Arc Flash

Morrow Engineering can perform the Arc Flash Hazard Analysis required for your compliance with OSHA Standards 29-CFR, Part 1910 and NFPA 70E. Because of our process, we are able to collect the required data with little or no interruption to your facility.

We design the Arc Flash Hazard Analysis to meet your needs. Wherever you are in the process of developing an Arc Flash Hazard Safety Program, Morrow can help. A list of some of our services is shown below.

Arc Flash Hazard Analysis calculates the bolted fault current at each bus and through each protective device. The arcing fault current through the protective devices is calculated from the bolted fault current value and used to find the time duration of the arc from the time current coordination curves. Incident energy and arc flash boundaries are calculated based on the distance, the arcing fault current and fault duration.

The Arc Flash Hazard Analysis will give your company the required information, per NFPA 70E, to label each piece of electrical equipment or enclosure you have requested.

As an extension of the standard Arc Flash Hazard Analysis we often provide recommendations to lower your existing Arc Flash Hazard level. By reducing the Arc Flash Hazard level, you reduce the amount of Personal Protective Equipment (PPE) required.

Additionally, we can provide and/or install Arc Flash Hazard Warning Labels as dictated by the results of the Arc Flash Hazard Study. We have standard templates designed to meet NEC 110.16 and NFPA 70E or we can design and print custom labels to meet your requirements.
Morrow Engineering Inc. Arc Flash Warning Labels

If requested, we will supply the required protective equipment needed to meet your Arc Flash Hazard needs.

Morrow can educate your employees on the dangers of an Arc Flash incident and explain what procedures to follow to protect your employees from an Arc Flash incident.

A short circuit study models the current that flows in the power system under abnormal conditions and calculates the maximum available fault current in the electrical power system. With this information, Morrow will provide the required minimum bracing and interrupting rating values of your equipment. We will also list the equipment that is overdutied and suggest recommendations on how to address this issue.

As an extension of the Arc Flash Hazard Analysis, Morrow can create TCC (Time Current Coordination) curves for all the protective devices. Using the TCC curves, we can show the damage curves for your equipment and assure that the overcurrent protective device closest to the fault will clear the fault and the damage due to the fault will be kept to a minimum.

Since an Arc Flash Hazard Analysis requires up-to-date system information, now is the time to update existing or create new single line diagrams of your electrical system.

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