Causes of arc flashing and its prevention

Causes of arc flashing

 

It is important to understand that an arc flash is a type of electrical explosion that occurs when there is a path outside of the electrical system through which the current can easily flow. Understanding some of the most common causes of arc flashes can help individuals identify potential hazards in the workplace and take steps to prevent these incidents from occurring. Some common situations that can lead to an arc flash include:

• A dusty work environment: Dust can be a good conductor of electricity and can build up around electrical systems, increasing the risk of an arc flash.

• Use of uninsulated tools: Using uninsulated tools to work on electrical systems can create a low-resistance path for electricity to travel, potentially leading to an arc flash.

• Carelessness or overconfidence: Employees who are careless or overconfident while working on electrical systems can make mistakes that increase the risk of an arc flash. This could include insulating systems incorrectly or placing conductors too close to each other.

• Corrosion: Over time, wires and other electrical components can corrode, exposing the electricity to the open air and increasing the risk of an arc flash.

• Water or other liquids: Water is a good conductor of electricity and can create a path for the current to travel, increasing the risk of an arc flash. High humidity, splashes, or other similar conditions can also increase the risk.

It is important to be aware of these factors and take steps to minimize the risk of an arc flash in the workplace.

How do I prevent an arc flashing from happening?

 

It is essential to take all necessary precautions to avoid an arc flash when working with high voltage systems. Arc flashes are among the most dangerous types of incidents that can occur, and it is essential for all facilities to have a plan in place to prevent them. An effective workplace safety program should include the following measures to reduce the risk of an arc flash:

 

• Arc Flashing Hazard Analysis

 

It is important to regularly conduct an arc flash hazard analysis to identify potential risks for an arc flash and take appropriate measures to mitigate them. This analysis is typically performed by an experienced electrical engineer and involves a thorough assessment of the electrical system to identify any areas of elevated risk. By performing this analysis on a regular basis, it is possible to identify potential issues and take the necessary precautions to prevent an arc flash from occurring.

 

• De-energize systems

 

The most effective way to prevent an arc flash is to de-energize and ground the electrical system before working on it. This involves disconnecting the power source and ensuring that all electricity has been dissipated from capacitors, batteries, and other power sources. While it may not be practical to de-energize the system in all situations, this is the recommended procedure whenever it is possible to do so. By taking these precautions, it is possible to significantly reduce the risk of an arc flash occurring.

 

• Keep equipment well maintained

 

Neglecting equipment is one of the leading causes of arc flash incidents. Worn wires, faulty safety equipment, and other issues can all contribute to the risk of an arc flash. It is essential to follow the maintenance schedule for all major machinery and electrical systems to ensure that they are operating safely and to reduce the risk of an arc flash occurring. Regular maintenance can help identify and address potential issues before they become serious problems, helping to prevent arc flash incidents and ensure a safe work environment.

 

• Keep work area clean

 

Maintaining a clean and organized work area is important for safety, especially when working with electrical systems. A buildup of dust, sawdust, and other contaminants in the area around an electrical system can significantly increase the risk of an arc flash occurring. These substances can provide a path for electricity to escape from the system, which can be dangerous. By keeping the work area clean and free of debris, it is possible to reduce the risk of an arc flash and ensure a safe work environment.

 

• Keep people away

 

Accidentally bumping into a wire or other electrical component can trigger an arc flash. To prevent this from happening, it is important to keep areas where electrical components are present clear of unnecessary personnel. This can be achieved through the use of floor marking tape, barricades, or other means to indicate the location of electrical equipment and restrict access to authorized personnel. By taking these precautions, it is possible to reduce the risk of an arc flash caused by accidental contact with electrical components.

 

• Personal Protection Equipments

 

Personal protective equipment (PPE) is designed to protect individuals from the hazards of an arc flash, but it can also help prevent these incidents from occurring in the first place. PPE that is non-conductive, such as gloves and protective clothing, can help to prevent the flow of electricity through the body in the event of an accidental contact with an electrical component. By using PPE when working with electrical systems, it is possible to both reduce the risk of an arc flash occurring and provide protection in the event that one does occur.