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From what it looks like 140F is the limit for normal PVC or plenum cable. That's not where the cable melts but the temperature above which it no longer meets specs and will certify- if one were to do it. You might find that an outdoor rated CAT5e or CAT6 cable has a bit higher working temperature. PVC has a range, depending on the formulation up to 221 degrees F. However, the more common formulations are only good to 140 degrees F. Teflon as a rating, depending on formulation, of over 220 degrees F. Category cables have specific formulations and thickness for the insulation on the conductors in order for the cable to meet the specifications it was designed to. You can't simply take a data cable and substitute teflon for the insulation and jacket and have it meet the design specs like you could for regular wire. I doubt that you will find a high temperature category data cable, but if you should it would be prohibitively expensive. -Hal
Last edited by hbiss; 11/27/13 12:19 AM.
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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The specifications I gave you are from Belden.
I once had a situation in a power generating plant in the boiler room where ambient temp reached close to 200 degrees F. I contacted General Cable and spoke to an Engineer. He specified a type of cable that had a special FEP type insulation and had a high nickle content in the wire. If I remember, the temperature rating was in the neighborhood of close to 400 degrees F. The cable was about $70 a foot and I needed over 1,000'. The multi-conductor cable was actually a MSHA rated elevator control cable. The company tried to get the cable on their own and came up with the same pricing. Fortunately, they purchased the cable and their people placed the plastic covered rigid conduit. All we had to do was pull the cable and connect it. 100 Pairs on screw terminal blocks....16 gauge cable. It was a nightmare.
Rcaman
Americom, Inc.
Where The Art And Science Of Communications Meet
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I once had a situation in a power generating plant in the boiler room where ambient temp reached close to 200 degrees F. I contacted General Cable and spoke to an Engineer. He specified a type of cable that had a special FEP type insulation and had a high nickle content in the wire. Right. But you won't find CAT5e or CAT6 data cable like that. OTOH fiber should be able to be made with any kind of jacket that you need. If you can find a fiber cable with a suitable working temperature there's your answer. -Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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Fiber would also eliminate the problem with lightning or other type of surges getting between the buildings.
Jeff
Lead Field Engineer, MSCNS
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RIP Moderator-Nisuko-Tie, General
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In my opinion anytime Ethernet leaves a building it should go to fiber
Skip
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Serving SW and West central Fl since 1984
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Seems to me you should use outdoor rated cable as it's meant to take the harsh conditions.
Patrick T. Caezza
Santa Paula, CA 93060
C-7 - Low Voltage System Contractor - Lic# 992448
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Kevin
Centennial Telecom
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