Master Electrician Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What is the minimum burial depth for direct-buried cables rated at 13,000 volts?

18 inches

24 inches

30 inches

For direct-buried cables rated at 13,000 volts, the National Electrical Code (NEC) specifies a minimum burial depth of 30 inches. This depth is essential to ensure the safety and protection of the cable from physical damage and environmental factors.

Cables operating at higher voltages require greater burial depths to minimize the risk of accidental contact and to reduce the potential for electrical hazards. Additionally, a deeper burial provides protection from the effects of soil movement and other disturbances.

By adhering to this requirement, electricians ensure that the installation meets safety standards and provides reliable performance over the lifespan of the cable.

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36 inches

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