109.4 112.1 122.3
For a 120/208-volt, 3Ø, 4-wire supply system the voltage from BØ to neutral is ___.
120
Refer to Figure 112.711. With voltmeter leads placed on the terminals on the luminaire, the meter should indicate a reading of ___ volts. Switch 1 is OFF and Switch 2 is ON.
120
The typical service voltage for one- and two-family dwellings is ___.
120/240-volt, single-phase, three-wire
For a 277/480-volt, 3Ø, 4-wire supply system the voltage from AØ to BØ is ___.
none of these
The ___ conductor must have an outer covering that is either white or gray in color.
grounded
For a 120/240-volt, 3Ø, 4-wire supply system the voltage from AØ to ground is ___.
120
Refer to Figure 112.711. With voltmeter leads placed in the "hot" and neutral slots on the upper half of the receptacle, the meter should indicate a reading of ___ volts. Both Switch 1 and Switch 2 are OFF.
120
Refer to Figure 112.711. With Switch 1 OFF and voltmeter leads placed between the switch terminals (on Switch 1), the meter should indicate a reading of ___ volts.
0
Refer to Figure 112.711. With voltmeter leads placed in the "hot" and neutral slots on the lower half of the receptacle, the meter should indicate a reading of ___ volts. Switch 1 is OFF and Switch 2 is ON.
0
Refer to Figure 112.711. With voltmeter leads placed on the terminals on the luminaire, the meter should indicate a reading of ___ volts. Switch 1 is ON and Switch 2 is OFF.
0
The "hot" conductor of a circuit is referred to as the ___ conductor in the NEC®.
2017 NEC: 100_Ungrounded | 2017 NEC: 100_Voltage to Ground The correct answer is: ungrounded
The color of the insulation of a neutral conductor that is 8 AWG shall be ___.I. white II. bare III. gray
2017 NEC: 200.6(A) The correct answer is: I or III only
Where installed in conduit, the following colors of insulation or marking are permitted to identify "hot" phase conductors.I. black, red, and blue II. brown, orange, and yellow III. pink, black, and blue
2017 NEC: 210.5 The correct answer is: I or II or III
An equipment grounding conductor is permitted to have ___ insulation. I. gray II. white III. green
2017 NEC: 250.119 | 2017 NEC: 400.23 The correct answer is: III only
For a 120/240-volt, 1Ø, 3-wire supply system the voltage from L1 to L2 is ___.
240
An insulated grounded conductor of 6 AWG or smaller shall be identified by a continuous white or gray outer finish or by ___ continuous white stripes on other than green insulation along its entire length.
3
A luminaire has one blue wire and one white wire for field connection. When using cable (NM, AC, or MC for example), the wire connected to the blue wire from the luminaire ___.
Feedback 2017 NEC: 200.7(C)(1) The correct answer is: must have colored insulation (not green or white)
A circuit is energized. When you touch the probes (leads) of a voltmeter across the terminals of a single-pole switch that is in the OFF position, you are completing the circuit.
true
