Large electrical systems are extremely complex in structure. They tend to be energy inefficient, emit non-ionizing (ELF) radiation, and pose a safety hazard.
Designing these electrical systems requires extensive knowledge and experience, as well as meticulous observation of numerous laws and regulations. Design is often fraught with errors, which remain hidden while causing hazards of radiation, electrocution, etc.
These issues should be addressed by conducting periodic system testing, but performing these in the appropriate resolutions poses a challenge even to the most skilled of engineers.
Electrical work and maintenance, including various modifications to the system, are carried out from time to time by professionals of varying proficiency, and are not always thoroughly tested afterwards.
In many cases, these actions result in errors across the system, which pose hazards such as radiation, electrocution, and more.