Upgrading your switchboard improves overall electrical safety.
A switchboard upgrade is when existing rewireable fuses are replaced with new circuit breakers and residual current devices (RCDs).
RCDs constantly monitor the electric current flowing along a circuit. If someone touches a live wire or faulty appliance, causing the current to flow through their body to the ground, they could receive a severe electric shock or be electrocuted. If an RCD senses any loss of current, where electricity is diverting to the ground rather than through the circuit, it will very quickly shut the electricity off and therefore reduce the chance of serious injury.
Houses built before 1970 are likely to have ceramic rewireable fuse switchboards with rubber and vinyl cabling running throughout ceilings and wall cavities. Unknown to you and your family, these cables are often worn, deteriorated and, therefore, a serious fire risk.