Question

what must be done when verifying an electrically safe work condition? determine all possible sources of electrical supply open all disconnecting devices for each source of electrical supply apply a lockout - tagout device all of the above

Explanation:

To verify an electrically - safe work condition, one must first determine all possible electrical supply sources. Then, open all disconnecting devices for each source to cut off power. Applying a lockout - tagout device prevents accidental re - energization. So all steps are necessary.

Answer:

D. All of the above