NEC Chapter 9 Flashcards

Questions and Answers

What does Table 1 represent?

Radius of Conduit and Tubing Bends

Percent of Cross Section of Conduit and Tubing for Conductors and Cables (correct)

Dimensions of Insulated Conductors and Fixture Wires

Conductor Stranding

What is described in Table 2?

Conductor Properties

Dimensions and Percent Area of Conduit and Tubing

Percent of Cross Section of Conduit and Tubing for Conductors and Cables

Radius of Conduit and Tubing Bends (correct)

Which table outlines dimensions and percent area of conduit and tubing?

Table 11(A)

Table 5

Table 4 (correct)

Table 9

What does Table 5A depict?

Compact Copper and Aluminum Building Wire Nominal Dimensions and Areas Signup and view all the answers

What type of data does Table 9 provide?

Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) Signup and view all the answers

Which table is related to Class 2 and Class 3 power source limitations?

Table 11(A) Signup and view all the answers

What are the conductor properties detailed in Table 8?

Conductor Properties Signup and view all the answers

What limitations does Table 12(B) address?

PLFA Direct-Current Power Source Limitations Signup and view all the answers

Study Notes

NEC Chapter 9 Tables Overview

Table 1: Provides the percent of the cross section for various conduits and tubing used for conductors and cables.
Table 2: Offers information on the radius measurements for bends in conduits and tubing.
Table 4: Lists dimensions and percent areas specifically for conduits and tubing, accommodating combinations of wires as per Table 1.
Table 5: Details the dimensions for insulated conductors and fixture wires, guiding appropriate installation.
Table 5A: Contains nominal dimensions and areas for compact copper and aluminum building wires, essential for sizing calculations.
Table 8: Compiles properties of conductors, which are critical for understanding electrical characteristics and safety.
Table 9: Displays alternating-current resistance and reactance values for 600-volt cables under specific conditions (3-phase, 60 Hz, temperature up to 75°C).
Table 10: Describes the stranding of conductors, important for flexibility and current carrying capacity.
Table 11(A): Defines limitations for Class 2 and Class 3 alternating-current power sources, vital for compliance and safety regulations.
Table 11(B): Outlines limitations for Class 2 and Class 3 direct-current power sources, ensuring proper application and safety measures.
Table 12(A): Sets forth PLFA (Power Limited Fire Alarm) alternating-current power source limitations, necessary for fire alarm systems.
Table 12(B): Specifies PLFA direct-current power source limitations, helping regulate fire alarm circuit integrity and performance.

Description

Test your knowledge of the National Electrical Code (NEC) Chapter 9 with these flashcards. This chapter covers crucial tables related to conduit and tubing dimensions, bends, and cross-sectional areas for conductors and cables. Perfect for students and professionals seeking to enhance their understanding of electrical installation standards.