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| Earthing plays a vital role in all electrical systems. |
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| The main reasons for earthing are : |
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To protect people and livestock |
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To protect equipment |
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To permit the equipment to function correctly |
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To ensure the reliability of electrical services |
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| Characteristics of a good grounding system |
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Good electrical conductivity |
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Conductors capable of withstanding high fault currents |
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Long life - a least 30 years |
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Low ground resistance and impendance |
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Equipotential bonding |
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Good corrosion resistance |
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Electically and mechanically robust and reliable |
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| The Speedwell lighning protection system comprise of these principal components : |
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Air terminal network |
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Down conductors |
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Earth termination network (Grounding) |
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Bonding (to prevent side flashing) |
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Equipotential bonding |
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