A question arose today and I am turning to you for an answer. If you turn off a 480V disconnect switch and open the door. Everyone understands that the top of the switch is still energized. However, if the switch is designed with an arc shield covering the lugs. Are they still considered to be exposed live parts?
The reason I'm asking is this would decide if our electricians have to wear full arc protection gear or not? Which is a hassle!
To elaborate on my scenario, The switch will remain open at all times. The only live parts are covered and protected by the plastic cover that is part of the disconnecting means. I've searched the NFPA 70E handbook but they do not cover this situation. I have to present my findings to the safety committee so any references you could supply would be helpful!
Thanks in advance for your responses.
