Code, Standards, and Practices 1, Based on the 2020 NEC Online Materials: Lesson 5 General Building Wire Properties and the NEC Flashcards
A ? is a slender filament of drawn metal.
Select one:
a.
cable
b.
conductor
c.
conduit
d.
wire
wire
The purpose of the conductor is to furnish a path for the flow of electrons.
Select one:
True
False
True
Conductance is the ? with which a material will conduct electricity.
Select one:
a.
ease
b.
difficulty
ease
A good conductor is a material that will contain many ? .
Select one:
a.
bound electrons
b.
floating electrons
c.
free electrons
d.
inner electrons
free electrons
A conductor is a single wire or combination of strands of wire not insulated from one another and capable of carrying an electrical current.
Select one:
True
False
True
There is no perfect conductor, as all materials offer some opposition to the electron flow.
Select one:
True
False
True
NEC 310.3(C) generally requires that conductors, where they are installed in raceways, shall be stranded when the conductor size is ? or larger.
Select one:
a.
10 AWG
b.
8 AWG
c.
6 AWG
d.
none of the above
8 AWG
Steel conduit ? conduct electricity.
Select one:
a.
will
b.
will not
will
A hard-drawn solid copper conductor will have ? tensile strength than a soft-drawn copper conductor.
Select one:
a.
less
b.
more
more
Which statement(s) is/are true, when comparing copper conductors to aluminum conductors?
Select one:
a.
Aluminum has a higher melting point than copper.
b.
Copper has a higher tensile strength than aluminum.
c.
Both a. and b.
d.
Neither a. nor b.
Copper has a higher tensile strength than aluminum.
The title of Article 310 of the NEC is ? .
Select one:
a.
Cabinets, Cutout Boxes, and Meter Sockets
b.
Conductors for General Wiring
c.
Wiring Methods
d.
Wiring Methods and Materials
Conductors for General Wiring
Which of the following is not a metal material recognized by the Code in 311.12(B) for electrical conductors?
Select one:
a.
Aluminum
b.
Copper
c.
Copper-clad aluminum
d.
Silver
Silver
According to Section 110.5, when the Code refers only to a conductor size and the material of the conductor is not specified, the Code intends the use of ? .
Select one:
a.
aluminum
b.
aluminum, copper-clad aluminum or copper
c.
copper
d.
copper or aluminum
copper
Aluminum conductors are terminated in a switch with the use of copper lugs. According to Section 110.14, this is generally ? .
Select one:
a.
acceptable
b.
a violation
a violation
The cross-sectional area of a solid, copper-clad aluminum conductor must contain a minimum of ? copper.
Select one:
a.
2%
b.
5%
c.
10%
d.
15%
10%
NEC Section 310.3(A) establishes the minimum size conductors generally permitted to be used for voltage ratings up to and including 2,000 volts as ? copper or ? aluminum.
Select one:
a.
16 AWG / 14 AWG
b.
14 AWG / 12 AWG
c.
12 AWG / 14 AWG
d.
12 AWG / 12 AWG
14 AWG / 12 AWG
Steel conduit may be used as an equipment grounding conductor as it is capable of conducting electrons under fault conditions.
Select one:
True
False
True
Which statement(s) is/are true when silver is used as a conductor?
Select one:
a.
Care must be taken when working with silver-plated contacts.
b.
Silver is a better conductor than copper.
c.
Both a. and b.
d.
Neither a. nor b.
Both a. and b.
A stranded conductor used as a single conductor is often referred to as a ? .
Select one:
a.
cable
b.
conductor
c.
wire
d.
none of the above
cable
A multiple conductor cable is a combination of two or more insulated conductors under a common jacket.
Select one:
True
False
True
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/kFT, as used in Table 8, means ohms per one thousand feet.
Table 8 has a different resistance listing for a solid and a stranded 10 AWG copper conductor.
Select one:
True
False
True
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
The resistance of a stranded, 8 AWG copper conductor is slightly ? than a solid conductor.
Select one:
a.
less
b.
more
more
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
How many strands of wire are used in the makeup of 6 AWG stranded conductor?
Select one:
a.
1
b.
7
c.
19
d.
37
e.
61
7
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
How many strands of wire are used in the makeup of 1 AWG stranded conductor?
Select one:
a.
1
b.
7
c.
19
d.
37
e.
61
19
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
How many strands of wire are used in the makeup of 4/0 AWG stranded conductor?
Select one:
a.
1
b.
7
c.
19
d.
37
e.
61
19
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
How many strands of wire are used in the makeup of 500 kcmil stranded conductor?
Select one:
a.
1
b.
7
c.
19
d.
37
e.
61
37
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
What is the resistance per 1,000 feet of 8 AWG copper uncoated, stranded conductors?
Select one:
a.
0.308
b.
0.321
c.
0.778
d.
0.809
e.
1.28
0.778
This question is based on Table 8, Chapter 9, of the NEC, titled “Conductor Properties.” Ohm/1,000 ft., as used in Table 8, means ohms per one thousand feet.
What is the resistance per 1,000 feet of 8 AWG aluminum stranded conductors?
Select one:
a.
0.308
b.
0.321
c.
0.778
d.
0.809
e.
1.28
1.28
