Chapter 3 Wiring Methods And Materials Flashcards
What is the primary focus of Chapter 3 of the Code?
Wiring methods and materials used to rough out an installation.
Chapter 3 contains the general rules for wiring and sizing circuits, overcurrent protection, overvoltage protection, and bonding and grounding.
How many articles are contained in Chapter 3?
Fifty-one articles.
These articles cover general rules applicable to all electrical installations under the NEC.
What does Article 310 cover?
Conductors for general wiring, including insulation markings, ampacity ratings, and specific requirements for single-family dwelling service and feeder conductors.
Article 310 does not apply to flexible cords, fixture wires, or conductors integral to equipment.
What is the trade name for Nonmetallic-Sheathed Cable?
Romex.
Nonmetallic-sheathed cable encloses insulated conductors within a nonmetallic outer jacket.
What conductor sizes does Nonmetallic-Sheathed Cable (Type NM) typically include?
14 AWG through 2 AWG.
This cable contains a separate equipment grounding conductor.
What are the benefits of familiarizing oneself with the various types of cables in Articles 320 through 340?
Understand what is available for work, recognize special NEC requirements, and avoid purchasing incompatible cable.
Knowledge of cable types helps ensure compliance with Code requirements.
True or False: Chapter 3 rules apply to all electrical installations covered by the NEC.
True.
Except as modified in Chapters 5, 6, 7, or specifically referenced in Chapter 8.
Fill in the blank: Article 334 covers _______.
Nonmetallic-Sheathed Cable (Type NM).
This type of cable is commonly used for residential wiring applications.
What do Articles 342 through 390 address?
Specific types of raceways
Refer to Article 100 for the definition of a raceway.
What are the benefits of becoming familiar with various types of raceways?
- Understand what is available for doing the work
- Recognize raceway types having special Code requirements
- Avoid buying a raceway you cannot install due to NEC requirements
What is a metal wireway according to Article 376?
A sheet metal trough with hinged or removable covers for housing and protecting electrical conductors and cables
What must metal wireways be installed as?
Complete and contiguous systems
How does the NEC facilitate locating specific requirements across articles?
By using similar section numbering for similar topics
Where can the rules for securing and supporting be found in each article?
In the section ending with ‘30’ of each article
Fill in the blank: Article 376 covers __________.
[Metal Wireways]
True or False: Metal wireways can be installed in non-contiguous systems.
False
