2
\$\begingroup\$

I am trying to find out what the requirements are on dielectric strength and isolation between the conductors in a Gigabit Ethernet transmission line.

A first place to look would of course be the TIA-568 standard, but I can't afford to buy it.

Second place to look would be in a manufacturers datasheet for a Cat5e cable like this one, which specifies the following:

Dielectric strength conductor-conductor and conductor-screen (2 seconds) : 2.5 kV DC

That's what I'm looking for, but the problem with this is that the manufacturer might have taken some headroom over the minimum value allowed by any possible standard. So that's a dead end, as I see it.

Are there requirements on this property in any standard? If so, which one and where to find it?

Thanks in advance!

\$\endgroup\$
  • \$\begingroup\$ You should be able to deduce them from the used voltages \$\endgroup\$ – PlasmaHH Feb 29 '16 at 15:12
  • \$\begingroup\$ @PlasmaHH Those voltage levels are known, but I'm looking for any possible universal requirement regulated by some standard. \$\endgroup\$ – Niklas Feb 29 '16 at 15:14
  • \$\begingroup\$ What is the insulation rating on the cables between conductors? Compare and cross refer this with the breakdown voltages specified for the magnetics. \$\endgroup\$ – Andy aka Feb 29 '16 at 17:56
  • 1
    \$\begingroup\$ @Andyaka That is a good start, but I haven't been able to find that either. Is it in the TIA-568 standard perhaps? I can't afford to buy the standard though... \$\endgroup\$ – Niklas Mar 1 '16 at 9:57
  • \$\begingroup\$ Go look at manufacturer's data sheets to get the values. \$\endgroup\$ – Andy aka Mar 1 '16 at 10:06
0
\$\begingroup\$

Since the leads are connected to each other at the termination there is no requirement on dielectric strength between the conductors, only between the shield and the 8 leads of the cable.

| improve this answer | |
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.