"GregS" wrote in message

In article , "Arny
Krueger" wrote:
"GregS" wrote in message

One thing I like about local surge suppressors, they
help protect equipment from other equipment.

Whole-house protectors have similar or even greater
benefits.

If power fails, the
feedback from large transformers into the next outlet is
possible.

Whole-house protectors protect the whole houseful of
equipment, whether it has local surge supression or not.

Having it close by is helpfull.

Not having it is not helpful at all, and not having it is
quite clearly a widespread situation if you rely on local
surge supressors.

I think the whole house units should be there, in place,
by the electric company for free. They are really very
good.

The really good part I agree with. I don't know about the
responsibility of the electric company to provide them.
Around here the phone company puts some kind of surge
supression on their lines, and maybe the electric company
should follow suit. OTOH, they are pretty much a waste in
dense urban contexts.

I was pointing out, that a spike from
equipment on the same strip goes to the next piece of
equipment long before it gets a chance to get back to
the breaker box.

The power line distance from appliance to appliance within a
house is minimally at about 12 feet, the length of two
standard 6' power cords.

The power line distance from a point to the power entrance
is maximally about 100 feet, unless your house is relatively
large or laid out funny.

Impulses probably travel down power lines in a house at
maybe 0.6 the speed of light or 589,248,000 feet per second.
The path length difference is about 90 feet. The time delay
involved is less than 200 nanoseconds.

A standard Tripplite surpressor has all the basic things
that should be there.

I'll agree with that because you say so.

The big RF coils also slow down the spikes so the MOV's
work better.

It's true that MOVs respond in about 100 nanoseconds, but by
most accounts thats a bit of overkill. A 200 nanosecond
spike can't have much energy in it unless its peak voltage
is astronomical. In 200 nanoseconds, a typical inductive
kick from a power transformer (your earlier example) hasn't
built up very far...