What is the most common cause of an arc fault flash?

Answer: Improperly configured wire connections
Explanation: Loose neutral wires seem to be a big cause for arcing

Answer: Simple human error
Explanation: Most common things are electric heaters

Answer: Simple human error
Explanation: While human error or carelessness of a worker account for the majority of incidents, arc flash can be the result of a wide variety of causes—static electricity, loose connections, or even a rodent in the vicinity that compromises the distance between energized components.

Answer: Other
Explanation: There is a number of things that can cause arcing

Answer: Other
Explanation: Vacuum cleaners are notorious. Anything with a motor as well. People yanking "on" devices out of outlets.

Answer: Other
Explanation: if there is a load on circuit when disconnected

Answer: Overheated wiring connections
Explanation: Elecricity causes wiring to expand and contract which in turn can loosen connections and cause heat which is interpreted by the breaker as a fault

Answer: Improperly configured wire connections
Explanation: Although arc's can happen for a number of reasons, the most common that is seen is from improper termination of wires. Using the proper wire nuts and methods to terminate the wires is very important. Be sure to read the proper uses of the materials you intend to install.

Answer: Overheated wiring connections
Explanation: Electric is not jock

Answer: Other
Explanation: Many causes