Arc Flash Incident Palo Verde Arizonia 2008

Management used written standard operating procedures (SOP), three-way communications, & Qualified Electricians/Others wearing appropriate Personal Protective Equipment (PPE) to switch breakers.
One breaker failed.
An arc blast occurred which engulfed one Qualified Electrician in a hot fireball.
The PPE worked perfectly.
No one was injured.

No one has explained why the breaker failed.

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