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Electrical Code Test Exam 2024/2025 Questions With Completed & Verified Solutions.
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Electrical Code Test Exam 2024/2025 Questions With Completed & Verified Solutions.
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Electrical Code TestWhich item below would be considered part of the company general overhead?
Telephone at the contractor's office
What is not included in Company Overhead?
Body Bonds
0:03
/
0:15
Brainpower
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What does JIT stands for on a job site in regards to deliveries?
Just in time
What La One Call is used what determines their start and stop points for marking?
The area the contractors designates that he is working in
Normally, the best way to keep costs down is to have deliveries made?
At the time the materials are needed (JIT)
Under water lighting fixtures are in the walls of the permanently installed swimming pool.
Disregard NEC exceptions. The top of the fixture lens must be at least _________ inches below
the normal water level of the pool.
18
Given: An installation for which the NEC requires a second "made" grounding electrode to
supplement the first. What is the minimum distance allowed between these two electrodes?
6'
A 120/208 volt three phase service is fed with a single size 500 kcmil copper conductors for
each phase. A copper grounding electrode conductor from the main service panel to the cold
water pipe line mist be at least size _________.
,1/0 AWG
A metal raceway protects a grounding electrode conductor. The raceway is connected on one
end to a panel that has concentric knock-outs. What is the minimum grounding requirement for
this GEC raceway?
It requires a bounding jumper to the GEC at both ends of the raceway
A one family dwelling contains a 200 amp single phase service panel, supplied with a #2/0 THW
conductor. A minimum size bonding jumper for this service is _________.
#6 copper
Which of the following is NOT an approved method of connecting a grounding conductor to a
grounding electrode?
Soldering
Given: A circuit has resistive loads of 4 Ohms, and 20 Ohms connected in parallel. What is the
combined total resistance?
2 Ohms
The largest available conductor for an electrical installation has a resistance of 1.5 Ohms per
1,000 feet. To meet the voltage drop specifications a maximum resistance of the current is .3
Ohms. What is the maximum combined conductor length for this circuit?
200
A sign transformer draws 10 AMPS at 120 volts. It has a 92% power factor. The power
consumed by the secondary circuit is _______ watts.
1104
A formula for determining the maximum available short circuit current (ISCC) available at the
secondary of a transformer when the primary source is assumed to be of unlimited capacity is:
ISCC=100%/Zx% x Is, where Is= full load rating; Xx = rated impedance voltage % of a given
transformer. What is the short circuit ISCC available in the transformer secondary? 75Kva,
240V, 1-phase, impedance=2% ISCC= ____?
15,625 amps
,Given: A 120/208V, 3 phase service is fed with a single size 500KCMil, copper conductor for
each phase. The main circuit breaker is rated at 300 amps. A copper grounding electrode
conductor from the main service pan el to the cold water pipeline must be at least size ______.
1/0 AWG
A motor controller is installed with the expectation that it will be sumerged occasionally for short
periods of time. According to NEC, the controller shall be installed in an enclosure type number.
6
What is the total resistance in this circuit?
6 ohm
A metallic junction box contains six current carrying conductors spliced within the box, two
switches, a current carrying conductor, and two grounding conductors are spliced together. All
conductors are size 12 AWG. What is the minimum volume required for this box?
24.75 cubic inches
Disregarding exceptions: Which of the following statements is true concerning the NEC
requirements for swimming pools?
The bonded structural reinforcing steel of concrete pool shall be permitted as the common
bonding grid
What maximum number of type THHN, size 14 AWG insulated alarm circuit conductors is
allowed in 3/8" flexible metal conduit with fittings inside the conduit?(disregard any grounding
conductors)
3
What is the maximum over current protection permitted for a #14 copper THWN motor control
circuit that is tapped from the load side of the motor short circuit protective device? The
conductors require only short circuit protection and do not extend beyond the motor control
equipment enclosure
100
What is the minimum size copper equipment grounding conductor permitted by Code for
swimming pool lighting permitted under any condition?
, # 12 AWG
When a flexible cord is used to wire a cord and plug connected kitchen waste disposal in a
dwelling unit, the maximum permitted length is ____ inches
36
The frame of an electrical clothes dryer may be grounded by which of the following methods: l-
using a bonding jumper to connect the equipment grounding conductor to the frame II - there
are no grounding requirements for the frame.
I Only
Non-metallic boxes when used with metal conduit require:
Internal bonding means
Under what condition is it permitted by Code to make a splice within the conduit?
Under no condition
Two buildings are served with a single one 240 single phase service. The second building is
served by a 3 conductor feeder. This will require the grounded conductor to be: 1 - identified
with gray insulation, 11 - insulated.
Both I, 11
The outer sheath of coax cable used in a communication system must be grounded at the
buildings premises. It should be grounded close to the cables point of entry into the building.
This grounding is required if the coax is exclusive to accidental contact with conductor carrying
what minimum voltage?
50 volt
If a size 12 AWG copper conductor has a resistance of 1.930 ohms per
1000', what is the total resistance of 350' of the conductor?
.6755 ohms
Given: A ground rod electrode is driven at least 8 feet into the earth. The resistance to earth is
measured 50 ohms. According to the N.E.C. this ground rod electrode
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