On Tue, Jan 29, 2002, Shaul Karl wrote about "How important it is to a have shielded Ethernet cables for out of the building usage?": > Suppose I will put a shielded cable and have it go to a wall outlet. > Having it tied to the electricity ground (green/yellow wire) is a major > pain, which is why I plan to have it connected to the computer chassis > by a shielded Ethernet cable _only_ when a PC is actually connected to > this wall outlet. Is this a good policy as far as a lightnings are > concerned?
Not likely ;) If the lightning's path involves conducting through a thin wire, your computer's chassis, and only then back to the ground wire, be prepared for your computer to toast (or at a worse case: your wire to burn and start a fire). If you need to conduct a lightning, better use thick conductors (e.g., water pipes) direct to the ground. I hope the engineer designing your building knew what he/she was doing, and lightning will never reach small conductors on your walls... Note that new buildings built nowadays do not have antennae. Now that I think of it, I hope that the one I live in has some sort of anti-lightning solution.... > Can one claim that the twisted pair structure of an Ethernet cable and > the cable TV itself being shielded is an adequate protection against > cross talk between the cable TV and the Ethernet cable? Yes. The UTP cable and differential signaling on the pairs should provide good protection against low-energy cross-talk. -- Nadav Har'El | Tuesday, Jan 29 2002, 16 Shevat 5762 [EMAIL PROTECTED] |----------------------------------------- Phone: +972-53-245868, ICQ 13349191 |We are Microsoft. You will be http://nadav.harel.org.il |assimilated. Resistance is futile. ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
