Table 6. necessary because protective conductors have safety
function.1.1
Cross-sectional area phase conductors of
the installations
S (mm2
)
Minimum cross-sectional area the
corresponding protective conductor (PE)
Sp (mm2
)
S S
16 16
35 S/2
The values Table 6.3.3. the application this table produces non-standard sizes,
conductors having the nearest standard cross-sectional area are used. This conductor called protective
conductor and identified letters PE.
Protective conductors well the terminals connecting them shall sufficient cross-
sectional area for conducting fault currents, usually short circuit currents, caused failure of
installation and consequently short connection between live parts and exposed conductive
parts the point failure.
The cross-sectional area the protective conductor shall not less than the appropriate
value shown Table 6. this not so, the cross-sectional area the protective
conductor determined manner which produces conductance equivalent that
which results from the application Table 6.1.
The cross-sectional area every protective conductor, which does not form part the
supply cable cable enclosure, shall be, any case, not less than:
− 2,5 mm2 mechanical protection provided,
.CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT 59
locating devices. These rules follow from the purpose protective
connection provided them.1 are valid only the protective conductor made the same
material the phase conductors. means that the safety depends electrical installation more less protective
conductors.3. The terminals for protective conductors shall much more reliable
than terminals for other conductors.
6. Protective conductors well terminals for
protective conductors shall fulfill certain rules.3. Proper installation protective conductor
It follows from the principles mentioned above that almost every electrical installation the
conductor for mutual connection exposed conductive parts, extraneous parts, and earth,
besides the live (phase) conductors, shall installed.3. case conductive floor around the high voltage device, the floor shall be
connected with the exposed conductive parts the device
