RMF Engineering - Arc Flash Experts

Arc Flash Defined

Arc flash is the energy that is given off when there is an electrical short in a piece of equipment while someone is interacting with the equipment while the power feed remains energized. The event is comprised of a violent blast of heat, pressure and light that can injure or kill workers and even bystanders. When an arc flash occurs, the heat generated can be hotter than the sun.

Facts About Arc Flash


Professionals performing inspections

1: What OSHA Requires You To Do

  • Owners are required to perform an Arc Flash Analysis prior to allowing anyone to work on their equipment
  • NFPA 70 requires that you label all panels with the level of energy that is available from a fault as well as the category of PPE gear required
  • NFPA 70E outlines what type of PPE must be worn for each category

2: How Arc Flash Can Injure Your Staff

The power of the blast can vaporize metal and create a shockwave that is capable of hurling objects up to 700 miles per hour or 2,000 pounds per square foot. The most common injuries as a result of arc flash depend heavily on the strength of the blast, but can range from concussion, loss of hearing, blindness, severe burns, electrical shock, ingestion of vaporized copper resulting in severe injury and / or death.

3: Where Arc Flash Occurs

Arc flash incidents are especially impactful in mission critical facilities such as hospitals, data centers, research facilities and financial institutions. These types of facilities cannot afford to cut power to devices and therefore often require their maintenance staff to service the equipment without powering it down. The most dangerous arc flash incidents typically occur in commercial and institutional facilities where conditions of maintenance are less rigorous.

4: The Liability You Face

  • 5-10 arc flash events occur each day in the U.S.
  • Loss of systems and equipment for extended periods of time
  • Business disruption
  • Employee injury or death
  • Your company exposed to millions of dollars in law suits by not being in compliance with NFPA codes as enforced by OSHA for workers not wearing proper protective equipment
  • Negative public relations as a result of service outages

Want to Learn More About Arc Flash? Email Us.

Why RMF for Arc Flash Hazard Analysis


Inspections in process with appropriate PPE.

Unlike the competition, we cover the entire gamut of engineering services, enabling us to see more and do more for you. Our assessment technology services are second-to-none. And we’re accustomed to rolling up our sleeves and getting into the trenches. This is what sets us apart from most engineering firms. While we’re in the trenches, we have a full support staff back at the office with the brain power and technology to deal with the sophisticated analysis of systems comprised of thousands of components.

1: Manage the Risk and Manage the Investment

RMF helps you manage the risk and manage the investment so that costs can be incurred when required. By bringing us in, you will receive a plan that addresses arc flash compliancy in a scheduled, planned fashion while achieving the best value by addressing your facility’s most critical needs first. We then apply our expertise to the areas of greatest concern.

2: We Put Our Team On Your Site

Our first step includes an on-site survey of your equipment so that we understand your entire electrical system including:

  • Settings on breakers
  • Conductor sizes
  • Over-current protection
  • Available fault current from the utility company

We then create detailed drawings of systems and calculate the levels of energy by accumulation of the arcing current for a duration determined by the trip settings of the upstream over current devices. This data enables us to determine hazard levels, which in-turn allows us to take corrective action by lowering potential hazards. We lower these hazards by adding devices that will decrease the action time required for clearing a fault and then applying the proper labels to equipment that detail hazard levels, what safe working distances are, and what type of PPE gear the worker needs.

3: Large Facilities With Multiple Buildings

RMF has the technical resources and expertise to perform arc flash analysis on large facilities with multiple buildings, such as healthcare institutions and universities and bring these facilities into complete compliance with NFPA 70E. Services typically provided include:

  • Perform field investigation to gather all necessary information about your electrical system
  • Prepare calculations to determine levels of incident energy from available arcing fault current
  • Examine multiple operating scenarios and determine the best setting for existing protective devices to minimize the incident energy levels associated with arcing fault current
  • Make recommendations to upgrade system components with modern equipment in order to minimize Hazard Risk Categories (HRC) throughout the facility
  • Print and install the appropriate labels to indicate the HRC classification of the equipment
  • Provide required NFPA 70E training and education to your employees

Need a Professional? Email Us at arcflash@rmf.com.

Hire an Expert

Arc Flash compliancy can be overwhelming. We're here to help. Email or call us (1-800-938-5760) today for a no cost education meeting. Our experts will explain how to tackle the requirements and help you determine the best way RMF can plugin and help.

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RMF Can Also Help With:

  • Facility growth and asset renewal through the development of an infrastructure master plan covering all electrical system and energy use equipment
  • Detailed engineering to correct found deficiencies and operational hazards
  • Understanding your big picture needs and helping you visualize how to balance your arc flash needs with all your facility’s competing requirements such as steam, chilled water, emergency power, heating, cooling, IT and energy conservation