[QUOTE=westom;397519]You have completely missed the point of any protector. No protector stops any surges. What does better than a protector on cable TV? A wire. Instead of a protector, a wire does the same job better. Best protection for cable TV is an existing wire - not a protector. All phone lines already have a ‘whole house’ protector installed for free. Apparently those ‘point of use’ recommendations come without even knowing what already exists. What is required even by code and Federal regulations.
An AC mains surge approaches that SECO protector. Now a surge makes a decision. Does it go less than ten feet to earth via ground rods? Or does it go much farther inside, blow through protection already inside appliances, and then obtain earth via those appliances? Instead, a surge goes harmlessly to earth by an easier path. Via the SECO protector IF "the quality of and connection to that earthing" is superior.
I have a great deal of difficulty understanding your position on secondary point-of-use surge protection devices (SPD) in light of the standards that call for them and the experience of numerous homeowners here in The Villages. Both NFPA 780, Standard on Lightning Protection Systems, and IEEE Guide for Surge Protection Devices recommend them.
These two references mirror the expereince we have observed where an indirect lightning strike caused a surge to be either induced into the home's wiring or entered through the electric, telephone, or cable lines. Just this summer we have heard from residents of Bonnybrook, Polo Ridge, Hadley, Sunset Ridge, and Belvedere who experienced indirect lightnig surges. Where there was secondardary point-of-use SPD in place there was no damage but where there was none there was widespread electronic damage.
Further, expereince has shown that the SPD at the exterior telephone box provides little and in some cases no protection at all.
|