In accordance with PUIL 2000 (General Requirements for Electrical Installations 2000), there are several definitions that need to be addressed:
– Earth (Earth) is the mass of the earth conductive electrical potential at any point according to any convention, equal to zero.
– Electrodes Earth (Earth Electrode) is part of conductive or conductive parts group makes direct contact and provide electrical connection with the earth.
– Disorders of the Earth (Earth Fault) is: Failure isolation between conductor and earth or frame.
Disruption caused by the conductor that is connected to the earth or because the insulation resistance to earth becomes smaller than a certain value.
– Isolation (Insulation) are:
Soil type according PUIL 2000, divided into:
1). Marshland,
2). Clay and soil fields,
3). Wet sand,
4). Wet gravel,
5). Sand and gravel dry,
6). Rocky soil.
Earthing earthing equipment is part of the normal equipment at work, no current passed. The purpose earthing equipment is:
a). To limit the voltage between the parts of equipment that does not flow through and between these parts with earth up to a price that is safe (no harm) for all normal operating conditions.
b). To obtain a small impedance / low of the road behind a short circuit to ground. Accidents on personnel, arise when a short circuit to ground occurs. So when a short circuit to ground it dipaksanakan flowing through high impedance ground, will cause a large potential difference and dangerous. Also the large impedance at the connections on the grounding circuit can cause electrical arc and heating sufficient magnitude ignite flammable materials.