The necessity to provide the earth-free equipotential bounding protective measure for an isolating transformer with single secondary winding supplying more than one current using equipment was given emphasis to, and the simplified method to provide this measure was proposed.

Grounding design of factory building based on equipotential bonding;

Discussion about protective effect of equipotential bonding on low voltage distribution system;

Discussion on the Problems about Equipotential Bondingin Buildings;

Analysis on the questions existed in equal potential connection of civil buildings;

Local equal potential connection in residential electrical design;

This paper probes into the problem of the electric design and safety in the toilet including the arrangement of the electrical electric installations, sockets, switches and lines, the creepage protection, and the equipotential connection, etc.

Instancing the electrical engineering construction of Xiamen International Commercial City,this Papar a nalyses the function of the TN-S system of equipotential connection,elaborates the requirement and method of the equipotential connection during the whole process of the construction.

The four kinds of lightning protection measures for the signals in the system,the three levels of lightning protection for the electric source and the design scheme of equipotential earth system were introduc.