On Wednesday, May 24, 2017 at 10:12:02 AM UTC-4, wrote:

A protector is only as effective as its earth ground.


the part about single point bonding is 100% correct

the grounding is necessary to provide a path for lighting so it doesn't try to travel through wood etc and start a fire,
but is less important re protecting electronics

remember


there IS proper lighting protection for avionics

and there ain't NO ground rod on an aircraft.

m

I've made that exact same point about aircraft over the years to
WTom too. WTom is right on part of his rants. A whole house surge
protector with a good earth ground is the best first line of defense
against surges. Where he goes totally off the track is in claiming
that plug-in ones are totally useless. The IEEE surge protection
guide says those plug-ins are essential for appliances that are
connected to more than just AC, eg cable, phone lines, etc. And
they also say that plug-ins can offer protection for those that
can't install a whole house or don't want to. Will it be as effective
as a whole house plus the plug-in? No, but it still can offer
protection from many of the most common surges.