The fundamental reason for inspecting and testing an electrical installation is to determine whether new installation work is safe to be put into service, or an existing installation is safe to remain in service until the next inspection is due.

The inspector carrying out the inspection and testing of any electrical installation must have a sound knowledge and experience relevant to the nature of the installation being inspected and tested, and to the technical standards. The inspector must also be fully versed in the inspection and testing procedures and employ suitable testing equipment during the inspection and testing process.