NCCER Journeyman Electrician Practice Test
(Latest 2026 Update) Questions and Verified
Answers | 100% Correct | Grade A+
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Terms in this set (50)
Conductors with _____ marked on the THHN
insulation are NOT approved for use
in a wet location. conductors with THHN insulation are approved for
use in dry and damp locations only and conductors
with THWN, THHW, and THW insulation are
recognized for use in dry and wet locations.
, Given: A one-family dwelling unit with 4/0 AWG
a demand load of 200 amperes is
supplied with a 120/240 volt, single- one-family dwelling 120/240 volt, single-phase,
phase, electrical system from the service-entrance conductors to be sized at an
local utility company. What is the ampacity of not less than 83% of the service rating.
MINIMUM size aluminum THW Therefore, 200 amperes x 83% = 166 amperes; size
conductors required for use as 4/0 AWG THW aluminum conductors with an
service-entrance conductors for this allowable ampacity of 180 amperes should be
residence? selected for this dwelling.
Where a 150 kVA, single-phase 625 amperes
transformer having a secondary
voltage of 120/240 is installed at a To find the full-load current rating of the single-
multi-family dwelling, the full-load phase transformer apply the single-phase current
current rating, in amperes, of the formula as shown:I = (150 kVA x 1000) / 240 volts =
secondary is _____. 15,000/240 = 625 amperes
Which one of the following listed 75 amperes
circuit breakers is NOT a standard
ampere rating? the standard ampere ratings for fuses and circuit
breakers. A circuit breaker with an ampere rating of
75 amperes is not a standard ampere rating.
The MINIMUM length of free 6 inches
conductor to be left at each junction
box for the purpose of splicing free conductor is to be left at each junction box for
conductors, or making connections splices or the connection of luminaires or devices.
to illuminares or devices shall be _____ . The intent of this rule is to ensure enough conductor
slack for the terminal connections or splices to be
made easily.
(Latest 2026 Update) Questions and Verified
Answers | 100% Correct | Grade A+
Play your way to mastery with fun games
Match Blocks Charms NEW
Terms in this set (50)
Conductors with _____ marked on the THHN
insulation are NOT approved for use
in a wet location. conductors with THHN insulation are approved for
use in dry and damp locations only and conductors
with THWN, THHW, and THW insulation are
recognized for use in dry and wet locations.
, Given: A one-family dwelling unit with 4/0 AWG
a demand load of 200 amperes is
supplied with a 120/240 volt, single- one-family dwelling 120/240 volt, single-phase,
phase, electrical system from the service-entrance conductors to be sized at an
local utility company. What is the ampacity of not less than 83% of the service rating.
MINIMUM size aluminum THW Therefore, 200 amperes x 83% = 166 amperes; size
conductors required for use as 4/0 AWG THW aluminum conductors with an
service-entrance conductors for this allowable ampacity of 180 amperes should be
residence? selected for this dwelling.
Where a 150 kVA, single-phase 625 amperes
transformer having a secondary
voltage of 120/240 is installed at a To find the full-load current rating of the single-
multi-family dwelling, the full-load phase transformer apply the single-phase current
current rating, in amperes, of the formula as shown:I = (150 kVA x 1000) / 240 volts =
secondary is _____. 15,000/240 = 625 amperes
Which one of the following listed 75 amperes
circuit breakers is NOT a standard
ampere rating? the standard ampere ratings for fuses and circuit
breakers. A circuit breaker with an ampere rating of
75 amperes is not a standard ampere rating.
The MINIMUM length of free 6 inches
conductor to be left at each junction
box for the purpose of splicing free conductor is to be left at each junction box for
conductors, or making connections splices or the connection of luminaires or devices.
to illuminares or devices shall be _____ . The intent of this rule is to ensure enough conductor
slack for the terminal connections or splices to be
made easily.
