FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK
42
c) Disconnection supply
A protective device shall automatically disconnect the supply the part the installation
protected that device, that, following fault that part, dangerous touch voltage cannot
be maintained any point the installation.),
- metallic parts building structure.
Figure 5.2.7
TT system
.
5.2.2.3 Main equipotential bonding
According the international standards main equipotential bonding conductor shall
interconnect the entrance point the supplies each building the following conductive
parts:
- main protective conductor,
- main earthing conductor main earthing terminal,
- PEN conductor,
- metal pipework (water pipes, gas pipes, central heating etc
