Question

to verify an electrically safe work condition, all these conditions should be confirmed except: the presence or absence of voltage sources of electrical supply are determined phase conductors are grounded disconnecting devices are closed

Explanation:

To verify an electrically - safe work condition, disconnecting devices should be open to prevent the flow of electricity. Confirming the presence or absence of voltage, determining sources of electrical supply, and grounding phase conductors are important safety measures.

Answer:

Disconnecting devices are closed