If s = 1 meter, the sinusoidal current required to produce a 50 dB mV/m equivalent electric field (i.e., the FCC limit) at x = 3 meters is 47 mA! If Z0 = 550W, then the maximum power flowing (without violating the FCC limit) on the power line is 1.21 mW or –29 dBm!  This is not much!