Kutayikira kwa nthaka ndi mphamvu yamagetsi yomwe imafika pansi kudzera munjira yosayembekezereka. Pali magulu awiri: kutayikira kwa nthaka kosayembekezereka komwe kumachitika chifukwa cha kusungunuka kwa zinthu kapena kulephera kwa zida ndi kutayikira kwa nthaka komwe kumachitika chifukwa cha momwe zidazo zinapangidwira. Kutayikira kwa "kapangidwe" kungawoneke kwachilendo, koma nthawi zina kumakhala kosapeweka - mwachitsanzo, zida za IT nthawi zambiri zimapangitsa kuti madzi azitayikira ngakhale zikugwira ntchito bwino.
Kaya kutayikira kwa madzi kwachokera kuti, kuyenera kupewedwa kuti kusayambitse kugwedezeka kwa magetsi. Izi nthawi zambiri zimachitika pogwiritsa ntchito RCD (chipangizo choteteza kutuluka kwa madzi) kapena RCBO (chotsekera chigawo chotayira madzi chokhala ndi chitetezo cha overcurrent). Amayesa mphamvu yamagetsi mu line conductor ndikuyerekeza ndi mphamvu yamagetsi mu neutral conductor. Ngati kusiyanako kupitirira mA rating ya RCD kapena RCBO, idzagwa.
Nthawi zambiri, kutayikira kwa madzi kumagwira ntchito monga momwe amayembekezera, koma nthawi zina RCD kapena RCBO imapitirira kutayikira popanda chifukwa - iyi ndi "ulendo wokhumudwitsa". Njira yabwino yothetsera vutoli ndikugwiritsa ntchito mita yoyezera kutayikira madzi, monga Megger DCM305E. Izi zimamatiridwa mozungulira waya ndi kondakitala yopanda mpweya (koma osati kondakitala yoteteza!), ndipo imayesa mphamvu ya kutayikira kwa madzi pansi.
Kuti mudziwe dera lomwe layambitsa kugwedezeka kolakwika, zimitsani ma MCB onse mu chipangizo chogwiritsa ntchito mphamvu ndikuyika cholumikizira cha kutayikira pansi mozungulira chingwe chamagetsi. Yatsani dera lililonse motsatizana. Ngati likuyambitsa kutayikira kwakukulu, izi zitha kukhala dera lovuta. Gawo lotsatira ndikuzindikira ngati kutayikirako kunali kwadala. Ngati ndi choncho, pakufunika njira ina yofalitsira katundu kapena kulekanitsa dera. Ngati ndi kutayikira kosadala—chifukwa cha kulephera—kulephera kuyenera kupezeka ndikukonzedwa.
Musaiwale kuti vutoli likhoza kukhala RCD kapena RCBO yolakwika. Kuti muwone, chitani mayeso a RCD ramp. Pankhani ya chipangizo cha 30 mA - chomwe chimadziwika kwambiri - chiyenera kugwedezeka pakati pa 24 ndi 28 mA. Ngati chikuyenda ndi mphamvu yotsika, chingafunike kusinthidwa.