Equipment to distribute and condition electric power, namely, harmonic filters used with variable speed drives that drive motors, to reduce harmonic distortion; low pass inductor filters used in high power electrical applications; harmonic distortion testers and magnetic devices, namely, transformers, electrical reactors, electrical inductors, choking coils used in electrical apparatus, electrical filters used to improve the quality of power delivered to electrical load equipment, electrical ballasts, potentiometers in the nature of electrical resistors, electrical coils and electrical surge arrestors