How do Chapters 5, 6 and 7 relate to the general rules found in the earlier chapters?
- They apply only where Chapter 8 refers to them
- They are informational and cannot be enforced
- They replace Chapters 1 to 4 for all occupancies
- They may supplement or modify the general rules
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D. They may supplement or modify the general rules
Chapters 5, 6 and 7 cover special occupancies, special equipment and special conditions, and they can add to or change the general rules for those cases. They do not throw out the general chapters; the general rules still apply except where the special chapter changes them.
Reference: NEC 2023, 90.3
A technician installing communications circuits covered by Chapter 8 asks whether the rules of Chapters 1 through 7 apply to the work. What is the correct answer?
- Always, because Chapters 1 to 4 apply generally
- Never, because Chapter 8 is fully independent
- Only when the inspector asks for them in writing
- Only where Chapter 8 specifically refers to them
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D. Only where Chapter 8 specifically refers to them
Chapter 8 stands apart: the requirements of Chapters 1 through 7 apply to it only where a Chapter 8 article specifically references them. Saying they always apply confuses Chapter 8 with Chapters 5 to 7, which build on the general chapters.
Reference: NEC 2023, 90.3
A Code rule says a certain wiring method 'shall be permitted' in a location. What does that wording mean for the installer?
- The method is the only one that may be used
- The method needs written special permission
- The method is advice that is not enforceable
- The method is allowed but is not required
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D. The method is allowed but is not required
The phrase identifies a permissive rule: an option the installer may choose. It is still Code text, not advice, and it does not make the method the only acceptable one.
Reference: NEC 2023, 90.5(B)