Igwe ndọba ụgbọala nke nwere akwa abụọ, nke nwere nkeji iri ise.

E tinyere igwe mbuli ebe a na-adọba ụgbọala okpukpu abụọ na LA. Igwe mbuli ahụ dabara na ọkọlọtọ obodo, yana akụkụ ọkụ eletrik UL.