What is an Arc Flash Blast?

AND WHAT IS ALL THE FUSS IS ABOUT?

Arc Flash Blast is a low frequency, high consequence event and is caused when electrical conductors are either unintentionally short between phases or earth. To most people working with electricity, they have never even heard of an arc flash let alone seen one. Yet they can have devastating, life-altering effects.

Don’t just take our word for it. View The Donnie Johnson accident video

Under normal circumstances before any work is undertaken on a conductor it must be made dead and locked out, usually referred to as LOTO (Lock Out Tag Out).

Only in special situations where it is unreasonable in all circumstances that a circuit has to remain live, that permission can be granted for an employee to work live.

Before any decisions can be made a full risk assessment should be undertaken to identify the hazards within the work area and an identification of controls to be taken to reduce the risks.

Only after this process has been completed should the use of PPE be considered and what would be most appropriate.

THIS IS WHAT THE FUSS IS ABOUT!

Just like lightning, Arc Flashes may cause personal injury and death through electric shock, thermal burns and physical trauma. Each injury can be life-threatening so the risk of arc flash must be treated seriously.

Characteristics:
Bright light which much worse than welding flash and is strong enough to blind
Blast pressure which can destroy equipment, knock people over and throw people up to three meters. Ear drums can be ruptured as a result and molten metal can be expelled into the area
Temperatures hotter than the sun which can ignite anything within a given radius.

arc flash blast sequence