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Questions and Answers
What are the two basic types of rules in the NEC?
What are the two basic types of rules in the NEC?
- Optional rules
- Discretionary rules
- Permissive rules (correct)
- Mandatory rules (correct)
Mandatory rules contain the words _____
Mandatory rules contain the words _____
Shall or Shall not
Permissive rules identify _____
Permissive rules identify _____
Actions that are allowed but not required
Permissive rules are indicated by the phrases _____
Permissive rules are indicated by the phrases _____
What do NEC Chapters 1, 2, 3, and 4 present?
What do NEC Chapters 1, 2, 3, and 4 present?
What do NEC Chapters 5, 6, and 7 concern?
What do NEC Chapters 5, 6, and 7 concern?
What does NEC Chapter 8 cover?
What does NEC Chapter 8 cover?
What does NEC Chapter 9 contain?
What does NEC Chapter 9 contain?
What word or phrase best describes the NEC requirements for the installation of electrical systems?
What word or phrase best describes the NEC requirements for the installation of electrical systems?
Mandatory and permissive rules are defined in ____
Mandatory and permissive rules are defined in ____
Examples of branch circuit calculations can be found in _____
Examples of branch circuit calculations can be found in _____
Cable trays are covered in ____
Cable trays are covered in ____
Where in the NEC would you find information on conductors for general wiring?
Where in the NEC would you find information on conductors for general wiring?
Where in the NEC would you find information on switchboards and panelboards?
Where in the NEC would you find information on switchboards and panelboards?
Installation procedures for lighting fixtures are provided in ____
Installation procedures for lighting fixtures are provided in ____
Theaters are covered in_____
Theaters are covered in_____
NEC Article 600 covers_____
NEC Article 600 covers_____
How many chapters form the broad structure of the NEC?
How many chapters form the broad structure of the NEC?
NEC chapter 2 covers _____
NEC chapter 2 covers _____
What NEC Article covers electric motors?
What NEC Article covers electric motors?
To size grounding conductors, refer to ____
To size grounding conductors, refer to ____
Wiring methods are covered in ____
Wiring methods are covered in ____
Gas stations are covered in ____
Gas stations are covered in ____
Emergency systems are covered in ____
Emergency systems are covered in ____
Fire alarm systems are covered in ____
Fire alarm systems are covered in ____
Definitions are covered in ____
Definitions are covered in ____
X-ray equipment is covered in ____
X-ray equipment is covered in ____
Electric signs are covered in ____
Electric signs are covered in ____
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Study Notes
NEC Overview
- Two fundamental types of rules: mandatory and permissive.
- Mandatory rules must be followed, indicated by "shall" or "shall not."
- Permissive rules outline allowable actions, indicated by "shall be permitted" or "shall not be required."
NEC Chapters 1-4
- Chapters 1 to 4 cover rules for the design and installation of electrical systems applicable to all installations.
- Chapter 2 specifically addresses wiring and protection.
- Article 310 provides information on conductors for general wiring.
NEC Chapters 5-7
- Chapters 5, 6, and 7 focus on special occupancies, equipment, and conditions, modifying rules from Chapters 1-4.
- Chapter 5 pertains to gas stations.
- Chapter 7 covers emergency systems and fire alarm systems.
NEC Chapters 8-9
- Chapter 8 deals with communications systems, including telephone and television.
- Chapter 9 contains tables referenced by other chapters in the NEC.
Important Articles
- Article 90 defines mandatory and permissive rules.
- Article 392 discusses cable trays.
- Article 408 contains information on switchboards and panelboards.
- Article 410 outlines installation procedures for lighting fixtures.
- Article 520 addresses requirements for theaters.
- Article 600 covers electric signs and outline lighting.
- Article 430 is relevant for electric motors.
- Article 100 provides definitions in Chapter 1.
- Article 660 specifically covers X-ray equipment.
General Information
- The NEC consists of nine chapters.
- Minimum requirements are established for electrical system installations.
- Examples of branch circuit calculations are found in Informative Annex D.
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