home network design 2

[cachua]

Hi there,

I'm going to design a basic LAN for my home. Our family is doing business at home therefore there will be a big room dedicated for employees such as secretary, accountants etc..Each will have a PC. Also, there will be phone line and TV cable. All of the cables will run through brick wall.
I really don't know how to design this situation because they will somehow interfere each other won't they? (for instance electricity lines can affect the phone line, cable lines and so on)

Is there any suggestion to protect unwanted interference (electromagnetic etc..) to each type of cable ?

Thanks a lot for your help

 

[mikeydidit]

The main source of EMI would be the electric. Keep your other cables about 1 foot away from a major power supply, floresent lighting, that sort of thing. I dont thing you will have any problems with the telephone, coax, network cables bleeding over to each other unless you wrap them to tight using tiewraps. Just stay away from the main feeds (transformers and ballist) and you will be OK.

Mike Jones
Louisiana State University Health Sciences center

 

[cachua]

So it is for sure that the eletric lines have to be separated from other lines. But i can't wrap all other lines together like network cable, TV cable, phone lines and they have to be separated as well , don't they?

I think separating out these kinds of wires can cause me a lot troubles since i have to run these lines through a brick wall. If i wrap them all in one, it makes the work easier. If i use the Shield Twisted Pairs cables, do they help to prevent electromagnetic influence from other wires?
Or is there any better way to handle this problem?

I'm just kinda vague about these stuff since i'm afraid they will affect to each other later on and I just want to lower the cost as much as i could

Thaks a lot

 

[franklin97355]

http://www.eurescom.de/~public-seminars/1998/ANCIT/32Azzini/sld001.htm

 

[skip555]

might be worth your while to hire someone and get it done right to start with

 

[crooter]

You mentioned electrical concerning EMI, but in a large room that you may put several employees with several computers and printer--you may want an electrician to look at your load. Probably your fine--but you may be sharing the circuit that you use for your washer and dryer. Just a thought.

Regards

 

[exverizon]

Wrapping CAT 5 & coax together isn't going to cause problems: "cable wrap" is sold for structured wiring that consists of CAT5, coax and fiber tightly bound together. EMI comes from electric lines getting too near telephone (in parallel runs) for a distance. You won't need shielded cable (STP), just regular CAT 5E (UTP). Be careful pulling your drops through the brick wall--you want to avoid damaging the sheath, but don't fret EMI.

 

[StumblingForward]

I work at a hospital that was built in the early 50s, I have the lovely responsibility of doing the maintenance on the building and running and setting up all the networking cabling in house. I have had to make runs through chase pipes in 2 foot brick and concrete fire suppression walls that have coax and power cabling run through them also, I have run cat5 alongside power and OVER florescent lights, (I know I know that’s bad but sometimes you have to do it) and power transformers that are in the ceiling and all other manner of cabling and I haven’t had any problems with EMI (knock on wood), if you are not running these cables all together at any significant distance you shouldn’t have any problem, as far as power for everything, all of the network equipment in the facility runs off of 3 separate 20Amp circuits, a computer doesn’t pull that much power at all, your coffee maker problem uses more to make you a pot of coffee, so I wouldn’t worry to much about power as long as you are just using computers and printers in the room, now if you putting in 3 minifrige's and a pinball machine or something crazy like that then you might want to think about power.

 

[Dante808]

Rule #1. You should never run Cat5 parralel to power lines.

You can cross them safely at a 90 degree angle but you should avoid that as well. IMO 3 feet is a minnimum safe distance, but in reality I"ve done it at about 10 inches with no detectable problems.

If you do run parralell to power lines depending on how bad the interference and the condition of your cables you'll most likely never notice the problems if all your using the line for is broadband internet. The data correction in the hardware itself will most likely render all the collisions you get unnoticeable. However when transferring large files, or using a network intensive app, you will notice, and it'll probably be at a time so far in the future you'll forget where the problem is and never fix it.

So if you want a fast network that lasts, don't break this rule. Ever.