Question 9 - The NBR 5410:2005 standard defines a standard
classification nomenclature for grounding schemes in low voltage
electrical installations. This nomenclature defines, through two
main letters and an auxiliary letter (in some cases only), the way
in which the power supply and the installation's masses will be
grounded. For the TN-S grounding scheme, answer:
a) What is the situation of the power supply and masses in relation
to grounding?
b) Draw the schematic of this schematic showing how the grounding
of the power supply and the masses is done, as well as the function
of the neutral and protection conductors.
c) What can be said about the use of DR for this connection scheme?
Justify your answer.