On May 1, 12:23 pm, bud-- wrote:
Surprisingly, the maximum energy dissipated was 35 Joules. In 13 of 15
cases it was 1 Joule or less. That is because at about 6,0000V there is
arc-over from service hot bus to the enclosure. After the arc is
established the voltage is hundreds of volts. In US services, the
enclosure is connected to the equipment ground wires, the neutral wires
and the earthing system. Arc-over dumped most of the incoming energy to
earth.
So the 100 plug-in protectors saw no surge energy - nothing that
could harm appliances - when one 'whole house' protector was properly
earthed. Arcing or diverting surge energy harmlessly in earth means
no energy for the protector to absorb - no appliance damage.
Why buy fifty $25 or $150 per appliance protectors when protection
is made irrelevant by one 'whole house' protector? One 'whole house'
protectors selling for less than $50 in Lowes makes maybe $50,000 in
plug-in protectors irrelevant? Whose profit margins are being
protected?
Why do bud's plug-in protectors see no energy? If that energy is
properly diverted to earth before entering the building, then no surge
exists to overwhelm protection already inside every appliance.
One 'whole house' protector means no plug-in protectors are needed
AND eliminates reasons for these scary pictures from fire departments,
fire marshals, etc:
http://www.hanford.gov/rl/?page=556&parent=554
http://www.westwhitelandfire.com/Art...Protectors.pdf
http://www.ddxg.net/old/surge_protectors.htm
http://www.zerosurge.com/HTML/movs.html
http://tinyurl.com/3x73ol
http://www3.cw56.com/news/articles/local/BO63312/
http://www.nmsu.edu/~safety/news/les...tectorfire.htm
Scary pictures - just another reason for earthing destructive surges
harmlessly where? Outside the building. . Keep that threat away from
papers on a desk or the carpet. No wonder telcos don't waste money on
plug-in protectors. Just another reason for earthing one 'whole
house' protector. It costs how much in Lowes?
So where is that 'plug-in protector' manufacturer spec that claims
protection? Maybe I overlooked it?
A protector is only as effective as its earth ground.