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Direct burial ethernet cable recommendation

I want to direct bury an ethernet cable 300 feet from one building to another.  What cable is recommended along with any other hardware like repeaters, lightning arrestors, etc. (brand and specs)?
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SpringLake
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SpringLake
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1 Solution
 
tomerleiCommented:
Hi,
The best way to do this is to use fibre optic cables and two ethernet converters, this way you won't need any lightning protectors, repeaters on noise sheilds.
I would recommend you to use lanshack:
Those are UTP to Fibre Optic converters:
http://www.lanshack.com/UTP-to-Multimode-Fiber-Media-Converters-C87.aspx
And optic cables:
http://www.lanshack.com/ST-to-ST-Multimode-Duplex-Fiber-Optic-Patch-Cable-C18.aspx
this solution is a bit more expensive, but its the most optimal.

If you still want to use a CAT5 cable i would recommend you to buy a sheilded cable since it is going outdoors, if its buried well you wont need any lightning protection and since it only 100 meters i will probably not need any signal repeaters.
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tomerleiCommented:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I agree completely - go fiber.  The first lightning strike that isn't handled well by the equipment will EASILY pay for the fiber costs in terms of replacement costs.
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dlonganCommented:
No doubt fiber is best, but you can use cooper, I would recommend the following:

http://www.tessco.com/products/displayProductInfo.do?sku=423315&eventPage=1

It's a cat5e rated cable but the diff is it's "flooded" so moisture can not penetrate.  Most direct burial communication cables (telco and cable companies) us this type.  Also I would NOT recommend a shielded cable, this will only cause a bigger issue with grounding and lightning.

Your also quite close to the max distance allowed for UTP .  The spec is 100 meters, 300 feet is 91.4 meters.

For lightning protection check these out:

http://www.hyperlinktech.com/web/data_line_lightning_protectors.php
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Excellent point - even though the spec is 100 meters, you COULD have some degradation even below that.  And if your exterior wall to exterior wall length is 300 feet, then you need to tack on AT LEAST 30 feet for cable runs inside the walls and so forth.  Really, Fiber is a much more appropriate solution for you - it's length limit is measured in Kilometers, not Meters.
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Rob WilliamsCommented:
I agree with the fibre idea, but a note regarding copper. Check with the local electrical code. We have come across municipal codes where you are not allowed to run CAT5 between buildings with out meeting special grounding and bonding requirements. In the end fibre was actually cheaper.
Also regarding shielded cable, I am not exactly sure of the exact technical reasoning, but every device has a potential difference (voltage difference) between chassis ground and real ground. This is usually different in different buildings. If you don't follow the "special grounding and bonding requirements", when the shielded cable automatically gets grounded to the chassis at either end by, means of the shielded RJ-45 connector, it actually induces noise into the cable. If you are at 300' you will likely see quite a bit of signal degradation due to the amount of noise induced over that distance.
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Rob WilliamsCommented:
Thanks SpringLake,
--Rob
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