Engineering Services by Liam Engineering and Design LLC

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Purpose:
To evaluate the potential incident energy levels during arcing faults and to determine appropriate Personal Protective Equipment (PPE) categories and arc flash boundaries for personnel safety.

Why It Matters:

• Helps ensure compliance with NFPA 70E and IEEE 1584 standards.
• Reduces the risk of catastrophic injuries to maintenance personnel.
• Supports accurate labeling of electrical panels and switchgear with arc flash      hazard information.
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What It Involves:

• Calculating available fault current and clearing times of protective devices.
• Determining incident energy levels (cal/cm²) at various equipment locations.
• Assigning arc flash boundaries and PPE categories.
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Applications:

• Labeling for MCCs, switchboards, panels, and transformers.
• Planning for maintenance and energized work procedures.
• Risk mitigation strategies, such as remote racking or arc-resistant gear.