An arc-fault is an unintentional arcing condition in a circuit. Arcing creates high intensity heating at the point of the arc, resulting in burning particles that can exceed 10,000 degrees Fahrenheit and may over time ignite surrounding material such as wood framing or insulation. 

There are two types of potentially dangerous arcs – parallel arcs and series arcs. 

Source: Leviton

What Causes Arc-Faults?

Often unseen, arc faults can occur anywhere in the home’s electrical system including:

Within Walls

  • Within walls from nails, screws or staples inadvertently driven into wires.

Within Cords

  • Within electrical cords accidently damaged by furniture resting or pressing upon them.

Within Loose Connections

  • At loose electrical connections or cords damaged by doors closing on them.

Within Damaged Cords

  • Through old or cracked wires or cords as well as wires or cords damaged by heat, sunlight or humidity. 

Prevention and Consequences of Electrical Fires

Source: Leviton