As technology develops, standards are revised or superseded to take into account advancements and precautions needed to minimise risk within tolerable levels. Erstwhile IS 2309 was superseded by IS/IEC 62305 — a comprehensive standard so that not only structures and people are protected but also the electronics inside the structure. Because of this change, NBC — National Building Code & CEA — Central Electricity Authority regulations were also revised to adopt the recommendations given in IS/IEC 62305.

Risk analysis of the building that needs protection is a specialised activity that must be carried out by experts so that customers have their investment well protected. Hence, it is mandatory to conduct an audit, collect data for risk assessment, and implement the recommendations of risk assessment so that people, structure, and all electronics inside the structure are well protected within the tolerable levels.

Methodology of LPS Adequacy Study

Ascertain whether a lightning protection system is provided for all the structures in the facility and, if so, to which Indian/international standard they conform
If they conform to IS 2309 or NFC 17-102, they are invalid as highlighted in NBC 2016 — risk analysis must be done as per IS/IEC 62305 and recommendations implemented
Whether protection measures are needed and to what extent should be determined by the Risk Assessment (IS/IEC 62305-2)