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TT system
.2.),
- metallic parts building structure.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.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.2.
Figure 5.2.
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