In small ships the supply of power is distributed from one or more centralised switchboards, but in large ships it is distributed from a ring-main system, which consists of heavy armoured cables which are led around inside the armoured part of the ship in the form of a ring and fed through special switchgear by all the generators .
Kwinqanawa ezincinci ukunikezelwa kwamandla ombane kudluliselwa ukusuka kwisikhululo sombane esinye okanye ezininzi, kodwa kwinqanawa ezinkulu la mandla ombane adluliselwa ukusuka kweyona nkqubo ingundoqo yesikhululo, esenziwa ziikheyibhuli zezixhobo zokulwa ezinzima ezilapha ngaphakathi kule nxalenye yezixhobo zokulwa ezimile okwesangqa ezondla igiyeri yazo zonke iijanareyita zesikhululo sokulayita nokucima.