NFPA 70E's 130.5 incident energy analysis is associated with which concept?

• A. Arc flash incident energy analysis
• B. Ground fault current calculation
• C. Short-circuit path analysis
• D. Insulation coordination

Answer: (A)

This question centers on arc flash incident energy analysis as defined in NFPA 70E. The 130.5 provision governs estimating the incident energy that could be released at a given task location, so you can determine the arc flash boundary and choose the appropriate PPE. That energy figure is specific to arc faults and is what drives safe work practices around energized equipment.

This is distinct from calculations and analyses used for other purposes. Ground fault current calculations focus on the current that would flow during a ground fault to size protective devices and ensure proper protection against ground faults. Short-circuit path analysis deals with the fault current paths and the maximum prospective current in a fault, which informs protective coordination and system design. Insulation coordination concerns selecting equipment insulation ratings to withstand overvoltages and ensure adequate clearance and protection. None of these directly provide the arc flash energy at the worker’s location, which is the purpose of the 130.5 incident energy analysis.