Ngokuya ngezidingo zesekethe, khetha indlela yokusonta:
Lapho usonga ikhoyili yokushaja okungenawaya, kuyadingeka ukuthola indlela yokusonta ngokuvumelana nezidingo zesekhethi yedivayisi yokushaja engenantambo, usayizi wekhoyili yokushaja nobukhulu bekhoyili, bese wenza isikhunta esihle.Amakhoyili wokushaja okungenantambo ngokuvamile alimala ukusuka ngaphakathi kuya ngaphandle, ngakho qala ngokuthola usayizi we-diameter yangaphakathi.Bese unquma inani lezingqimba, ubude, kanye nobubanzi bangaphandle bekhoyili ngokuya ngezinto ezifana ne-inductance kanye nokumelana.