Journeyman Electrician Practice Exam

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Get ready for the Journeyman Electrician Exam. Study with flashcards, multiple-choice questions, and detailed explanations. Prepare effectively and ensure success on your certification!

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How deep must a plate-type grounding electrode be installed below the surface of the earth?

24 inches
30 inches
36 inches
48 inches

The correct answer is: 30 inches

The requirement for the installation depth of a plate-type grounding electrode is established by the National Electrical Code (NEC). According to NEC guidelines, a plate-type grounding electrode must be buried at least 30 inches below the surface of the earth. This depth is necessary to ensure effective grounding and bonding for electrical systems, providing a reliable path for fault currents and enhancing safety by minimizing the potential for electric shock or fire. The depth requirement is based on various factors, including soil conditions and the need to avoid interference from surface conditions that may affect grounding performance. Therefore, the correct answer reflects the code's intent to ensure safety and effectiveness in grounding practices.