Fiyuusyada nooca "KB, KU, KS" waxay ka tirsan yihiin fiyuusyada nooca "K" iyo "T" sida waafaqsan heerka IEC-282. Waxaa jira saddex nooc: nooca caadiga ah, nooca caalamiga ah iyo nooca dunta lagu dhejiyo. Badeecadani waxay ku habboon tahay fiyuuska heerka danab ee 11-36kV.