alekz;259297 Wrote: > This is not quite correct. > > "While electrical services, telecommunications equipment, and all other > low voltage systems are required to be bonded to ground per national and > local electrical codes and industry standards for safety reasons; the > specific need to ground screened and shielded network cabling systems > is only a matter of performance. A properly bonded and grounded cabling > system carries noise currents induced by electromagnetic interference > (EMI) in the environment to ground along the screen or foil shield, > thereby protecting the data-carrying conductors from external noise. > The screen or foil shield also minimizes cabling emissions. It is these > functions that afford screened and shielded systems their superior > immunity to alien crosstalk and other sources of conducted or radiated > electromagnetic interference." > > "A standards-based UTP network cabling system requires no path to > ground. However, according to ANSI-J-STD-607-A "Commercial Building > Grounding (Earthing) and Bonding Requirements For Telecommunications", > screened and shielded cabling channels are required to be bonded > through a conducting path to the Telecommunications Grounding Busbar > (TGB) in the telecommunications room (TR). Like UTP systems, F/UTP and > S/FTP horizontal cable is terminated to outlets at the work area and in > the TR. Screened and shielded connector designs, such as Siemon's 10G > 6A F/UTP MAX and TERA® Quick-Ground outlets, automatically ground to > the patch panel in the TR during installation, without the need to > individually provide a ground termination for each outlet. The only > additional step required to ground these F/UTP and S/FTP cabling > systems is to connect a 6 AWG wire from the ground lug provided on the > patch panel to the TGB." > > http://www.siemon.com/us/white_papers/06-07-20-grounding.asp
Exactly, installing shielded cables simply makes things more complicated because you now have to verify grounding on everything. If you use unshielded cables, as almost every commercial network I've ever seen, no cable grounding is required. It is stupid. There are no real-world performance gains for CAT* ethernet networks that would necessitate shielded cables. I have personally installed, and seen installations of many networks. We _do_ install shielded cabling for very high speed interconnects like Infiniband and custom NUMA interconnects. These systems are more than 100x faster than the 100mbps network used by the transporter. They are also NOT using CAT* cable. The interconnects for audio systems are trivial compared to the requirements for networking and other communication systems. A belkin 2m CX4 cable designed for carrying 10gige can be found for 100-150 USD. -- SuperQ ------------------------------------------------------------------------ SuperQ's Profile: http://forums.slimdevices.com/member.php?userid=2139 View this thread: http://forums.slimdevices.com/showthread.php?t=42094
_______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
