Ngwongwo na-egbochi mmiri, ngwaahịa ọhụrụ - eriri eriri mmiri na-agbapụta mmiri - na-egbochi yarn eji egbochi mmiri nke ụdị eriri anya ụdị akọrọ ọhụrụ, nke Ụlọ ọrụ na-emepụta ma mepụta ya dabere na teknụzụ mgbochi mmiri ọhụrụ na ngwa anya na mmepụta eriri eletrik n'ụlọ na ná mba ọzọ. Ọ na-ji uru dị ka ngwa ngwa mmiri absorption ọsọ, elu mgbasa ruru, ike erughị ala nrụgide, ọ dịghị acid na isi, ọ dịghị dakọtara mmetụta exerted na cables, thermo kwụsie ike, chemical kwụsie ike na-abụghị corrosiveness wdg Na n'ichepụta usoro nke ngwa anya cables, Enwere ike ịhapụ njuputa ihe dị ka jelii USB, teepu mgbochi mmiri na eriri eriri wdg.