Cat5e - Page 3 - Electrician Talk - Professional Electrical Contractors Forum

EDM · 11-04-2009, 09:31 PM

Quote:

Originally Posted by steelersman

Hey, I'm not a hack. Peter D is the hack.

Peter D is my friend, it even says so in my profile.

steelersman · 11-04-2009, 09:33 PM

Quote:

Originally Posted by EDM

Peter D is my friend, it even says so in my profile.

I feel very sorry for you.

Vintage Sounds · 11-05-2009, 12:36 AM

Quote:

Originally Posted by Magnettica

Btw, can Cat5 also be used as speaker wire?

It's not intended to be used as speaker cable, but there are a lot of people out there who believe Cat 5 makes some of the best speaker cables. They try lots of things like braiding and paralleling to extract the 'best sound'. It's cheaper than high-end speaker cable. Google Cat5 speaker cable and you might be surprised. Maybe it has to do with the skin effect on many small conductors since a speaker cable is carrying AC.

I tried it with my speakers and it worked well but my experimental pair of cables was too short, so I let my friend have them.

jw0445 · 11-05-2009, 09:36 AM

The reason you wire cat 5e according to the color code is that each pair is twisted to a different amount of twists per inch. This enables the data to be transmitted with less errors. BTW standard telephony is A for voice and B for data.

mcclary's electrical · 11-05-2009, 10:28 AM

Quote:

Originally Posted by jw0445

The reason you wire cat 5e according to the color code is that each pair is twisted to a different amount of twists per inch. This enables the data to be transmitted with less errors. BTW standard telephony is A for voice and B for data.

says who?

.....provide documentation

steelersman · 11-05-2009, 10:47 AM

Quote:

Originally Posted by jw0445

The reason you wire cat 5e according to the color code is that each pair is twisted to a different amount of twists per inch.

Horse**** I say. They have same amount of twists per inch. Now maybe that is the difference between the different CAT's but not for different pairs in the same cable.

jw0445 · 11-05-2009, 10:57 AM

Here you go. Enjoy the info.

Category 5e
Cat 5e cable is an enhanced version of Cat 5 that adds specifications for far end crosstalk. It was formally defined in 2001 as the TIA/EIA-568-B standard, which no longer recognizes the original Cat 5 specification. Although 1000BASE-T was designed for use with Cat 5 cable, the tighter specifications associated with Cat 5e cable and connectors make it an excellent choice for use with 1000BASE-T. Despite the stricter performance specifications, Cat 5e cable does not enable longer cable distances for Ethernet networks: cables are still limited to a maximum of 100 m (328 ft) in length (normal practice is to limit fixed ("horizontal") cables to 90 m to allow for up to 5 m of patch cable at each end, this comes to a total of the previous mentioned 100 m maximum). Cat 5e cable performance characteristics and test methods are defined in TIA/EIA-568-B.2-2001.

Individual twist lengths
By altering the length of each twist, crosstalk is reduced, without affecting the impedance.
Pair color[cm] per turnTurns per [m]Green1.5365.2Blue1.5464.8Orange1.7856.2Brown1.9451 .7

8P8C modular plug pin positioning

TIA/EIA-568-B.1-2001 T568A WiringPinPairWireColor131white/green232green321white/orange412blue511white/blue622orange741white/brown842brownTIA/EIA-568-B.1-2001 T568B Wiring[1]PinPairWireColor121white/orange222orange331white/green412blue511white/blue632green741white/brown842brown

EDM · 11-05-2009, 10:58 AM

jw0445, welcome to the forum. Thanks for the info.

jw0445 · 11-05-2009, 11:00 AM

Pair color[cm] per turnTurns per [m]Green1.5365.2Blue1.5464.8Orange1.7856.2Brown1.9451 .7
[12]

steelersman · 11-05-2009, 11:05 AM

Ok. I concede.