Kuzindikira Cholakwika cha PEN

Mabanja ambiri aku UK ali ndi makina a PME (Protective Multiple Earth), komwe mawaya a nthaka amapita ku malo operekera magetsi olumikizidwa ndi kondakitala yopanda mpweya yomwe imayikidwa pansi pa malo angapo. Makinawa ali ndi kuthekera kwa vuto losowa lotchedwa neutral failure, komwe kulumikizidwa kwa magetsi chifukwa cha kuwonongeka kapena dzimbiri kungapangitse kuti magetsi agwe.
Kuzindikira Zolakwika za PEN: Pa makina a TN-CS opanda nthaka kumapeto kwa wogwiritsa ntchito (monga momwe tawonetsera pamwambapa), pamene mzere wa PEN wopita kunyumba wadulidwa chifukwa cha vuto la mzere ndipo kumapeto kwa mzere wa PEN kuli koyimitsidwa popanda kubwerezabwereza nthaka, ndipo bokosi logawa RCD silikugwira ntchito bwino panthawiyi, mphamvu ya PE yoteteza nthaka ndi yofanana ndi mphamvu ya mzere wa moto L.
Ngati palibe chitetezo ichi, chipolopolo cha EV chomwe chikuchajidwa chidzalipiridwa ndi voltage yofanana ndi chingwe cha moto L.
magetsi. Ngati palibe zipangizo zina kupatula chojambulira cha EV, mphamvu yotulutsira madzi idzapitirira 30mA ndipo munthuyo sadzatha kudzimasula yekha, zomwe ndi zoopsa; ngati pali zipangizo zina, mphamvu yotulutsira madzi imatha kupitirira 100mA mosavuta, zomwe ndi zoopsa kwambiri.