Resistance per meter of armour

[mickfred]

I know it's late and the lap dances are still open , so i will wait till tomorrow for any replies . Does anyone have resistance per meter tables for steel armour 90degree thermosetting ,can't find it anywhere . Ta

 

[Wilko]

Early to bed, early to rise makes Sparky healthy, wealthy and wise ... Why did I not listen to my Mum?

Anyway, I don't have one but here's my suggestion ... using the table below first column for Steel mm2 divided by the resistivity of st/cu taken as 8.5 (from GN8 p60) should give the Cu mm2 equivalent. Don't use the table Cu values in the table (it's for CPC and uses k not resistivity). Then convert that to Cu mm2 to resistance using 18.1mOhms/m at 20degC for 1mm2 (OSG Table I1 page 190). But it is early. Hope that helps

View attachment 35918

 

[Pete999]

I know it's late and the lap dances are still open , so i will wait till tomorrow for any replies . Does anyone have resistance per meter tables for steel armour 90degree thermosetting ,can't find it anywhere . Ta

file:///C:/Users/Pete/Desktop/SWA%20CPC.pdf
Is this what you are after? good job some of us "Old scho;; brigade" are on the ball cheeky b-----

 

[Richard Burns]

The attached file is the Draka data for XPLE SWA it gives the armour resistance in ohms per km which is the same as mohms per m. the * is for circular rather than shaped conductors.

 

[Wilko]

The attached file is the Draka data for XPLE SWA it gives the armour resistance in ohms per km which is the same as mohms per m. the * is for circular rather than shaped conductors.

That's the one.
For 10mm* 2core, the Table had max 6 Ohm per km, and my longhand gave 5.92 Ohm. I'm happy it was even close