Arc - Flash Hazard Calculator

IMPORTANT SAFETY NOTICEThis calculator provides an indicative estimate only and must not be used as the sole basis for PPE selection or electrical safety decisions. A site-specific PPE assessment should be performed under the guidance of a qualified electrical professional using verified equipment data and applicable standards. Do not rely solely on this calculator when working on or near energized equipment.

System voltage (V) Available fault current (kA)

Clearing time (ms)

Working dist. (mm)

Electrode configuration

Equipment / enclosure type

Gap width (mm)

Encl. height (mm)

Encl. width (mm)

Encl. depth (mm)

Incident Energy

– cal/cm²

Arc flash boundary–

PPE category (NFPA 70E)–

MINIMUM ARC RATING REQUIRED–

Contact Marlbo

This tool provides a preliminary estimate only. Final arc-flash assessment and PPE selection must be verified by a qualified electrical professional using the applicable standards and equipment data.