AC Impedance Lower than AC Resistance 1

[Mbrooke]

What would cause AC impedance to come out actually lower than AC resistance? Is this physically possible? If so how (or why) would science allow this?

https://imgur.com/a/8hlwmZJ

 

[7anoter4]

Effective Z is defined as R cos(θ) + X sin(θ).[ From voltage drop [approximate] formula: DV=length*effective Z ]
Then if X=0.058 ohm/1000ft and R=3.1 for pf=0.85 Zeff=3.1*0.85+0.058*sqrt(1-0.85^2)=2.67 ohm/1000 ft [r and Z are two separate definitions]

 

[Mbrooke]

I get they are separate values, however I've always assumed that if you added resistance and reactance together you get a higher impedance. I can't figure out why reactance would cause AC resistance to fall.

 

[waross]

Can you give us a link to the origin of the table that you posted?
Thanks.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[7anoter4]

NEC 2017 Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors

 

[7anoter4]