Journeyman Electrician Practice Test / Actual Exam
Questions & Answers with Rationales (A+ Guide Solution)
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Terms in this set (50)
Conductors with _____ marked on the insulation are NOT THHN
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 a demand load of 4/0 AWG
200 amperes is supplied with a 120/240 volt, single-
phase, electrical system from the local utility company. one-family dwelling 120/240 volt, single-phase, service-entrance conductors to
What is the MINIMUM size aluminum THW conductors be sized at an ampacity of not less than 83% of the service rating. Therefore,
required for use as service-entrance conductors for this 200 amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum conductors
residence? with an allowable ampacity of 180 amperes should be selected for this
dwelling.
, Where a 150 kVA, single-phase transformer having a 625 amperes
secondary voltage of 120/240 is installed at a multi-
family dwelling, the full-load current rating, in amperes, To find the full-load current rating of the single-phase transformer apply the
of the secondary is _____. single-phase current formula as shown:I = (150 kVA x 1000) / 240 volts =
15,000/240 = 625 amperes
Which one of the following listed circuit breakers is 75 amperes
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 conductor to be left at 6 inches
each junction box for the purpose of splicing
conductors, or making connections to illuminares or free conductor is to be left at each junction box for splices or the connection
devices shall be _____ . of luminaires or devices. The intent of this rule is to ensure enough conductor
slack for the terminal connections or splices to be made easily.
In general, overhead service-drop conductors shall 8 AWG copper
NOT be smaller than _____.
overhead service-drop conductors to be not smaller than 8 AWG copper or 6
AWG aluminum or copper-clad aluminum. Do not get service-drop
conductors, the overhead conductors between the utility electric supply
system and the service point, confused with the service-entrance conductors,
the conductors from the service point from the utility company to the service
disconnecting means.
When a galvanized eye-bolt is to be used as the point 10 ft.
of attachment for an electrical service, the NEC
requires the eye-bolt to be installed NOT less than _____ provide adequate vertical clearance of the conductors and prevent physical
above finished grade. damage to the conductors and prevent persons from making accidental
contact with the conductors which may create a shock hazard or electrocution.
In no case shall the point of attachment of the service-drop conductors to be
less than 10 ft. above finished grade.
Why is electrical continuity required for metallic To establish an effective ground-fault path and facilitate the operation of the
conduit? over-current protective device.
Electrical continuity is required for metallic conduit to establish an effective
ground-fault path and facilitate the operation of the overcurrent protective
device.
Questions & Answers with Rationales (A+ Guide Solution)
Newest 2025/2026
Leave the first rating
Play your way to mastery with fun games
Match Blocks Charms NEW
Students also studied
Flashcard sets Study guides
Journeyman Electrician Exam 3 RCW/WAC Journeyman Electrician Practice Tes... 26
25 terms 30 terms 50 terms 54
JoeDaddy Preview DarkOcta Preview Izzymarlee02 Preview
Terms in this set (50)
Conductors with _____ marked on the insulation are NOT THHN
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 a demand load of 4/0 AWG
200 amperes is supplied with a 120/240 volt, single-
phase, electrical system from the local utility company. one-family dwelling 120/240 volt, single-phase, service-entrance conductors to
What is the MINIMUM size aluminum THW conductors be sized at an ampacity of not less than 83% of the service rating. Therefore,
required for use as service-entrance conductors for this 200 amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum conductors
residence? with an allowable ampacity of 180 amperes should be selected for this
dwelling.
, Where a 150 kVA, single-phase transformer having a 625 amperes
secondary voltage of 120/240 is installed at a multi-
family dwelling, the full-load current rating, in amperes, To find the full-load current rating of the single-phase transformer apply the
of the secondary is _____. single-phase current formula as shown:I = (150 kVA x 1000) / 240 volts =
15,000/240 = 625 amperes
Which one of the following listed circuit breakers is 75 amperes
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 conductor to be left at 6 inches
each junction box for the purpose of splicing
conductors, or making connections to illuminares or free conductor is to be left at each junction box for splices or the connection
devices shall be _____ . of luminaires or devices. The intent of this rule is to ensure enough conductor
slack for the terminal connections or splices to be made easily.
In general, overhead service-drop conductors shall 8 AWG copper
NOT be smaller than _____.
overhead service-drop conductors to be not smaller than 8 AWG copper or 6
AWG aluminum or copper-clad aluminum. Do not get service-drop
conductors, the overhead conductors between the utility electric supply
system and the service point, confused with the service-entrance conductors,
the conductors from the service point from the utility company to the service
disconnecting means.
When a galvanized eye-bolt is to be used as the point 10 ft.
of attachment for an electrical service, the NEC
requires the eye-bolt to be installed NOT less than _____ provide adequate vertical clearance of the conductors and prevent physical
above finished grade. damage to the conductors and prevent persons from making accidental
contact with the conductors which may create a shock hazard or electrocution.
In no case shall the point of attachment of the service-drop conductors to be
less than 10 ft. above finished grade.
Why is electrical continuity required for metallic To establish an effective ground-fault path and facilitate the operation of the
conduit? over-current protective device.
Electrical continuity is required for metallic conduit to establish an effective
ground-fault path and facilitate the operation of the overcurrent protective
device.
