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Author Topic: Network Cables effected by Electrical Cable?  (Read 1617 times)

Network Cables effected by Electrical Cable?
on: January 07, 2009, 20:55:06 PM
When the old cowbows who use to work where I do now installed all the newtwork/electrical cables they zip-tied everything to a Gas Pipe which runs the length of the corridoor.

Now, it hasnt ever been an issue, but now we have a new phone system which is connected to the network. Some of the phones didnt work at first, so we got the guys back in who installed them, and they said the the network cables being tied to the electrical cables is stopping this........It was my job to re-route the electical cables, but then went on holiday so it never got done.

The phones are working fine now, but one of the directors (finance) who organised the new phone system heard about the electical/network cables being togther causing the problem. So my manager today reminded me that I still need to do the work.

Ill be honest, I really CBA doing it. Will the electical cables really effect the network cables, or was it an initial excuse of the guys who installed the phones? Is there any internet evidence that the emf from the electrical cables wont effect the network cables?


Cheers
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Re:Network Cables effected by Electrical Cable?
Reply #1 on: January 07, 2009, 21:59:52 PM
Ive always been taught not to run low voltage/data cables with mains voltage cables, depends what loads and type of loads are running off the mains cables though really.
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  • Offline Pete

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Re:Network Cables effected by Electrical Cable?
Reply #2 on: January 07, 2009, 22:06:08 PM
Get a cat5 tester.. they should be fine running alongside mains cables.
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Re:Network Cables effected by Electrical Cable?
Reply #3 on: January 07, 2009, 22:27:57 PM
cables generally are effected, but the reason for having twisted pairs in network cables is to counter the interference from electric cable and other things.

One thing to bear in mind is if the cable is incorrectly wired then the twisted pair wont work as intended, the correct pairs have to be wired to the correct pins, a cable tester should show you this, the basic ones will flash the 4 LEDs in order.

TBH if it aint broke dont fix it though and they probably just were blaming it on the cable, but dont lay any new cables near the mains cables if you can help it.

But on the same note, I have network cables of about 25m with lengths of mains running alongside in places with no problems at all, but obviously the longer the network cable the more likely you are to have problems.
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  • Offline Serious

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Re:Network Cables effected by Electrical Cable?
Reply #4 on: January 07, 2009, 22:50:27 PM
If it works - DONT FIX IT!!!!!
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  • Offline Quixoticish

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Re:Network Cables effected by Electrical Cable?
Reply #5 on: January 07, 2009, 22:51:31 PM
Quote from: Serious
If it aint broke fix it till it is!


Corrected.  :mutley:
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Re:Network Cables effected by Electrical Cable?
Reply #6 on: January 07, 2009, 23:20:43 PM
Yeah, I dont want to fix it, but my manager is a dumbass, and its going to take a while to do.  :gag:
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  • Offline Beaker

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Re:Network Cables effected by Electrical Cable?
Reply #7 on: January 07, 2009, 23:49:24 PM
Ive seen twisted pair cables reading 110v before now.  They werent actually taking that amount of power, but the dipsh*t 3rd-party electricians had used the cable tray I had fitted to run 3-phase cables down, for about 50m.  They where effecting the cable quite badly.  Ended up with the sparks coming back and being forced to put their own cable tray in.  What they didnt understand about green tape with "No mains power" wrapped around the tray Ill never work out.  
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Re:Network Cables effected by Electrical Cable?
Reply #8 on: January 08, 2009, 00:08:47 AM
hehe, sounds about right!!

Looks like Ill probably have to do the job to be honest, as in theory it will be effecting the network cables.....  :rage:
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  • Offline neXus

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Re:Network Cables effected by Electrical Cable?
Reply #9 on: January 08, 2009, 00:19:16 AM
Quote from: sdp
Get a cat5 tester.. they should be fine running alongside mains cables.

You would think that but things get better if you keep them away. Sorted all the cables out at work one day and transfer rates were miles better.
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  • Offline Serious

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Re:Network Cables effected by Electrical Cable?
Reply #10 on: January 08, 2009, 01:53:35 AM
Quote from: Chris H
Quote from: Serious
If it aint broke fix it till it is!


Corrected.  :mutley:


Thanks  :ptu:
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Network Cables effected by Electrical Cable?
Reply #11 on: January 08, 2009, 06:49:06 AM
instead of moving the power cables... why not replace the network cables ?  would probably be easier to do ?  and you could always install better stuff ?  cat6 or whatever its called ? (the shielded stuff)

if the cable runs past any big motors etc (even if theyre on the other side of the wall) they will probably cause more interference than the power cables themselves :-o
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Re:Network Cables effected by Electrical Cable?
Reply #12 on: January 14, 2009, 12:26:35 PM
Cat5 Sheilded Cables should cure it should it not?  

Is that not the difference between STP (Sheilded Twisted Pair) and UTP (Unsheilded Twisted Pair)?

Sheilded to prevent noise and interferance on the cables??????   :yarr:
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Re:Network Cables effected by Electrical Cable?
Reply #13 on: January 14, 2009, 13:50:26 PM
Indeed Mr.C but it will only reduce, not prevent :)

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Re:Network Cables effected by Electrical Cable?
Reply #14 on: January 14, 2009, 14:03:35 PM
Well Ive got the tasks on Saturday of stripping all the electrical cable, and re-routing it all, so it can no way effect it  :gag:
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