NEC - Journeyman Exam Questions and Answers Latest Update 2025 Already Passed
The frame-grounding conductor in a DC trailing cable is usually colored: - Answers Green.
What is the purpose of a thermal strip in an AC linestarter? - Answers To provide overload protection
In most cases, the voltage to ground on branch circuits supplying lampholders, fixtures, or standard
receptacles of 15 amps or less should not exceed: - Answers 150 volts.
According to the diagram below: - Answers Line "A" is a feeder circuit and line "B" is a branch circuit.
If a branch circuit were protected by a 20-amp fuse, what would be the allowable continuous load of the
circuit? - Answers 16 amps.
The voltage drop to the most remote outlet of a branch circuit should not exceed what value for power,
heating, lighting, or combinations thereof? - Answers 3 percent.
The part of the wiring system extending beyond the last overcurrent protective device is called the: -
Answers Branch circuit.
A ______________ is that part of the wiring system extending beyond the last overcurrent protective
device. - Answers Branch circuit.
The minimum wire size of a 15-amp branch circuit is: - Answers No.14 AWG.
What is the minimum-sized grounding conductor that may be used in a DC system? - Answers 8 AWG.
Within one minute after a 550-volt capacitor is disconnected, its residual voltage must be reduced to: -
Answers 50 volts or less.
A 500-volt capacitor is disconnected. Its residual voltage must be reduced to the permitted voltage or
less within: - Answers 1 minute.
The circuit breaker setting is the value of the: - Answers Current at which it is set to trip.
What is the standard shipping length, including one coupling, of rigid conduit? - Answers 10 feet.
Which of the following is required when the conductor bushing at the entrance of a cabinet, junction
box, or pull box is made entirely of insulating materials? - Answers A locknut must be installed on the
conduit both inside and outside the enclosure to which the conduit is attached.
Conduit must be firmly fastened within how many feet of each outlet box, junction box, cabinet, or
fitting? - Answers 3 feet.
What is the maximum-sized electrical metallic tubing that may be used? - Answers 4 inches.
Which device protects the wire from abrasion where conduit enters a disconnect switch box? - Answers
Bushings.
, What is the maximum distance allowed between supports for one-inch diameter rigid metal conduits? -
Answers 12 feet.
Conduit must be clearly and durably identified every: - Answers 10 feet.
What is the minimum-sized metallic tubing that may be used? - Answers 1/2 inch.
What is the minimum-sized diameter allowed for rigid metal conduit? - Answers 1/2 inch.
Rigid metal conduit up to 3/4-inch in size must be firmly fastened within 3 feet of each outlet box or
fitting and be supported at what minimum interval? - Answers Every 10 feet.
A run of conduit less than one inch in diameter must be supported at least every: - Answers 10 feet.
Rigid metal conduit 1/2-inch in diameter must be supported every: - Answers 10 feet.
What is the maximum number of bends allowed in one run of conduit, between outlet and outlet, fitting
and fitting, or fitting and outlet? - Answers 4 quarter bends (360 degrees).
"Grounded conductors" (not the frame ground) will be identified by their color, which is: - Answers
White or natural gray
What minimum length of free conductor should be left at each outlet and switch point for making up
joints, or connecting fixtures or devices? - Answers 6 inches.
Individually covered or insulated grounding conductors should have a continuous outer finish that is: -
Answers Either green or green with one or more yellow stripes.
The secondary winding of a single-phase transformer has a full load current of 30 amperes. The power
leads are single conductor, type TW rated at 60 centigrade. What would be the minimum size conductor
used on the secondary? - Answers No.10 AWG.
In most cases, the minimum-sized (solid or stranded) conductor allowed when wiring a control panel is: -
Answers No. 14 wire.
What color insulation is associated with the frame-grounding conductor? - Answers Green.
Conductors that supply one or more resistance welders must be protected by an overcurrent device
rated or set at not more than: - Answers 300% of the conductor rating.
What color insulation is associated with the grounded, current-carrying conductor? - Answers White.
When reference is made to conductors in the NEC, what type of material is assumed? - Answers Copper.
An electrician knowing a conductors "AWG" can determine the: - Answers Allowable current-carrying
capacity.
