2.2.1 Grounding System
(1) All non-current carrying metallic parts of the electrical equipment shall be grounded.
(2) The transformer star points shall terminate at a copper grounding conductor
bar located in the electrical room. The transformer grounding cables shall be
connected from this bar to the done by M&E's contractor. The grounding
cables shall also be connected from this bar to the ground bar of main
switchboard done by the Contractor.
(3) All grounding conductors within power cables shall be terminated at the
switchboard ground bar by means of lugged cable connections.
(4) Before passing through the Zero-phase-sequence current transformer, the
neutral wire shall be grounded only to the grounding busbar of the main
switchboard.
(5) The grounding conductor size of electrical equipment shall be insulated
copper cable specified in table 19.11.1.
(6) The connection of grounding conductor installed underground shall be done
by exothermic welding.
(7) Ground rods shall be copper clad steel, 16 mm x 3 m.
(8) Grounding clamps connector be able to use for ground connection installed
above ground.
(9) Ground resistance of grounding system shall not be grater than 2 ohm.
Table 19.11.1 Minimum Size of Equipment Grounding Conductors for Electrical