How often should periodic inspections be conducted on existing installations?

Periodic inspections are essential for ensuring the safety and continued compliance of electrical installations. The recommended frequency for these inspections is defined based on industry standards, which reflect the risk profile and usage of the buildings in question.

The correct answer states that periodic inspections should occur every 5 years for commercial premises and every 10 years for domestic properties. This is in line with the guidelines set out by organizations such as the IET (Institution of Engineering and Technology) and established regulations. Commercial properties often experience higher wear and tear due to more intensive use and a larger number of occupants, justifying the shorter inspection interval. On the other hand, domestic properties typically have a lower risk and do not require as frequent inspections, hence the recommendation for a 10-year interval.

This approach emphasizes a risk-based strategy for inspections, balancing the need for up-to-date safety assessments with practical implications for property owners. Regular inspections help identify any potential hazards and ensure that any installation meets current regulations and standards, thus protecting both the occupants and the users of the electrical system.