Cable resistance and loop impedance tables

[ProMbrooke]

Anyone have a list of resistance values per foot or meter for 1.5, 2.5 4mm2 ect for twin and earth, cable in conduit and swa cable? 

Also how to obtain Ze when the supply transformer is customer owned, impedance known and assumed to be fed by an infinite MV source. 

 

[Phoenix]

Resistance values can be found in GN3

I think if you google Zpu transformer impedance iet forum, or some similar combination, you might find an answer to your second query

 

[ProMbrooke]

Is GN3 is BS7671? Or do you have a link?

 

[Sidney]

Here's a spreadsheet I use for copper cables:

View attachment R1R2 Calculator.xlsx

 

[kerching]

Is GN3 is BS7671? Or do you have a link?

GN3 is a totally separate publication....it's a guidance note(s) to be bought at phenomenal expense read in conjunction with the Regas along with all the other GNs

 

[Sidewinder]

Cable resistance is given in the IET OSG.

Transformer impedance is available from the transformer oem.

Or you can calculate from the transformer name plate data.

 

[ProMbrooke]

Thank you for the spread sheet!