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Let's discuss the subject of nonlinear loads defined in Article 100 as:

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Nonlinear Load. A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage.

FPN: Electronic equipment, electronic/electric-discharge lighting, adjustable-speed drive systems, and similar equipment may be nonlinear loads.

Discussion on "the major portion of the load" as it relates to this subject when dealing with wye systems.

Joe Tedesco, NEC Consultant