So it seems there's really nothing you can do to prevent it. besides not dropping any tools...... or de-energizing.
Considering most of my work is existing equipment, and I'm on the servicing end, I just have to deal with the inherent risk. I do notice the newer panels have cardboard seperators between the legs, and are better shielded on the inside than a 20 year old panel.
also, with all this AF information, I am not as comfortable anymore opening a panel. which is good and bad in a sense.
Is the arc flash risk less if a service entrance panel is unloaded ? by unloaded I mean turning off all of the loads, HVAC's, sub panels, etc, etc. or would I presume currently the arc flash risk is higher with a few hundred amps flowing through the panel ?????
I'm not talking about OSHA rules, or PPE ratings, just wondering the science behind arc flash.