Resistance of wires for voltage drop calculations

[NEC User]

For 3 phase - NEC chapter 9 Table 9 should be used for impedance and reactance of wires.
For Direct Current - NEC Chapter 9 Table 8 should be used for resistance of wires.

What table should i use to find impedance for single phase?

 

[G._S._Ohm]

Single phase implies AC, so the impedance values at a specified frequency should be closer to reality than the DC (0 Hz) values.