I do not have a lot of experience with I.S. Barriers.
My question is fairly simple.
Should you test I.S. Barrier?
How frequently should you test them?
What is the testing procedure for one?
Thank you for all your responses.
Sincerely,
Dan
Update.
The prints I had for this Panel date back to 1954. However, somewhere along the lines someone changed 480 VAC lights to 125 VAC.
Thank you for tips
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