Ya dace da aiwatar da ma'aunin juriya na rufi (IR), rabo mai ɗaukar ruwa (DAR), index polarization (PI), leakage current (Ix) da capacitance sha (Cx) na kowane nau'in kayan wuta mai ƙarfi, gami da switchgear, masu canza wuta, reactors, capacitors, motors, janareta da igiyoyi, da dai sauransu.