Cat5e cable: UTP/FTP/STP?

[eean]

I'm doing a cable run of about 25m. It's going through a corridor that has loads of junk in it already, so won't bother trunking it. What sort of cable should I use?

There is a beefy power cable (1 inch thick) that runs through the corridor already - obviously I'll try and steer it away from this. There are other electrics, in trunking of some sort, but I'll probably need to run along this.

[SYNACK]

Cat6 is reasonably well shielded and allows for 10GoE in future if desired. Of course if there is huge amounts of EMI you would need to avoid the area or use fiber but that is mighty expensive for only a 25m run.

 

Oddly enough in New Zealand all new cable runs must be a minimum of Cat6 thanks to a Ministry of Education directive. This means any cable runs are an easy choice for us in terms of cable type.

[Andrew_C]

Using a screened cable will only help if the panel at at least one end is designed to have a screen connected to it. No use at all otherwise!

 

If your panel does feature an earth point, then it might help if there is significant noise from parallel runs of mains. Remember that a steel-wire-armour cable is fairly effectively screened by its armour.

[plexer]

Why would you not bother trunking it?

 

Ben

[eean]

Why would you not bother trunking it?

Effort, unless someone can tell me a significant advantage. There are loads of pipes all sorts of phone cables in the corridor, plus one or two trunked electrical cables. Noone's going to noitice 2 white 0.5cm wires. Also, as our building is Edwardian, it has a nice curved arch. Beautiful, but almost impossible to trunk around.

The cable length will be 25m but the actual distance is only about 10, because of all the upping and downing involved.

I can't see an earth point on the panel. No point using Cat 6, we're only going to have one computer on one and a low res network camera on the other.

 

So, which one do I use. This is just a bog standard (supposedly) quick job!

[eean]

Remember that a steel-wire-armour cable is fairly effectively screened by its armour.

What is a steel-wire-armour cable? Is this on electrical cable?

 

Just checked our exisitng cables and they are UTP, so am I right to think this is suitable?

 

Is there an advantage (other than cosmetic) for using trunking? There is some network trunking already there with space but this runs right next to the big electrical cable. Is it better to trunk it or put it on the other side of the corridor away from the big cable but next to the trunked normal electrical?

[HodgeHi]

Why do people avoid mains cables?

 

I'm not griping, but more enquiring.

 

I would have thought there would be shed loads of EMI when running PoE or is this different?

[plexer]

It's different because poe is low voltage dc not whacking great voltage ac.

 

Trunking keeps it segregated from whatever else is there plus I would have thought it should be trunked or cable trayed rather than just clipped to the wall.

 

Ben

[HodgeHi]

What changes with the new home mains networking?

Surely you would see ac there with data flowing over it?

[rhyds]

IP over mains works by essentially running wifi-style signals down the mains on different frequencies, there's a lot of messing about needed to avoid interference from the mains signal itself and any other interference that's on the line.

[HodgeHi]

Thank you very much. Questions answered. I now know why EMI still plays a big part in networking environments.

 

Obviously you adhere to the rules to avoid any issues, but it is nice to know why.

[johnja789]

I am using CAT5/CAT5E/UTP/FTP/STP Cable, Available with RJ45 Connector, UL, CE and RoHS Certified.

It has 4 pairs x 24AWG, With or without Rj45 connector, Color: gray, blue, red and black (PE jacket), Packing: 305m pull box, Patch cord: 15, 50cm and 1-feet and UL, CE and RoHS certified.

 

 

Jack John