Buried Cable (again)

[reicherb]

I know similar threads have been started multiple times, but if I recall they were usually just people that wanted to run CAT5 cable on the side of a building.

I'm going to be digging a trench to bury electrical service to my garage and though while I've got the trench open, I should look at running CAT5 for phone and data and coax for cable TV in a separate piece of conduit from the electrical. The total run is about 75 ft and about 15 ft will be outside.

My question is, is this ok? If the cable is buried and in conduit is it safe from electrical storms and is it ok to run it parallel to 220V 60A electrical in a separate conduit?

Thanks.

 

[Woodie]

I can't comment on the location of the cable, but for interference reasons, the network cable should be kept at least 6" (or ist it 12") away from the power cable.

 

[reicherb]

Any other thoughts? I'm headed to home depot tonight and thought I'd get some cable if I'm save in doing this.

Thanks.

 

[ScottMac]

It's a bad idea ...

blah
blah
blah ...

You need to have entrance protection on both ends of the UTP.

It's not a noise / interference problem, it's a "power leaks from one side to the other in a potentially dangerous manner" problem.

AND (!) since you want to do voice and data, you'll need at least two runs; one for voice (with a voice-style protection system) and one for data (with a data-style protection system).

If your garage has it's own power feed / breaker box, it's more likely to toast you and / or your expensive equipment.

All the previous posts apply. Above ground or below, outdoor copper must be installed properly or you can be hurtin'.

FWIW

Scott

 

[reicherb]

They both share a single power source, but I certianly don't want any problems. Can ypu point me to a piece of equipment that has entrance protection.

Thanks.

 

[ScottMac]

According to the Catalog:

The avaya Cat5 entrance protector is Avaya part # C5P4T-16.

Height: 10.8 cm
Depth: 3.6 cm
Width: 10.8 cm

Protector type: 100% solid state
Clamping Volatage: 16VAC nominal
Maximum response time: 2-5 nanoseconds
Grounding Requirements: 10AWG for primary or 10AWG for isolated Loop Applications
Grounding connection: 8-32 screw to ground plate module

This component is NOT RATED FOR VOICE (!)

Avaya also makes voice-type entrance protection, I'm not near my catalog tofay. If you find a place that has the Data entrance protection, they should also have a similar flavor for voice.

Good Luck

Scott

 

[tboneuls]

if its in conduit it should be okay, but try to seperate the conduits as much as possible, i have heard about interfearence, but i havent experienced this myself

 

[ScottMac]

Interference is not the issue.

Current UTP transceivers and cable technologies are fairly deaf to common mode noise these days (like 60Hz). The really evil stuff is high-frequency impulse noise.

It's still a good idea to avoid it, if possible, but it's much less of an issue that it used to be.

FWIW

Scott

 

[narzy]

super duper uber goober Thread (subscriber) on this exact same topic, has a bunch of great info in it, including where you can get the stuff .

Non-subscriber Link

 

[ecfisher]

I didn't know that Avaya sold stuff like that over the counter, or did I misunderstand your post?

 

[ScottMac]

It should be available from anyone that sells Avaya stuff. I get most of my stuff through Anixter ...

FWIW

Scott