Calculating the inductance per metre from the Cable 'L/R ratio'.

[sh-eda]

Hi

I wonder if someone could answer this question. It's probably quite simple but I just want to check.
I am working on send some AC communication signals down long cables.
One particular type of cable has a parameters that specifies an 'L/R ratio' (60 uH/ohms) instead of giving a inductance/meter spec.

Can I assume to work out the inductance/metres I just multiply this with the cable resistance / metre

So for a resistance of 0.00741ohms/m
The inductance should be 444nH/metres?

I have some other cable specs that specified both the L/R ratio, resistance /m and the inductance/m and it did not work out correctly. I noticed it worked out as being the cable inductive impedance at 1KHz instead.
Thanks

 

[FvM]

L/R is a limit value according to intrinsic safety regulations and most likely not suited as an accurate specification of actual cable inductance.

 

[sh-eda]

OK, Thanks for answering.
Yes the cable I am looking at is intrinsic safety cable so that makes sense.
I actually calculated the inductance based on the cable physical properties, and it work out did actually work out close to 444nH/m which is what I calculated above.
After some searching I did found some more information about it
**broken link removed**
**broken link removed**
Thanks