Given: Telecom wiring for an entire street is installed underground. It is run so it will avoid accidental contact with the commercial, 480 volt power circuits. The telecom wiring has no metallic shield. Which of the following installation requirements apply to the telecom wiring in this situation?

Given: Telecom wiring for an entire street is installed underground. It is run so it will avoid accidental contact with the commercial, 480 volt power circuits. The telecom wiring has no metallic shield. Which of the following installation requirements apply to the telecom wiring in this situation?