ABSTRACT
The correct installation of protective bonding considerably reduces the risk of electric shock within an electrical system. Protective bonding prevents an imbalance of pressure by joining all metal parts that could become live during a fault. The correct installation of protective bonding will ensure that there will be no difference in potential between any exposed conductive parts and extraneous conductive parts within the installation as it creates an equi-potential zone. There are two types of protective bonding, main protective bonding and protective supplementary bonding. Main protective bonding is used to join all extraneous conductive parts within a building, such as the water and gas installation to the main earthing terminal. Protective supplementary bonding is used to connect all exposed and extraneous conductive parts within an area such as the bathroom. The conductor used for all types of bonding must be identified by using green and yellow coloured cables just as electricians would for earthing conductors.
