On 1/31/2011 12:13 PM, William Sommerwerck wrote:
The "parallel" components (such as MOVs) in a surge suppressor will have
some effect on every other parallel line (lines connected to the same
phase). It doesn't matter whether any device is attached to the suppressor,
or is turned on.




Sigh.... NO.

Parallel though they may be, they really only protect things
that are "beyond" (or very close) to them. Other branches
have enough series impedance as far as transients are concerned
to deliver on hell of a spike regardless of what a MOV is doing
50-100' of wiring away

Jeff