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Equipotential earthing – commonly referred to as bonding – is a very important measure in reducing the risk of equipment damage and personal injury. Bonding involves joining together all metalwork and conductive items that are or may be earthed so that it is at the same potential (voltage) everywhere.  At the end of this module you will be able to:

• Understand and identify the hazards associated with earthing that can exist on substation
• equipment and overhead lines and why it is necessary to create an equipotential zone  Correctly apply portable earthing gear in such a way to create an equipotential zone within
• which work can be safely carried out.  Identify possible touch and step potential risks at the worksite and to take the necessary
• corrective action to either eliminate or minimize such risks.