ethernet lengh

[pepparz]

what would be the maximum lenght that u could run a ethernet cable for a home computer without it causing problems.

 

[gazj82]

As far as I know once you get over one hundred metres you need some sort of hub / repeater.

 

[shanky887614]

As far as I know once you get over one hundred metres you need some sort of hub / repeater.

Extenders will require a local power source as well, I think every 100m or so acording to last one I looked at

 

[MisterE]

The Cat 5E standard is a maximum of 100 mtrs. between devices (computer / switch / hub / router etc.) based on 90 mtrs. of solid core cable and 10 mtrs. of multi-core (i.e. the patch leads at each end).
Plenty of length for the average house.
Take care to avoid tight bends or crushing the cable, keep the data cable separated from power cables and keep the twists in the cable at the terminations in the sockets as much as you can.

 

[UNG]

You can go beyond the 100m maximum I have often installed 140m runs without any noticeable issues when I was installing radio data networks

 

[Rockingit]

It ultimately depends on how fast you're trying to run the data down the cable as longer runs = more crosstalk = longer error checking = slower performance. But in a domestic situation you shouldn't be anywhere NEAR having to worry about this. As said above, just make sure the cable isn't being damaged and is properly terminated and you're good to go.

 

[happydundee]

Extenders will require a local power source as well, I think every 100m or so acording to last one I looked at

If your switch is POE, then you can power an extender via this.
PoE Extender | PowerDsine | Products
I have installed a few PTZ cameras upto 180m away from the switch with these on vessels

 

[Burnt Fingers]

Cat5e, Pure Cu 80m max. Go over that and things will, go weird.

 

[Burnt Fingers]

Had a call to a site where the electrician had run 140m in CCA and nothing came out of the end at all!

 

[happydundee]

Cat5e, Pure Cu 80m max. Go over that and things will, go weird.

That's completely wrong. Cat 5e is ratified to work with a permanent link length of 90m. With a 5m patch lead at either end giving a total link length of 100m. This will give Gb speeds and POE if required. If you have problems within these parameters, then it is either an incorrectly installed link or unratified cable. There is a lot of crap cable with low copper coming in from China with fake certs. Stick with a quality brand, and you will have no problems.

In practice, a link of up to 120m will still work perfectly, but will not pass a TIA or EN permanent link test due to length and propagation delay skew.

HTH

 

[Burnt Fingers]

"but will not pass a TIA or EN permanent link test due to length and propagation delay skew."

..........oh so it does not pass the test. In that case will export an earth to an outbuilding 500m away in 10mm. Z might be high but it work perfectly.

More double standards on this helpful friendly forum.

 

[happydundee]

No need to throw your toys out of the pram, because you were wrong. :chillpill:

Any 90m correctly installed Cat 5e will work perfectly and pass any test it was designed for.

My remark about not passing the test referred to a 120m Link. In certain situations, clients require a longer than allowed copper link, without resorting to fibre. In such cases, as long as the client is aware that it is outwith test parameters, but will work fine for his purpose. There is no safety aspects to installing a longer ethernet link, if that is what the client wants.

 

[Burnt Fingers]

Yea................................

 

[elliot123]

Why keep them twisted as much as possible always untwisted back to where I've stripped?

 

[zap]

Twists alleviate cross-talk but probably wouldn't matter at terminations.