Overcurrent protection - Study guides, Class notes & Summaries
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NETA III 2024 QUESTIONS WITH CORRECT SOLUTIONS
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NETA III 2024 QUESTIONS WITH 
CORRECT SOLUTIONS 
The alternate source for emergency systems are required to be equipped with ground-fault 
protection of equipment. -Answer-False 
Which ANSI/IEEE standard covers SF6 circuit breakers? -Answer-C37.04 
You measure the winding resistance of a 12.4kV, 1000kVA, Delta-Delta connected transformer 
with a 100A test set. H1-H2 measures 42.0 microhms, H2-H3 measures 41.9 microhms, and H3- 
H1 measures 84.0 microhms. What can you conclude from these readings...
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Transformers Level II Lesson 4: Understanding Transformer Overcurrent Protection (22 Questions; Third Year)
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The National Electrical Code® (NEC) requirements found in Section 450.3 are for the protection of ? . - Answer-The windings of the transformer only 
 
Where primary-only protection for transformers is provided with rated currents of nine amperes or more, the basic rule requires that each transformer rated 1,000 volts, nominal, or less be protected by an individual overcurrent protective device on the primary side, rated or set at not more than ? of the rated transformer primary current. - Answe...
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ELECTRICAL LEVEL 3 MODULE 1 LOAD CALCULATIONS AND BRANCH FEEDER CIRCUITS
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According to the NEC®, the ampacity of branch circuit conductors must be derated when there are more than how many current-carrying conductors in a raceway? - correct answer 3 
 
Air conditioning overcurrent protective devices can never exceed what percentage of the motor-rated load current or the branch circuit selection current (whichever is greater)? - correct answer 225% 
 
Conductors must be derated when installed in conduit - correct answer on or above rooftops 
 
Continuous loads are cal...
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Fire Investigator - Master For TCFP Test Questions and Answers (Test Bank) Complete Solution 100% Verified
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Fire Investigator - Master For TCFP Test Questions and Answers (Test Bank) Complete Solution 100% Verified 
Is NFPA 921 a guide or a standard? 
It is the Guide for Fire and Explosion Investigations 
What are the six steps of the scientific method? 
Recognize the need 
Define the problem 
Collect the data 
Analyze the data 
Develop a hypothesis 
Test the hypothesis 
What step of the scientific method is inductive reasoning? 
Analyze the data 
What step of the scientific method is deductive reason...
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NEC Exam prep questions and answers, graded A+ / APPROVED EXAM PREDICTION PAPER/
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NEC Exam prep questions and answers, 
graded A+ 
There are six conductors in a raceway connected to 75 degree Celsius rated breakers. Each wire has a 70 
amp load using THHN conductors. The minimum size conductors used are #_________AWG. 
A. 4 
B. 6 
C. 8 
D. 10 
A. #4 
60 degree column (110.14(C)) adjust from 90 degree column 
95 x .8 = 76a 
Thermal insulation shall not be installed within __________ inches of recessed fixtures. 
A. 1/2 
B. 3/4 
C. 2 
D. 3 
D. 3 
410.116(B) 
Brainpower 
Read ...
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ABYC Marine Electrical Certification Exam Review Correct 100%
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circuit breaker mean? 
a. The breaker is inexpensive 
b. The breaker will have lots of nuisance trips 
c. The breaker will trip out regardless of conditions 
d. The breaker will only trip at 150% of its rated amperage 
 
b. 8 amps (E-11 Table XII Conductor Ampacity - Flexible Cords) - ANSWER maximum current carrying capacity for an flexible cord of 16 AWG with 2 current carrying conductors inside the engine spaces is 
a. 6 amps 
b. 8 amps 
c. 10 amps 
d. 20 amps 
 
c. only in one direction - ANS...
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26305 Overcurrent Protection Questions and Solutions | Grade A+
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What is Amperes Interrupting Current (AIC)? 
️: Maximum fault current that the breaker will safely interrupt 
What is considered a high-level fault? 
️: 50,000 A or larger 
Equipment must have an interrupting rating of at least 
️: Equal to current that must be interrupted. 
What is a ground fault? 
️: Unintentional grounding of conductors in an electrical system 
For 480V circuits, arc current may be as low as ___ of the available bolted fault current and 
seldom exceed ___ 
️: 38% ,...
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Overcurrent protection Questions and Solutions | Grade A+
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Where are overcurrent devices normally installed in a branch circuit. 
️: Where the conductors recover their supply. 
The branch circuit conductor and overcurrent protective device must be sized for the actual 
non-continuous load plus what percentage of the continuous load. 
️: 125% 
which of the following is true of the voltage rating of a fuse 
️: it can be higher than the circuit voltage but never lower 
when selecting ampere ratings of fuses and circuit breakers the most important co...
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Electrical Level 3 Module 1 Load Calculations and Branch Feeder Circuits Quiz
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Electrical Level 3 Module 1 Load Calculations and Branch Feeder Circuits Quiz_ 2022. 
According to the NEC®, the ampacity of branch circuit conductors must be derated when there are more than how many current-carrying conductors in a raceway? 
 
Air conditioning overcurrent protective devices can never exceed what percentage of the motor-rated load current or the branch circuit selection current (whichever is greater)? 
 
Conductors must be derated when installed in conduit 
 
Continuous load...
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Journeyman Electrician Exam Questions and Answers 2023 Graded A+
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Journeyman Electrician Exam Questions and Answers 2023 Graded A+ 
 
For other than one-and two-family dwellings, when building a new electrical service, at least one (1) 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be located within at LEAST _____ of the electrical service equipment? -ANS>> 50 feet 
 
The ampacity of a conductor is defined by the NEC to be the maximum current, in amperes, a conductor can carry continuously under the conditions of use without exce...
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