Inkqubo efanayo yokusombulula ingxaki yebhetri ephezulu ye-voltage ukuya kwipakethi yebhetri ye-voltage ngenxa ye-voltage ye-voltage phakathi kweepakethi zebhetri.
Kuba ukuxhathisa okungaphakathi kweseli yebhetri kuphantsi kakhulu, ngoko ke ukutshaja okuphakathi kakhulu, okuphakathi kwengozi.Sithetha 1A, eyi-1A, eyi-15A, 15A, i-15a ichaza ibhetri