AWG size is selected by 'Frequency Band' as following data and No. of strands are decided by current amount.
|Frequency||Recommended Wire Gauge||(mm)|
|60Hz to 1KHz||28AWG||0.32|
|1KHz to 10KHz||30AWG||0.25|
|10KHz to 20KHz||33AWG||0.18|
|20KHz to 50KHz||36AWG||0.12|
|50KHz to 100KHz||38AWG||0.10|
|100KHz to 200KHz||40AWG||0.08|
|200KHz to 350KHz||42AWG||0.06|
|350KHz to 850KHz||44AWG||0.05|
|850KHz to 1.4MHz||46AWG||0.04|
|1.4MHz to 2.8MHz||48AWG||0.03|
# Remarks : AWG size is related with Skin effect & Proximity effect which means how much current could flow in the litz wire without resistance and how much effectiveness could influence the induction effect.