DA had written this in response to
http://www.thestuccocompany.com/main...ts-385987-.htm
:

Aaron Fude wrote:

Are there any good
shielding ideas like using some kind of shielded conduit or wrapping
wires in foil or something like that?

Looks like you've hit a hot button issue with some of the readers here
The post actually belongs in comp.dcom.cabling group and would have easily
generated 50-100 responses in the better days of Usenet.

Anyways, with all the advice to learn and "unlearn" that you got here I
can easily imagine your head must be spinning right now. I would throw
another point of view though: by NEC (assuming you are in the USA) you are
actually required to keep 6" distance between power and signal and you
cannot use the same outlet box for terminating them. "A stud between" rule
is actually rather extreme and in many case impractical. So, if you kept
the separation to keep your installation legal, you would have eliminated
the worst-case scenario for EMI (interference). The separation is actually
a fire protection requirement but works for EMI nevertheless.

It's rather amusing to see how many black/white opinions float around here
yet no one asked what exactly would the power cable be feeding and what
the low voltage cable will be used for, which makes all the difference. A
higher load such as an AC power cable coupled to a non-balanced audio
input cable will create the hum you would not like. EMI will not create
enough current to drive speakers directly, that's true, but if you are
amplifying the noise by coupling it onto the INPUT of your audio receiver,
you will have issues. Also, an improperly installed phone cable given
enough length will pick up some hum. By improperly I mean split pairs as
in one wire from blue pair and another from orange, for example.

So, yes, it's probably not as terrible but you should not wrap your CAT5
cable around a power cable either. In any case you'd want to pass
inspection should your township decide to check on that permit... So keep
them separate.

Cheers.

DA

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