On Sun, 03 Jun 2018 14:23:14 -0400, Clare Snyder
wrote:

On Sat, 02 Jun 2018 23:44:49 -0700, OFWW
wrote:

On Sun, 03 Jun 2018 02:04:58 -0400, J. Clarke
wrote:

On Sat, 02 Jun 2018 22:25:03 -0700, OFWW
wrote:

On Sun, 03 Jun 2018 00:38:01 -0400, J. Clarke
wrote:

On Sat, 02 Jun 2018 21:03:30 -0700, OFWW
wrote:

On Sat, 2 Jun 2018 19:53:25 -0500, -MIKE-
wrote:

On 6/2/18 7:37 PM, OFWW wrote:
On Sat, 2 Jun 2018 16:26:12 -0500, -MIKE-
wrote:

On 6/2/18 10:11 AM, Puckdropper wrote:
-MIKE- wrote in news

Funnier part... finding this pipe under the pad distracted me so much
that I forgot that I had already figured all this out. :-)
I can't use that path because it I would have to take a hard right
turn and then another left to go around the end of the septic system's
leach field. I don't like the prospect of pulling #6 through those
bends on a 100'+ run.

On the far edge of the driveway is a row of 80ft Poplars. Because I
don't want to dig through their major roots, I can't use a ditch-witch
to trench that path.

At the corner of the garage where I intended to start the underground
conduit, there is an expansion joint in the parking area pad with
asphalt expansion joint filler. The path along that joint is far
enough away from the leach bed and far enough from the tree roots that
I can go straight back along that expansion joint.
All I have to do is rent a concrete saw and make one cut a few inches
from the existing expansion joint and then fill it back in with
Quickcrete when I'm done laying the conduit.

That will be easier than hand digging a trench around 3-4" tree roots
and trying to weave the conduit over and under them.



My most recent wiring project was running outdoor rated CAT6 out to the
garage. You're already digging for one set of cable, might it be worth
digging for another? (Cat6 is easy to terminate, just use a punch down
connector and a decent punch tool.)

You can't run network cable close to power cable, though, unless you take
certain precautions. Parallel runs are a bad thing, but if you must go
close to power cables you can enclose the cable in a grounded pipe. I
didn't run in to these problems with my cable run, so I didn't research
them further.

Puckdropper


My buddy is an IT guru and he told me to run CAT10 with the AC and I'd
be fine.

I am Cisco certified, it is not recommended.


60 cycle interference?

In is unsafe to take a chance with high voltage crossing over to a
consumer device. There is also the electromagnetic effect, especially
on an A/C system with its varying loads. On systems with variable
speed drives there are multiple problems, and it is also a Code
violation in most places. It is not even recommended to mix land line
phone lines in the walls, or conduit, and any box.

The twist in CAT cables knocks out a lot of noise but not all noise.

There are more technical reasons as well, but I'd have to look it up,
I just recently threw away all my books, manuals, etc. figuring I have
been retired long enough that I'd not ever need them again.

The code violation is the real issue. A 250 Mhz circuit is not going
to even see 60Hz unless it's of such magnitude that it generates an
arcover in the isolation transformers.

Note that phone line considerations are different from data. 60Hz is
audible--if you've got 60Hz interference on a phone line you can
_hear_ it. A 250 MHz data line is another story.

It isn't as cut n dry as you might think. Run a scope on the signal
look for the interference. If what you said were true you wouldn't
need a certain amount twists per a foot of Wire.

Twisted pair ethernet is unidirectional on a given pair. Gigabit uses
four pairs, two carrying signal one way and two carrying it the other
way. It's crosstalk on those pairs that is the major driver in the
spec.

Why the shielding?
Sheilding handles the differential mode, while the twist handles the
common mode

With high bandwidth applications on the rise and network systems
venturing into new areas such as factory environments, the need for
shielded Cat 6 cable has also increased. In these new areas of
installation, the environment in which the network cable is run has a
large amount of EMI (Electro-Magnetic Interference). Although Cat 6
cables have improved cable twist to handle gigabit Ethernet and reject
noise, this by itself is not enough for environments that have high
EMI. Using a shielded Cat 6 cable will help in these high EMI
installations.

Which I had mentioned earlier is one of the reasons for separating
main power lines from network cabling.

But enough of this, I am here for the word working, not the trap of
arguments. I am not pointing this at you either.