 9- Waa in wershadaha korontada ,qalabkooda korontada sida xadhkaha, voltage ,qulqulka korontadacurrent,intaba la hubiyaa in aaney khatar ku ahayn nolosha nooloaha,qalabka iyo hantida kaleba waana in dawladu u sameysaa hayad kula xisaabtanta kormeerta sharcigana ku ilaalisa arimaasi oo dhan. 