Xadhkahaan waxaa loo isticmaalaa sahay koronto oo leh nidaamyada Ilaalinta Multiple Earthing (PME), halkaas oo isku-darka Ilaalinta Dhulka (PE) iyo Dhex-dhexaadka (N) - oo loo yaqaan PEN - ay ku xiraan isku-dhafka dhexdhexaad-iyo-dhulka iyo dhulka dhabta ah ee meelo badan. si loo yareeyo khatarta shoogga korontada haddii ay dhacdo in QALINKA jabo.