CAT-5 Lightning/Surge Protection?
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Posted by Tom B on March 6, 2005, 12:38 am
Please log in for more thread options Looking for a product and recommendation for lightning/surge protection on standard CAT-5 cabling between buildings. The only two products I know of are - http://www.tripplite.com/products/product.cfm?productID=151 and http://www.itwlinx.com/home/default.asp The first, I believe, is available from Amazon for around $18.00. Does anyone out there have a good recommendation and/or experience in this area? I live an a very rural area and really need an on-line source to purchase from. Thanks for any help - | ||||||||||||||||||||||
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Posted by James T. White on March 6, 2005, 3:53 am
Please log in for more thread options Tom, A couple of years ago, I had a couple of 8-port 10/100 3Com Ethernet switches at opposite ends of my house, a 3Com ISDN Modem/Router (gateway to my ISP) and two Ethernet cards get damaged by a nearby lightning strike. When I got everything repaired/replaced, I installed a Triplite DSUT1CSU between the ISDN Modem/Router and the telco plus a DNET1 and DTEL2 between the equipment at the ends of the house and the CAT5 cable that connects them. I suspect that the initial failure was caused by a surge coming in from the telco on the ISDN line and finding a ground path through the ISDN Modem/Router, the Ethernet switches and the Ethernet cards in the systems to the ground in the PC power supplies but wasn't able prove it. Another possible, though less likely, cause would have been a very, very close lightning strike causing a significant potential difference between the two ends of my house. While I haven't had any more failures since installing the Triplite protectors and I feel better protected, it doesn't really prove anything. As far as your situation with separate buildings, I would use fiber optic cable between the buildings which would be a much better solution since glass fiber won't conduct electricity at all. Depending on the length you need, you might be able to find a multi-mode duplex fiber cable with the connectors already on the ends and a pair of fiber to Ethernet converters for a lot less than you might expect. Search the web and eBay for "fiber optic jumper" and "fiber Ethernet converter". By getting a fiber with the connectors already on the ends, you eliminate the biggest hassle and cost with fiber, i.e. hiring someone with the special tools to put the ends on the fiber. -- James T. White | ||||||||||||||||||||||
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Posted by James Knott on March 6, 2005, 12:16 pm
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James T. White wrote: > As far as your situation with separate buildings, I would use fiber optic
> cable between the buildings which would be a much better solution since > glass fiber won't conduct electricity at all. Several years ago, while touring Corning Glass, in Corning New York, I saw a demonstration of glass that was able to conduct significant amounts of power. The display included a common household light bulb, that received it's power through the glass. | ||||||||||||||||||||||
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Posted by James Knott on March 6, 2005, 12:12 pm
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Tom B wrote: > Looking for a product and recommendation for lightning/surge
> protection on standard CAT-5 cabling between buildings. These days, you might want to consider fibre. While it's certainly possible to make a safe installation with copper, it's far easier with fibre. as there's no concern about lightning, power induction etc. | ||||||||||||||||||||||
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> protection on standard CAT-5 cabling between buildings. The only two
> products I know of are -
>
> http://www.tripplite.com/products/product.cfm?productID=151
>
> and
>
> http://www.itwlinx.com/home/default.asp
>
> The first, I believe, is available from Amazon for around $18.00. Does
> anyone out there have a good recommendation and/or experience in this
> area? I live an a very rural area and really need an on-line source to
> purchase from.
>
> Thanks for any help -