Gutahura amakosa ya PEN

Imiryango myinshi yo mu Bwongereza ifite sisitemu ya PME (Protective Multiple Earth), aho insinga z'ubutaka zinyura mu gice cy'ingenzi gihujwe n'icyuma gitanga amazi gishyirwa mu butaka ahantu henshi. Izi sisitemu zishobora gutera ikibazo kidasanzwe cyitwa neutral failure, aho guhagarika amazi mu kirere bitewe no kwangirika cyangwa kwangirika bishobora kongera ibyago byo gushoka kw'amashanyarazi.
Gusuzuma amakosa ya PEN: Kuri sisitemu za TN-CS zidafite ubutaka ku mpera y'umukoresha (nk'uko bigaragara haruguru), iyo umurongo wa PEN ugana mu rugo uciwe kubera ikibazo cy'umurongo kandi igice cy'inyuma cy'umurongo wa PEN kiri mu mwanya utarinze gusimburwa burundu, kandi agasanduku k'amashanyarazi ka RCD kadakora neza muri iki gihe, ingufu za PE yo kurinda ubutaka zingana na voltage y'umurongo w'umuriro L.
Iyo idafite ubu burinzi, igisenge cya EV kirimo gusharija kizaba gifite voltage ingana n'umurongo w'umuriro L.
voltage. Iyo nta bindi bikoresho bihari uretse charger ya EV, umuyoboro w'amazi uzarenga 30mA kandi umuntu ntazashobora kwikuramo, ibyo bikaba ari ikibazo cy'umutekano; niba hari n'ibindi bikoresho, umuyoboro w'amazi ushobora kurenga 100mA byoroshye, bikaba ari urupfu runini.