Análise da evolução normativa para sistemas de proteção contra descargas atmosféricas: comparativo entre a NBR 5419:2008 e NBR 5419:2015 e a importância do gerenciamento de riscos nos projetos pós-atualização

Abstract

This study investigates the normative evolution of the Lightning Protection Systems (LPS) in Brazil, comparing the 2008 and 2015 versions of NBR 5419, with a focus on risk management in post-update projects. The objective was to identify the main technical changes and their impact on professional practice. A qualitative approach was employed, including a literature review of ABNT and IEC standards, document analysis of the four parts of NBR 5419:2015, and a case study of an LPS project implemented in 2014 for an industrial warehouse in Curitiba, Paraná. The comparison revealed that the 2015 version introduced mandatory quantitative risk analysis (Part 2), harmonization with IEC 62305, formalized inspection and maintenance plans, and integration between external and internal protection (Parts 3 and 4), which were either absent or optional in the 2008 standard. Through an Excel spreadsheet, risk components for life, property, and service continuity were calculated, demonstrating that despite gaps in the original project, the total risk remained below the acceptable level, validating the quantitative method and suggesting specific improvements.