Pre-assembled cables are used in distribution circuits and household connections. Pre-assembled cables has one more advantage than bare conductor that they can be installed in wooded areas and some places with small physical space.
Because of being insulated, it provides greater reliability to the power system, avoiding disconnections due to the short circuits caused by contact with trees.
The pre-assembled cables are constructed by twisting 1, 2 or 3 insulated phase cores and a insulated neutral core together.
ABNT NBR 8182
EETT ANDE 03.21.38 - Rev. 3