Ngwa
1. Usoro mkpuchi dị mma ma dị irè maka obere ndị na-agbaji sekit, nke a na-ejikarị na Europe na Asia.
2. Echichi nke obere sekit breaker achọghị ngwá ọrụ na-enwe ike mechaa ngwa ngwa na nanị otu bọtịnụ.
3. Mkpọchi lever na-eji mkpịsị aka mkpịsị aka maka ntinye ngwa ngwa: otu-pole na multi-pole circuit breakers dị.
4. A na-atụ aro ka iji ya na mkpuchi nchekwa nchekwa kacha mma ma ọ bụ ihe mkpuchi ndị ọzọ. Enwere ike iji ihe mkpuchi nwere dayameta mkpọchi nke 7mm.
Otu esi eji: A na-atụ aro ka iji ya na mkpọchi mee ka nchekwa dịkwuo elu. Enwere ike iji bọtịnụ tinye ya ngwa ngwa. Mkpọchi ahụ nwere ike ijide ihe mkpuchi nwere dayameta ruru 6mm. Dakọtara ọtụtụ ụdị sekit sekit Europe na Eshia.
Enwere ike ịkpọchi mkpọchi MCB na-ejighị ngwaọrụ. Enwere ike mechaa mkpọchi ahụ site na ịpị bọtịnụ aka, a ga-etinye mkpọchi lever ngwa ngwa site na iji mkpịsị aka gị tụgharịa wiilị.
A na-atụ aro ka iji obere mkpuchi nchekwa mkpuchi na mkpado nchekwa iji nweta ikewapụ ike, mkpọchi akụrụngwa ma gbochie mmejọ.
Mkpọchi na tagout bụ iji gbochie ndị ọrụ ị nweta ihe egwu sitere na mmalite mberede, mmalite na-adịghị mma, na mwepụta ike nke igwe n'oge mmezi na akụrụngwa, iji chebe nchekwa nke ndị ọrụ.