Litz wire is used to make inductors and transformers, especially for high-frequency applications where the skin effect is more pronounced and the proximity effect can be an even more severe problem. Litz wire is one kind of stranded wire, but, in this case, the reason for its use is not the usual one of avoiding complete wire breakage due to material fatigue.

Litz wire is frequently found in power applications in frequencies ranging between lower tens to higher hundreds kilohertz, namely induction cookers and transmitters of inductive chargers. Multiple parallel twisted strands of enameled wires can be found also in transformers in some switching power supplies.