I agree with ActionDave, of course. The voltage drop depends on load: current and power factor [cosfi].
VD=R*I*cosFi+X*I*sinFi the voltage drop from the supply voltage-live to neutral-and the cable end live-to-neutral. For three-phase system, if the referred voltage it is live-to-live then you have to multiply by sqrt(3).
As an example let's say cosFi=0.8 and sinFi=0.6 ?according to NEC 2014 ch.9 Table 9 R=0.16 ohm/1000 ft. [a.c.60 Hz 75oC aluminum]
And XL=0.043 ohm/1000 ft. and considered I=150 A VD=4.2 V [live to neutral].
In order to check the level [NEC recommends a total drop of 5%] you need to know the rated voltage also.
For 480 V [277 V live-to-neutral] 4.2 V will be 1.5%.