1. Hunhu hwakakwana: kushandisa zvigadzirwa zvemumba nekunze, kugona kwakakwana, kushomeka kwemukati, uye yakagadzikana magetsi.
2. Kushanda kwakagadzikana: hupenyu hurefu hwekutenderera, huwandu hwesimba guru, yakafara tembiricha yekushanda, yakagadzikana yekuburitsa voltage.