[RFI] Ethernet RFI

Ford Peterson ford at cmgate.com
Sat Jan 22 22:28:10 EST 2005

> The 8 conductors in that cable are actually 4 pairs of twisted cables.  Each
> pair is a "hot" and a ground return.
> ***Ford and the list.This is not quite true,CAT5 cables and connectors are
> designed to be balanced with respect to ground.If one side or the other
> (normally nominated as + and - however nothing to do with DC polarities) is
> connected to ground then the balance is destroyed.Normal copper telephone
> lines are balanced wrt ground and the "CAT5" cabling was designed to
> continue the balance into consumers premises.
> Brian Goldsmith. 

I respect your correction.  But my point is absolutely true.  Each "pair" is designed to work as a pair.  Wiring the cables in ANY configuration that retains the pairs the way they are designed will retain the 'shielded' nature of the twisted pairs.  

John-W0UN was good enough to find and post an excellent on-line tutorial about how to wire the cable connectors.  Follow the accepted norms and you will be fine.  I'm willing to bet my next paycheck that the noise will be gone if they are properly shielded by retaining the 'pairs' in the proper sequence.  My reference to + and ground return was for illustration only and had no intention of indicating that they are DC biased...

ford at cmgate.com

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