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The Daring Dufas[_8_]

On 4/15/2013 10:33 AM, wrote:
On Apr 15, 7:53 am, The Daring Dufas the-daring-du...@stinky-
finger.net wrote:
On 4/15/2013 7:08 AM, Art Todesco wrote:

On 4/14/2013 10:46 AM, The Daring Dufas wrote:
On 4/14/2013 7:13 AM, Art Todesco wrote:
On 4/12/2013 6:57 PM, Art Todesco wrote:
I know that you are not allowed to mix, say a low voltage line in a
conduit with line voltage wires. My question is, can you mix them if
either the line voltage wires or the low voltage wires are in their own
"conduit" inside of the larger conduit? I have a 2" diameter plastic,
flexi conduit going from my house to an area out by the road. Right
now
it is used to bring 120 volts to a post lamp and an outlet in its base.
Now, if I wanted to run some low voltage lines, could I put them in a
piece of Greenfield (grounded of course) and run that Greenfield with
its low voltage wires, through the same conduit?

Thanks to all who replied. Some of my questions were curiosity based on
stuff that I am or will be working on. I do have a 2" plastic conduit
which presently has 120 volt UF cable in it for the said post lamp.
Other low voltage things might be a speaker line or 12 volts for
landscape lighting.

In addition, my subdivision has a gate at the entrance. The gate
controller has the ability to allow a visitor to look up each resident
and call the resident. The resident can, via phone keypad, open the
gate. Right now there is no phone line connected to the gate
controller. However, there is a phone line about 30' from the gate
controller, which is owned by me, but it must cross the asphalt. There
is a 3" (I think) conduit under the asphalt. The possibility is run the
phone line through that conduit to the gate controller. There are 120
or 240 volt lines in the conduit. So, the phone line should probably be
run using an ENT or equivalent, inside the original 3" conduit.

You could pull MC cable through the PVC which would put your power in
essentially a metal conduit inside the PVC separating low voltage and
communication lines from the power. ^_^

TDD
I think this is a good idea, but it brings back memories of a fire in a
telephone central office. They had always mixed cables in the rack.
There were large (like your thumb) cables for DC power, MC cables for AC
power and also a lot of multipair telephone type cables. Apparently,
while removing cables from the rack, the MC cable wore the insulation
from one of the DC power cables and caused the fire. Even though the
damage was confined relatively small area, it knocked out communications
in a very large area for a relatively long time. After that, they were
going to segregate the cable types.

Somebody wasn't paying attention when the wire was being removed. There
have been many explosive events when someone decided to yank out wire
from an energized system. I've also worked high voltage underground
power in the 4,160 volt range and even though that's one of the lower
distribution voltages it's still extremely dangerous to the un-careful.
^_^

TDD- Hide quoted text -

- Show quoted text -

It's hard to power down a teleohone office to move cables, so we
always did it live,

I realize that and most folks have no clue as to the DC power and size
of the battery banks and power supplies it takes to run a central
office. I don't have as much experience with switches as I'd like but
the last one I fooled around with was a Dimension 2000 which replaced
what was said to be a more reliable crossbar switch on an island where
the missile test range was where I worked for a while. o_O

TDD