"THW" marked on a conductor refers to that conductors: - Answers Application and insulations
The frame-grounding conductor in a DC trailing cable is usually colored: - Answers Green.
What is the purpose of a thermal strip in an AC linestarter? - Answers To provide overload protection
In most cases, the voltage to ground on branch circuits supplying lampholders, fixtures, or standard
receptacles of 15 amps or less should not exceed: - Answers 150 volts.
According to the diagram below: - Answers Line "A" is a feeder circuit and line "B" is a branch circuit.
If a branch circuit were protected by a 20-amp fuse, what would be the allowable continuous load of the
circuit? - Answers 16 amps.
The voltage drop to the most remote outlet of a branch circuit should not exceed what value for power,
heating, lighting, or combinations thereof? - Answers 3 percent.
The part of the wiring system extending beyond the last overcurrent protective device is called the: -
Answers Branch circuit.
A ______________ is that part of the wiring system extending beyond the last overcurrent protective
device. - Answers Branch circuit.
The minimum wire size of a 15-amp branch circuit is: - Answers No.14 AWG.
What is the minimum-sized grounding conductor that may be used in a DC system? - Answers 8 AWG.
Within one minute after a 550-volt capacitor is disconnected, its residual voltage must be reduced to: -
Answers 50 volts or less.
A 500-volt capacitor is disconnected. Its residual voltage must be reduced to the permitted voltage or
less within: - Answers 1 minute.
The circuit breaker setting is the value of the: - Answers Current at which it is set to trip.
What is the standard shipping length, including one coupling, of rigid conduit? - Answers 10 feet.
Which of the following is required when the conductor bushing at the entrance of a cabinet, junction
box, or pull box is made entirely of insulating materials? - Answers A locknut must be installed on the
conduit both inside and outside the enclosure to which the conduit is attached.
Conduit must be firmly fastened within how many feet of each outlet box, junction box, cabinet, or
fitting? - Answers 3 feet.
What is the maximum-sized electrical metallic tubing that may be used? - Answers 4 inches.
Which device protects the wire from abrasion where conduit enters a disconnect switch box? - Answers
Bushings.
, What is the maximum distance allowed between supports for one-inch diameter rigid metal conduits? -
Answers 12 feet.
Conduit must be clearly and durably identified every: - Answers 10 feet.
What is the minimum-sized metallic tubing that may be used? - Answers 1/2 inch.
What is the minimum-sized diameter allowed for rigid metal conduit? - Answers 1/2 inch.
Rigid metal conduit up to 3/4-inch in size must be firmly fastened within 3 feet of each outlet box or
fitting and be supported at what minimum interval? - Answers Every 10 feet.
A run of conduit less than one inch in diameter must be supported at least every: - Answers 10 feet.
Rigid metal conduit 1/2-inch in diameter must be supported every: - Answers 10 feet.
What is the maximum number of bends allowed in one run of conduit, between outlet and outlet, fitting
and fitting, or fitting and outlet? - Answers 4 quarter bends (360 degrees).
"Grounded conductors" (not the frame ground) will be identified by their color, which is: - Answers
White or natural gray
What minimum length of free conductor should be left at each outlet and switch point for making up
joints, or connecting fixtures or devices? - Answers 6 inches.
Individually covered or insulated grounding conductors should have a continuous outer finish that is: -
Answers Either green or green with one or more yellow stripes.
The secondary winding of a single-phase transformer has a full load current of 30 amperes. The power
leads are single conductor, type TW rated at 60 centigrade. What would be the minimum size conductor
used on the secondary? - Answers No.10 AWG.
In most cases, the minimum-sized (solid or stranded) conductor allowed when wiring a control panel is: -
Answers No. 14 wire.
What color insulation is associated with the frame-grounding conductor? - Answers Green.
Conductors that supply one or more resistance welders must be protected by an overcurrent device
rated or set at not more than: - Answers 300% of the conductor rating.
What color insulation is associated with the grounded, current-carrying conductor? - Answers White.
When reference is made to conductors in the NEC, what type of material is assumed? - Answers Copper.
An electrician knowing a conductors "AWG" can determine the: - Answers Allowable current-carrying
capacity.
"THW" marked on a conductor refers to that conductors: - Answers Application and insulations
