Electrical Arc Flash Demonstration
What can cause an arc flash?
Circuit errors that could result in an arc flash can be brought on by equipment damage and unfavorable electric conditions. Ordinarily, electricity travels through conductors in a closed circuit. Arc flash incidents are uncommon, but they can happen when a system flaw causes an electric current to divert from the intended circuit and pass through iodized air.
Wire corrosion, conductive dust buildup, condensation, insulation gaps, dropped tools, or human error are all potential causes of this. This kind of incident can be avoided by carefully following workplace policies and receiving safety training.
What is an arc flash?
An arc flash is a complex electrical phenomenon. An equipment explosion, a white light flash, radiation release, and a brief rise in temperature of up to 35,000 °F are all signs of this unusual workplace accident. The four categories of unintentional flash events to go over in your safety training are as follows:
Industries where arc flashes might occur
Industries where employees frequently use or handle high-voltage electrical equipment are at risk for arc flash incidents. This is because large electrical panels, motor control centers, electrical switchboards, transformers, disconnected fuses, and metal-clad switch gear are frequently used in these incidents. It is crucial to complete safety training and put on protective gear if there is a chance of coming into contact with an arc flash at work. The following are some professions and industries where arc flash training and safety gear are frequently required:
Engineers use their expertise in science, math, and mechanics to enhance systems and address issues. Engineers occasionally have to support mechanical or electrical work by maintaining electrical systems. The following three engineering positions may require arc flash training and safety gear:
A skilled professional who specializes in a certain field or set of abilities is known as a technical trade person. The following six trade professions that involve electricity and may necessitate arc flash safety training:
Building, drilling, and maintaining structures are all part of the manufacturing and trade branch of the industry called construction. The following three positions in this sector could involve working with or close to high-voltage equipment:
How to prevent arc flashes from happening
Arc flashes can be avoided if compliance measures are followed. Here are five actions you can take as a manager or team leader to promote worker safety:
1. Update electrical systems
Replace dated or dangerous machinery with more recent, incident-causing energy-reducing systems. Even if they are brand-new, it is crucial to perform regular inspections on all electrical apparatus and systems in use. These inspections enable a proactive safety approach and can assist you in addressing and resolving issues with dust accumulation, corrosion, and condensation.
2. Conduct arc flash risk assessment
Arc flash risk assessments can be carried out by licensed electrical engineers on any jobsite. To determine the amount of thermal incident energy in a specific area, they apply their knowledge of specialized equipment and their expertise. This measurement helps determine workers’ required personal protective equipment (PPE), safety levels, and precautionary distance.
3. Complete arc flash labeling
High-voltage equipment must be properly labeled, according to both the Occupational Health and Safety Act (OSHA) and the National Electric Code (NEC). The label must be accepted by the American National Standards Institute (ANSI), explain any potential arc flash risk, and specify the precise safety measures that should be taken. Make sure that no one works in a high-voltage or electrical panel area that lacks this label until it has been added.
4. Wear arc flash safety equipment
There are numerous wearable safety items available to help safeguard employees from harm. These include fire retardant coveralls and coats, full-body protection suits, Kevlar face shields and hoods, and rubber voltage gloves. It’s essential to wear this gear under high-voltage conditions to keep the workplace safe.
5. Implement arc flash safety training
To help keep people and workplaces safe, OSHA offers free compliance training resources, videos, labels, and posters. Before anyone on your team touches any electric panels or high-voltage equipment, make sure they have received thorough and appropriate safety training. Following their participation in arc flash safety training, crew members should be able to do the following four things:
Where to find arc flash training programs
Many private organizations offer training programs and certifications in addition to the OSHA training videos. Arc flash training is standard practice in the industry, and OSHA mandates that high-voltage equipment and workspaces be properly labeled. Although there isn’t a common arc flash training certification, you can obtain a private certificate by finishing a training course or receiving instruction from an arc flash training consultant. The following is a list of private training options you might want to take into account: