On Oct 2, 11:20*am, bud-- wrote:
Many houses have the cable/phone entry points distant from the power
service, so a short wire connecting entry protectors to power system
ground is not possible. In that case, the IEEE guide says in the
example above *"the only effective way of protecting the equipment is
to use a multiport protector."

Bud will post endlessly to avoid providing one fact. The plug-in
manufacturer spec numbers that claim protection. Oh. It only claims
to protect from a typically not destructive surge. Proper earthing
and a 'whole house' protector mean protection from all types of
surges. If the effective solution does not exist, then one can at
least protect from a type of surge that typically does no damage.

As for the typically destructive surge - no earthing and 'whole
house' protector has permitted plug-in protectors to find more
destructive paths through appliances. In some cases, no plug-in
protector would have provided better protection. But then that is
simply from an engineer again telling the sales promoter what has been
seen repeatedly over the decades.

So essetial is single point earthing that one utility even provides
suggestions how to fix defective multipoint earthing:
http://www.cinergy.com/surge/ttip08.htm

Where is that manufacturer spec that claims protection from each
type of surge? He promotes plug-in protectors and still cannot
provide that spec? No wonder he posts long rambling posts often chock
full of insults. Even the manufacturer will not claim to provide that
protection. A protector is only as effective as its earth ground.
No way around reality.