On Wednesday, October 2, 2013 8:25:12 AM UTC-4, wrote:
François Martzloff and Don Worden provided much of the initial inspiration.

And so Francios Martzloff says in his IEEE paper what is also demonstrated by page 33 (Adobe page 42) figure 8. The figure shows damage when a surge is permitted inside the building. And when a plug-in protector is used without properly earthing a 'whole house' protector. 8000 volts connects to earth destructively via any nearby appliance. Damage even to one not connected to that protector - TV2.

Martzloff defines damage to appliances created by plug-in (point of connection) protectors:
Conclusion:
1) Quantitative measurements in the Upside-Down house
clearly show objectionable difference in reference
voltages. These occur even when or perhaps because,
surge protective devices are present at the point of
connection of appliances.

For over 100 years, protection has always been about connecting to earth BEFORE a surge can enter a building. So that hundreds of thousands of joules dissipate harmlessly outside. That requirement has never changed despite so many denials here. Every facility that cannot have damage ALWAYS earths surge harmlessly in earth. Connecting that current to earth low impedance either by a wire or a 'whole house' protector.

In some facilities, an employee might even be fired for using plug-in protectors. Even a fire risk from plug-in protectors is too great and unacceptable.

Most important in every facility that cannot have surge damage is the most critical component of every protection system - earth ground. I believe the US military's manual "Grounding, Bonding, and Shielding for Electronic Equipments and Facilities" requires that ground for equipment protection to be inspected annually. Because it is that essential to surge protection.

IEEE Guide even says this repeatedly. Another paragraph from the Guide that requires a short (low impedance) connection to earth:
These large currents can only be dealt with by a direct
connection to the building or power panel ground. The
NEC/CEC are very explicit in requiring this connection,
and it has been required for many years. The NEC/CEC
specifically forbid using separate ground rods for individual
lines/equipment/protectors, unless the ground rods are
connected (bonded) to the building ground (NEC Art. 800.40). ...

Plug-in protectors does not provide this and will not discuss this. Effective protection is defined by and requires single point earth ground. That means the better and less expensive solution - one 'whole house' protector..