Originally Posted by westom
Cable companies recommend no plug-in protectors for that same reason. Nothing stops surges. Will that silly little 2 cm component inside a Monster Cable stop what three miles of sky could not? Monster has a long history of identifying scams - then selling grossly overpriced products to those scams.
For example, Monster sold speaker wire 'with polarity' for about $60.
Take a $3 power strip, add some fancy paint and 10 cent protector parts. Sell it for how much? Because it costs more, some will recommend it.
Nothing stops surges. Protection was never about stopping or blocking surges as that Monster Cable would do. All appliances - even TV - contains significant internal protection. Anything that Monster Cable would do is already inside the appliance.
However the rare (maybe once every seven years) and destructive surge can overwhelm appliance protection. So you do what is recommended by every responsible engineering organization. From the NIST (a US government research agency):
> You cannot really suppress a surge altogether, nor
> "arrest" it. What these protective devices do is
> neither suppress nor arrest a surge, but simply
> divert it to ground, where it can do no harm.
Not stop. Not absorb. Divert (connect, shunt) a surge to earth ground where energy is harmlessly absorbed. Critical to protection is a short (ie 'less than 10 foot') connection to earth, no sharp wire bends, no splices, not inside conduit, separated from other non-grounding wires, etc. What does a responsible cable installation do? First that wire drops down to make a short connection to earth. Energy connected to earth before entering the building does not threaten appliances.
Did you cable company properly install (earth) their wire? No protector required. A less than 10 foot connection from its ground block to earth. To the same earth also used by the breaker box and a telco 'installed for free' protector.
You have this choice. Either earth every incoming wire in every cable so that surge energy stays outside the house. Or let the energy inside to hunt for destructive paths to earth via appliances.
Monster Cable does not even claim protection in its numeric specs. How to identify an ineffective protector: 1) It has no dedicated earthing wire. 2) Manufacturer avoids all discussion about earthing. Doing these things means that Monster can sell for $100 the same protector circuit selling for $7 in a grocery store protector.
For cable, earthing is accomplished with a hardwire; no protector required. For AC electric and telephone, wires cannot connect to earth ground directly. So we make that 'less than 10 foot' connection via a 'whole house' protector. Protection is only as effective as its earth ground.
Further information was posted at:http://www.avsforum.com/avs-vb/showt...php?p=16806779
Also noted - above is secondary protection. You should also inspect your primary surge protection:http://www.tvtower.com/fpl.html
I know this is an old thread, but perhaps if you are still around, you can help me understand what happened at my house.
I have cable coming underground to the side of my house. The installer ran a small (maybe 16 gauge) wire from a junction point where the orange cable from underground was spliced to the cable going into my house to a larger gauge solid wire that was wrapped around a copper rod in the ground. (The interesting thing here is that when my house was inspected, the inspector noted that my house wiring is grounded to the copper pipe and is not attached to the ground on the side of my house, it's been on my todo list to have this looked at, I've only lived in the house a few months. This is the first time this house had cable, prior to this, it had satellite, and the cables for satellite were shallowly buried in the mulch in the flower beds.)
The cable company ran a cable from the outside junction through my garage and into my basement. From there, they split it off to a cable modem in the basement, a TV and computer (USB-attached eyeTV Hybrid) on the first floor and then they ran two lines outside, up the back of the house to two upstairs bedrooms.
3 weeks ago, we had a thunderstorm. At one point, very loud boom, bright flash, a pop and the computer with the eyeTV died with a whiff of smoke. The house lights didn't even flicker. Power stayed on.
Upon surveying the damage, the cable modem was dead, the eyeTV was plugged into a USB hub and everything plugged into the hub (including the computer) was dead.
The cable box on the other main floor TV still powered on and thought it was recording shows and stuff, but there was no display to the TV. The TV was fine.
One upstairs TV and the XBox connected to it was dead. The Wii was not dead. Further trouble-shooting showed the XBox power supply was dead, the XBox itself was fine.
The other upstairs TV was fine, but the Apple TV attached to it was dead.
Everything here was plugged into a surge protector for power, but I had no surge protection on the cable lines anywhere.
I have two garage door openers. One of them was dead and on clock radio was dead (neither of these were protected by surge protectors). Also, one circuit breaker for the house was tripped. I think this was the one the TV and XBox were plugged into.
The flash and boom came from the side of the house where the cable enters. It did not come from the back where the cable runs from the basement to the upstairs.
Since this event, I have installed cable surge protectors on all of my cable lines before they enter equipment (except the cable modem, because I have heard that this really cuts internet speeds.)
When the cable company saw that I had installed these, they said they do not recommend them because they can cause problems with 2-way communication.
I told them, I wanted some sort of protection from the lightning rods they had installed on the side of my house.
So, that led me here, looking for options on how I could have protected myself in the future.
Would appreciate any thoughts.