Fault Managed Power Systems (FMPS), codified under NEC Article 726 and UL 1400 standards, represent a transformative approach to high-power distribution by limiting fault energy rather than total power. This architecture enables delivery of thousands of Watts over long distances while maintaining safety comparable to power-limited circuits like Power over Ethernet (PoE). However, despite these safety mechanisms, FMPS installations are still vulnerable to electrical surges (i.e. lightning-induced) that can compromise system integrity, cause equipment damage, and pose fire and electrocution hazards. 
This presentation will cover: 
-Fundamentals of FMPS: architecture, operation, and safety mechanisms. 
-Surge Phenomena in FMPS: sources, characteristics, and impact. 
-Standards & Compliance: protection, bonding, and grounding requirements per NEC/NESC/UL. 
-Field experience and lessons learned over 10 years of deployments.