The meaning of the word ‘ protection ’ as used in the electrical industry is no different from that in everyday usage. People protect themselves against personal or financial loss by means of insurance and from injury or discomfort by the use of the correct protective clothing. They further protect their property by the installation of security measures such as locks and/or alarm systems. In the same way, electrical systems need the following :
1. To be protected against mechanical damage, the effects of the environment and electrical overcurrents.