Re: ethernet and AC in same conduit|
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Posted by ps56k on January 2, 2009, 8:47 pm
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seaweedsl wrote: | |||||||||||||||||||||||||||||||||||||
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Posted by David Lesher on January 2, 2009, 9:30 pm
Please log in for more thread options >added the cabling & ethernet groups -
>seaweedsl wrote:
>> I know it's not recommended or allowed by the NEC , but I'm wondering
>> if anybody knows how likely I am to have problems if I run ethernet >> and AC (120 volt) in the same conduit for 20 meters.... None at all if you run the Ethernet over fiber. If not, don't whine if your fire insurance is void... -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 | |||||||||||||||||||||||||||||||||||||
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Posted by ps56k on January 2, 2009, 9:39 pm
Please log in for more thread options ps56k wrote:
> added the cabling & ethernet groups -
> > seaweedsl wrote: >> I know it's not recommended or allowed by the NEC , but I'm wondering
>> if anybody knows how likely I am to have problems if I run ethernet >> and AC (120 volt) in the same conduit for 20 meters.... >> hmmm - we ran the AC in the required conduit and metal boxes to totally contain the AC/fire gremlins. The "low voltage" stuff in the drop/plenum ceiling was a little trickier... Either - it was the more expensive "plenum" cable, hung from the I-beams, or run inside a pipe/conduit just for physical protection and it would exit from the conduit at a patch panel on either end. Same with the low voltage telco/phone wiring.... which you didn't mention. | |||||||||||||||||||||||||||||||||||||
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Posted by Robert Redelmeier on January 2, 2009, 11:43 pm
Please log in for more thread options > added the cabling & ethernet groups -
> seaweedsl wrote: >> I know it's not recommended or allowed by the NEC , but I'm
>> wondering if anybody knows how likely I am to have problems if I >> run ethernet and AC (120 volt) in the same conduit for 20 meters.... What would a "problem" be for you? In theory, ethernet and 60 Hz AC won't interfere with each other, so separation and isolation are irrelevant. Now, if that AC is going to some noisy electrics (arc welders) or to some sensitive equipment, there might be some interference. But you are taking an unapproved risk and depriving others of a layer of protection. Break the insulation, either by a pulling scar or mechanical accident, and they are _much_ closer to a fatality. Do you want other people setting traps for you? Don't set them for them! -- Robert | |||||||||||||||||||||||||||||||||||||
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Posted by glen herrmannsfeldt on January 3, 2009, 3:15 am
Please log in for more thread options > added the cabling & ethernet groups -
> > seaweedsl wrote: >> I know it's not recommended or allowed by the NEC , but I'm wondering
>> if anybody knows how likely I am to have problems if I run ethernet >> and AC (120 volt) in the same conduit for 20 meters.... As far as I know, it will likely work fine. As you say, not allowed by the NEC. Some time ago, I predicted that you could run ethernet with 240VAC common mode on the cable, but I never got around to trying it. (Also not allowed by the NEC.) Use cable ties onto the outside of the conduit. -- glen | |||||||||||||||||||||||||||||||||||||
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> if anybody knows how likely I am to have problems if I run ethernet
> and AC (120 volt) in the same conduit for 20 meters....
>
> thanks,
> Steve