Exam (elaborations)
JOURNEYMAN ELECTRICIAN PRACTICE TEST
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JOURNEYMAN ELECTRICIAN PRACTICE TEST
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JOURNEYMAN ELECTRICIAN PRACTICE TESTConductors with _____ marked on the insulation are NOT approved for use in a wet
location. - Answers -THHN
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.
When a galvanized eye-bolt is to be used as the point of attachment for an electrical
service, the NEC requires the eye-bolt to be installed NOT less than _____ above
finished grade. - Answers -10 ft.
provide adequate vertical clearance of the conductors and prevent physical 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 conduit? - Answers -To establish an
effective ground-fault path and facilitate the operation of the 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.
In dwelling units, receptacle outlets installed for countertop surfaces, must be located
above, but NOT more than _____ above the countertop or work surface. - Answers -20
inches
receptacle outlets installed for countertop or work surfaces in dwelling units may be
located on or above, but not more than 20 in. above the countertop or work surface. The
intent of this rule is to eliminate the use of unsightly extension cords (which reduces the
amount of usable countertop space) on the countertop or work surface to supply cord-
and-plug connected appliances. Also, receptacles located more than 20 inches above
countertops or work surfaces may interfere with the cabinetry to be installed.
When conductors are installed in a conduit or tubing nipple of _____ or less in length,
the ampacity adjustment factors for more than three (3) current-carrying conductors in
the raceway, are not required to be applied. - Answers -24 inches
adjustment factors for more than three (3) current-carrying conductors in raceways shall
not apply where the raceway is not more than 24 inches in length. Where more than 3
current-carrying conductors are installed in short lengths of conduit or tubing, the
heating effect caused from the additional conductors is insignificant therefore, the
allowable ampacity of the conductors is not greatly reduced.
, In compliance with the NEC, the total marked rating of a 120-volt, cord-and-plug-
connected room air conditioner shall not exceed _____ of the rating of a branch circuit
when lighting units, general-use receptacles, or other appliances are supplied from the
branch circuit. - Answers -50%
the special provisions for room air conditioners which are (1) rated not over 250-volts
ac, single-phase and (2) which are cord-and-attachment plug connected. In order to
prevent overloading the branch circuit, as per Section 40.62(C), the total rating of the
A/C unit shall not exceed 50% of the rating of a branch circuit where lighting units,
general-use receptacles or appliances are also supplied.
What shall not be located over the steps of a stairway? - Answers -overcurrent devices
"overcurrent devices shall not be located over steps of a stairway." This requirement
address a serious safety issue. No one should be required to stand on different treads
on a stairway to replace, repair, maintain, install, troubleshoot, or reset overcurrent
devices in a panelboard or switchboard located in a stairway.
Where a permanently installed outdoor swimming pool is located on residential or
commercial properties, at least one (1) single-phase, 125-volt, 15- or 20-ampere
receptacle shall be located not less than _____ from and not more than _____ from the
inside wall of the swimming pool. - Answers -6 feet - 20 feet
apply to the installation of wiring methods and equipment in or adjacent to permanently
installed swimming pools.
each permanently installed swimming pool is to be provided with at least one (1) single-
phase, 15- or 20-ampere, 125-volt, receptacle placed not closer than six (6) feet from
the pool and not more than twenty (20) feet from the pool.
This requirement allows ordinary appliances such as a radio, to be safely plugged in
and used near the pool, but avoids the need for extension cords in the pool vicinity. Be
advised the receptacles must be provided with
Metal water pipes installed in or attached to a building or structure shall be bonded to
_____.
a. the service equipment enclosure
b. the grounded conductor at the service
c. the grounding electrode conductor
d. any of the above - Answers -Any of the above
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a
120/240 volt, single-phase, electrical system from the local utility company. What is the
MINIMUM size aluminum THW conductors required for use as service-entrance
conductors for this residence? - Answers -4/0 AWG
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