North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: fast ethernet limits

  • From: Måns Nilsson
  • Date: Sun Jan 12 14:02:26 2003

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



- --On Friday, January 10, 2003 17:53:11 -0500 blitz <[email protected]>
wrote:

> 
> AGREED, one end and one end only, or youre asking for a ground
> loop....ground the end with the best, shortest path to earth
> ground.....in his case, that would prob be the telco room end, "usually"
> theres a decent ground there somewhere..... Mileage may differ...

Some hours reading the back issues of the journal found at
http://www.compliance-club.com will hopefully inform you why star grounding
is a thing of the past. Ground both ends. If you are afraid of ground
loops,  place a heavy (as in 10-16mm2 or AWG way below 10) ground conductor
alongside the signal cable, and ground it firmly in both ends. That will
take the current away from the shields. 

Ungrounded shileds are inefficient for EMI and RF shielding, while at times
efficient AC hum blockers. 

And, IANAEE, but I've played with big sound systems that exhibit all these
problems. 

- -- 
Måns Nilsson            Systems Specialist
+46 70 681 7204         KTHNOC  MN1334-RIPE

We're sysadmins. To us, data is a protocol-overhead.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (OpenBSD)

iD8DBQE+Ibr902/pMZDM1cURAt+XAKCFc+MVCS5WfkfJGCk5yO+iSVNtEQCfR3Ri
85ebf8wkeypAWWkuRaHbnis=
=GiNg
-----END PGP SIGNATURE-----