I-voltage ephansi ye-spool porcelain insulatorI-spool insulator ifakwe izambulela ezingaphezu kwezakhiwo ezimbili.I-conductor iboshelwe phakathi kwezakhiwo zesambulela ezingenhla nezingaphansi, futhi isikhungo sinezimbobo.Ixhunywe ngokuqinile engalweni yesiphambano noma i-splint enezinzipho zokulutha.