector." Fortunately ethernet has
higher surge immunity than most equipment.

>
> What must Bud forget to mention? A quote from his NIST citation
> Page 8 defines an effective protector:

What does the NIST guide really say about plug-in suppressors?
They are "the easiest solution".

I made a rather brief comment about plug-in suppressors in response to
w_’s ‘magic box’ nonsense, resulting in a rant from w_.

Contrary to w_’s misrepresentation, both the IEEE and NIST guides say
plug-in suppressors are effective. The IEEE guide has 2 examples of
surge suppression - both use plug-in suppressors. (They may, or may not,
be useful for ethernet between buildings.)

w_ can not find a link agreeing that plug-in suppressors are NOT effective.

–-
bud--