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Branch Service Feeder And Load Calculations – Questions & Proper Answers
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Branch Service Feeder And Load Calculations –Questions & Proper Answers
The requirements for calculating certain loads are found in Article 220 of the
National Electrical Code. Which of the following load calculations are covered
in this article?
A. Branch-circuit loads
B. Feeder loads
C. Service loads
All of the above Right Ans - D
When calculating branch-circuit. feeder or service loads. vou should round the
calculation to the nearest whole ampere. What voltage should be used when
calculating for those loads?
A. Whatever voltage is specified
B. 120, 120/240, 208/120 or 240
C. 347, 480 Y/277, 480 600/347 or 600
D. All of the above Right Ans - D
Which dimensions should be used to calculate the floor area of a building?
A. Inside dimensions
B. Outside dimensions
C. Either A or B
D. Neither A nor B Right Ans - B
At what HP can a motor be connected to a lighting circuit and still be
considered a
"general lighting load"?
A. 1/8 HP
B. 1/4 HP
C. 1/2 HP
D. 1 HP Right Ans - A
General use receptacles and outlets NOT for general illumination in all
occupancies
should be calculated according to Article 220.14 of the National Electrical
Code. What are the loads that are shown there based on?
A. Nominal feeder voltages
, B. Nominal branch -circuit voltages
C. Either A or B
D. Neither A nor B Right Ans - B
There are requirements for loads related to adding a structural addition onto
an existing dwelling unit. Where will you find the requirements for such an
occurrence in the National Electrical Code?
220.12
B. 220.14
ΠBoth A and B
D Neither A nor B Right Ans - B
The rating of a branch circuit will determine the total load, the maximum of
which will not
be exceeded.
A True
B. False Right Ans - A
The sum of the loads on branch circuits being supplied will determine the
calculated load
or a leecer or service
A. True
B. False Right Ans - A
The demand factors for general lighting should be applied to the total branch-
circuit load
that will be calculated for general illumination. Will the demand factors also
be considered when determining the number of branch circuits tor aenera
illumination?
A. Yes
B. No Right Ans - B
The load for show-window lighting should be a minimum of 200 volt-
amperes/linear foot.
How should that be measured?
A. Horizontally along all sides of the window
B. Horizontally along the base of the window
C. Either A or B
D. Neither A nor B Right Ans - B
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