WorksheetsConductors and Cables (Electrical L1) Quiz
Total questions: 15
Worksheet time: 8mins
The maximum size solid wire that should be terminated in pull boxes and disconnects is _____.
No. 6
No. 10
No. 8
No. 12
The ampacity ratings of conductors can be found in _____.
NEC Chapter 1
NEC Chapter 9
NEC Articles 348 through 352
NEC Tables 310.16 through 310.21
To determine the ampacity of copper conductors where they are used as a single conductor in free air at ambient temperatures of 86°F (30°C), use _____.
NEC Table 310.16
NEC Table 310.19
NEC Table 310.18
NEC Table 310.17
Compact stranding is used _____.
when installing larger conduit sizes
with aluminum conductors
in corrosive environments
when decreasing the ampacity of an existing service
PE is used primarily for _____.
insulation of control and communications wiring
the manufacture of TW and THW insulation
high-voltage cables
high-temperature insulation
Type USE cable can be used for _____.
underground installation including direct burial
aboveground installation only
indoor applications only
underground installation within a special PVC pipeline
What letter must be included in the marking of a conductor if it is to be used in a wet, outdoor application?
O
I
D
W
When used as a service-entrance cable, Type SE cable must be installed as specified in _____.
NEC Article 230
NEC Section 210.5(C)
NEC Section 110.12
NEC Section 402.3
A type of thermoset insulation is _____.
PVC
THHW
THW
XHHW
RHW
What service conductor may be bare, green, or green with a yellow stripe?
The neutral conductor of a multiconductor cable
The ungrounded conductor of a multiconductor cable
The high leg of a four-wire, delta-connected secondary
The equipment grounding conductor of a multiconductor cable
To prevent unwanted ground loops, instrumentation cable shielding is _____.
floated on both ends
grounded at both ends of the wire
always ungrounded
grounded at one end of the wire
In some cases, fixture wires may be used for _____.
signaling wiring
SE cable
branch circuit wiring
240V appliance wiring
Ideally, a pull should be made in _____.
four or more short segments
six or more short segments
one continuous operation
two or more short segments
What is the difference between Type AC cable and Type MC cable?
AC cable has fire-retardant paper wraps on individual conductors; MC cable does not.
AC cable has a maximum of four conductors; MC cable has a maximum of six.
AC cable has a bonding strip; the MC ground is its metal cladding.
AC cable is sized from 10 AWG to 4/0 AWG; MC cable is sized from 18 AWG to 2,000 kcmil.
What are the colors of insulation on the conductors for a three-conductor NM cable?
Two white or gray and one red
One green, one white or gray, one blue, and an equipment grounding conductor
One white or gray, one red, and one black
One white or gray, one red, one black, and an equipment grounding conductor
