The connection parts of electric distribution cable can be damaged by wind and various types of outer loads. So, the reasonable connection system is required to solve these problems. Therefore, this study presents the composition type of self-tensioning connection system for electric distribution cable.

The protective cover system is needed for the safety and bearing capacity of underground cable pipe. This study evaluates the flexural capacity through the experimental study according to the several design variables for the protective covers.

The pipe system for underground cable can be damaged by shock and corrosion under the various types of upper load. The existing protective systems have many problems because of constructivity and maintenance. Therefore, this study presents the protective system for underground cable pipe and evaluates the field application according to upper load.