I have some long runs for PWM 3con 14 for brushless dc motors 24DC typically 2-4 Amps max. I never use shielded cable on motors but in this case the runs are 80-150’ and running nears lots of data lines. I can prevent a lot of parallel tight proximity but there are lots of intersections. Does shielding to Gnd one end at the driver have any effect on the signals? With only a DSS scope and volt meter on hand is there any test to see the reduction of noise coming off the cables using shielding? How about put a scope on some cat 5 pairs near the motor lines at varying proximities to see the effect of crosstalk? I don’t even know if any visible noise from an unshielded cable indicates that shielding is warranted. Any advice welcome.