What is An Arc Flash

It stands to reason that if equipment fails or is improperly designed or installed, an Arc Flash incident could be caused. Faulty system design can also contribute to an increased likelihood of Arc Flash incidents, also known as electrical flashovers. Damage to insulation, gaps, or wear and tear can also create the pathways needed for an unwanted electric discharge through the air. Exposed live parts or loose connections could also be the culprits. Regular inspections of your electrical systems and equipment will help to predict and prevent Arc Flash incidents.

There are other factors which can increase the likelihood of an Arc Flash incident. These causes include:

– Corrosion of electrical equipment
– A build up of dust, which can conduct an electrical charge
– Moisture or vapor, which can also conduct an electrical charge
– Animal contact – mice, for example, can create the route needed for an Arc Flash to occur

Human error is the most common cause of Arc Flash incidents. It could be a gang breaking ground and hitting a cable not marked on the services plan, a test probe touched to the wrong surface, or a tool dropped accidentally which hits a live switchgear. Other ways that human error can cause an Arc Flash are through the improper installation of equipment, preventative maintenance that isn’t carried out properly (or at all) and failing to de-energise equipment where it’s possible. A lack of appropriate training can increase the chances of human error causing an incident. But distractions, weariness, the pressure to get the job done quickly and restore power, or just an overly-relaxed attitude can make electrical engineers bypass safety procedures, which can all too easily result in a dropped tool or making contact between energised conductors.