Conductors for General Wiring Quiz

General = Part I Installation = Part III Construction Specs = Part II

False (B)

Dry and Damp Locations = 310.10B Dry Locations = 310.10A Locations Exposed to Direct Sunlight = 310.10D Wet Locations = 310.10C

<p>Conductors in Parallel = G Corrosive Conditions = F Direct-Burial Conductors = E</p> Signup and view all the answers

<p>Table 310.16 (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>310.10C (A)</p> Signup and view all the answers

<p>Type A (D)</p> Signup and view all the answers

<p>1 = 4 2 = 5 3 = 6</p> Signup and view all the answers

<p>Highest value is used (A)</p> Signup and view all the answers

<p>A</p> Signup and view all the answers

<p>Both A and B (C)</p> Signup and view all the answers

<p>Table 310.15(C)(1) (D)</p> Signup and view all the answers

<p>310.10G2 (A)</p> Signup and view all the answers

<p>Number of conductors (B)</p> Signup and view all the answers

<p>Reduced allowable ampacity (B)</p> Signup and view all the answers

<p>7/8&quot;</p> Signup and view all the answers

<p>Must be equal (A)</p> Signup and view all the answers

<p>310.15(C)(1) (A)</p> Signup and view all the answers

<p>310.15E2 (D)</p> Signup and view all the answers

<p>Neutral conductor (A)</p> Signup and view all the answers

<p>Table 311.60(C)(67) through Table 311.60(C)(86) (A)</p> Signup and view all the answers

<p>80 mils</p> Signup and view all the answers

<p>Thermoplastic High Heat-resistant Nylon-coated (A)</p> Signup and view all the answers

<p>60°C (A)</p> Signup and view all the answers

<p>C</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>60°C (A)</p> Signup and view all the answers

<p>A = B B = C C = A</p> Signup and view all the answers

<p>310.15(A) (D)</p> Signup and view all the answers

<p>Stranded (B)</p> Signup and view all the answers

NEC Article 310 governs the selection and installation of conductors for general wiring, excluding fixture wires and flexible cords.

This article defines the specific uses of conductors based on the environment, such as dry, damp, wet, and sunlight-exposed locations.

When running conductors in parallel, specific requirements ensure safe and proper operation, including grounding, connection, and electrical characteristics.

Table 310.16 in the NEC provides ampacity ratings for insulated conductors with voltages up to 2,000 volts.

NEC Table 310.15(C)(1) states that ampacity values must be adjusted when more than three current-carrying conductors are grouped together within a raceway.

The conductor's ampacity for circuits operating between 0 and 2,000 volts depends on the specific circuit length.

Conductors exposed to direct sunlight must be sunlight resistant as per NEC 310.10D.

Conductors installed in wet locations must meet specific criteria outlined in NEC 310.10C for proper operation and safety.

To install conductors directly in the ground, ensure they are type-approved as per NEC 310.10E for such installations.

NEC 310.3A dictates the minimum size for copper and aluminum conductors with voltages up to 2,000 volts based on their operating temperature.

Ampacity values for conductors rated 0 to 2,000 volts can be adjusted to account for variations in ambient temperature according to NEC 310.15.

In circuits where the neutral conductor carries unbalanced loads, it is counted as a current-carrying conductor since it carries current.

The common conductor in a wye-connected system shares the load, and it must be considered in ampacity calculations.

Type USE cable with a 2/0 AWG size has an insulation thickness of 80 mils.

The trade name of THHN and its maximum operating temperature differ depending on whether the location is wet or dry.

Type MTW cable is designed for machine tool wiring with a maximum operating temperature of 60°C in dry conditions.

NEC tables like Table 311.60 provide conductor ampacity limits for higher voltage ratings exceeding 2,000 volts, up to 35,000 volts.

Ampacity limitations indicated in Note 5 of Table 310.4(A) can be found in Section 340.80 of the NEC.

Article 310 of the NEC does not cover fixture wires or flexible cords; these are covered in other sections.

The NEC provides guidelines for installing conductors in different environments, ensuring safe and efficient operation.

Ampacity values for conductors are affected by factors like the number of conductors in a raceway, circuit length, and ambient temperature.

The use of specific conductor types, such as USE and THHN, depends on the location and operating conditions, ensuring compatibility with the environment.

NEC standards help ensure the safe and reliable operation of electrical systems by providing guidance on selecting and installing appropriate conductors.

Understanding the NEC provisions for conductor selection and installation helps ensure safe and efficient electrical practices.

Reference tables in the NEC provide specific guidelines for conductor ampacity and other important parameters, ensuring consistent application of standards.