Where does the IEEE says one must protect all zones? The
spec defines what a protector would confront in each of three
zones - A B and C. Where does that say such is required in
each zone?

The utility is provides a primary protector. Inspection of
is demonstrated in:
http://www.tvtower.com/fpl.html

Secondary protection is also called 'whole house'
protector. It too is defined by the quality of and connection
to single point earthing.

So where specifically is this IEEE demand for a third
protection layer? And how does this protection layer do
anything without a short connection to earth? IEEE defines
three zones. That definition only defines what the protector
would confront in each zone - so that protector can be
designed also for human safety reasons. That does not say all
three zones must be protected. Where specifically does the
IEEE demand protection in all three zones? They define three
zones. But where do they require protection in each?

SQLit wrote:
The IEEE says if your going to install surge protection you need to protect
2 of the 3 zones. Zone 1 is out cause that is the utility. That leaves
Zones 2 and 3. Starting with your whole house surge protective device. It
has a let through of XXXX and then with the point of use protector it is an
incoming rating of YYYY. As long as the whole house let-through is less
than the point of use your as good as it gets, cheaply.

Your garage door opener my advise a surge protector as well as your
microwave and clothes washer/dryer mine all do.

The real problem is most of the cheapy stuff is based on MOV's, metal oxide
varistors. These are tested ONCE for UL. Not twice or 3 times. ONCE.
Do not forget to surge protect the coax, feeding your equipment.

Do you have a scope on your hunting rifle? What did you pay for the scope?