Bonding is used to reduce the risk of electric shocks.
Answered by Rupert, Electrical Safety Expert
Bonding is used to reduce the risk of electric shocks to anyone who may touch two separate metal parts when there is a fault somewhere in the supply of electrical installation. By connecting bonding conductors between particular parts, it reduces the voltage there might have been.
The types of bonding generally used are main bonding and supplementary bonding.An electrician will give you advice if your earthing or bonding needs to be improved for safety reasons.
We strongly recommend that you use an electrician registered with a government approved scheme to carry out any electrical installation work you need doing.