National Electrical Code Article 230 Practice Exam 2025 – All-in-One Guide to Master the NEC!

Question: 1 / 400

How far above grade level can individual open conductors and cables, other than service-entrance cables, be installed?

5 ft

10 ft

The National Electrical Code (NEC) specifies that individual open conductors and cables, with the exception of service-entrance cables, must be installed at a height that ensures safety and reduces the risk of contact with people or equipment. The correct height specified by the NEC is 10 feet above grade level.

This height is in accordance with the requirements set for the protection of pedestrians and to minimize the risk of accidental contact, particularly in outdoor settings where individuals may be present. Proper installation at this standard not only ensures safety but also promotes compliance with regulatory standards, thus safeguarding both the electrical system and the public.

Understanding the correct installation requirements is crucial for electrical professionals to avoid hazards and ensure that all electrical work complies with the NEC, thereby preventing potential accidents or code violations in practical applications.

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15 ft

20 ft

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