An Arc Flash is a dangerous condition associated with the explosive release of energy caused by an electrical arc due to either a phase to ground or phase to phase fault. This fault can result from many factors, including dropped tools, accidental contact with electrical systems, build up of conductive dust, corrosion, and improper work procedures.

Why do I need to do an Arc Flash Hazard Analysis?

Per NFPA 70E-2000, Part II 2-1.3.3 Flash Hazard Analysis states that a “Flash hazard analysis shall be done before a person approaches any exposed electrical conductor or circuit part that has not been placed in an electrically safe work condition.” These Flash Hazard Analysis calculations must be performed to determine the appropriate PPE required for personnel working near any exposed electrical conductor or circuit part. In order to determine the appropriate level of PPE required, the available fault current at the energized electrical equipment being serviced must be known.

A short circuit analysis must be performed to determine available fault currents and arc flash hazards (calculated per IEEE 1584). By doing this analysis, previous studies have shown that minor revisions in breaker settings or fuse changes can lead to major reductions of arc flash hazards.

Why conduct a calculated analysis versus use default tables?

By performing a proper arc flash analysis, you can ensure that your workers have the proper protective safety equipment while avoiding the expenses and lost productivity that may result from over or under specification of PPE that can happen when using default tables of NFPA 70E when an analysis is not performed.

OSHA Requirements:

Workplace safety is governed by OSHA. OSHA has adopted NFPA 70E as a consensus standard for electrical safety. Per OSHA requirements the employer is required to conduct a hazard risk assessment in accordance with OSHA 29CFR1910.132(d)(1) before working on energized parts above 50 volts. If an arc-flash hazard is present, or likely to be present, then the employer must select and require employees to use protective apparel. Employers who conduct the hazard/risk assessment, and select and require their employees to use protective clothing and other PPE appropriate for the task, are deemed in compliance with the Hazard Assessment and Equipment Selection OSHA Standard requirements.

Exactly What Does This Mean TO YOU?

Per NFPA 70E-2000, Part II 2-1.3.3 Flash Hazard Analysis. “Flash hazard analysis shall be done before a person approaches any exposed electrical conductor or circuit part that has not been placed in an electrically safe work condition.

This Flash Hazard Analysis must be performed to determine the appropriate PPE required for personnel working near any exposed electrical conductor or circuit part. In order to determine the appropriate level of PPE required, the available fault current at the energized electrical equipment being serviced must be known.

A short circuit analysis must be performed to determine available fault currents and arc flash hazards (calculated per IEEE 1584). By doing this analysis, previous studies have shown that minor revisions in breaker settings or fuse changes can lead to major reductions of arc flash hazards.

By performing a proper arc flash analysis, you can ensure that your workers have the proper protective safety equipment while avoiding the expenses and lost productivity that will result from over or under specification of PPE that can happen when using default tables of NFPA 70E when an analysis is not performed.

Avoid Common Injuries Caused By ARC Flash:

Burns, Concussions, Loss of Limb, Shrapnel Injuries, Collapsed Lungs, Hearing Loss, Broken Bones & Death.

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