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Load calculation Feeders and services Level 4 Module 1 Questions With Complete Solutions
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Load calculation Feeders and services Level 4 Module 1 Questions With Complete Solutions
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Load calculation Feeders and services Level 4 Module 1Questions With Complete Solutions
What is the demand factor allowed by the NEC® for calculating
the neutral conductor size for electric range load? Correct
hh
Answers 70%
hh
Using the VA/linear foot method, the total VA that must be used
in a service calculation for a 50' show window is Correct
hh
Answers 12,500VA
hh
Before it is considered a continuous load, a load must operate
for at least how many hours without interruption? Correcthh
Answers 3 hh
Which of the following factors does not affect conductor
ampacity adjustments? Correct Answers Number of phase
hh hh
If a continuous connected load totals 120A, what is the
minimum current-carrying capacity required for the feeder?
Correct Answers 150A
hh hh
What is the load center length for a tapped feeder with loads of
120A at 50', 110A at 60', 75A at 90', and 70A at 150'? Correcthh
Answers 79.60
hh
Which of the following lighting loads would be used in a
residence that is 1,650 sq ft? Correct Answers 4,950VA
hh hh
What is the load for 40 non-dwelling unit receptacles? (Assume
that the load is not continuous.) Correct Answers 7,200VA
hh hh
, The minimum service rating for a residential service is Correct hh
Answers 100A
hh
Residential small appliance circuit must be rated at Correct
hh
Answers 1,500VA
hh
Use of the 100' tap rule is limited to installation in high-bay
manufacturing buildings with wall heignt over Correct Answers
hh
35 feet
hh
Which part of a residential lighting and small appliance load
must be rated at 35% for service calculations? Correct Answers
hh
The next 177,000VA
hh
If a store lighting load is 14,000VA (continuous), which of the
following must be used for the circuit calculation? Correct
hh
Answers 17,500VA
hh
In most cases, feeder conductor size is adjusted when Correct
hh
Answers there are more than three current-carrying conductors
hh
in the raceway
When calculating the service requirement for a particular
building, the step is to Correct Answers determine the floor
hh hh
area of the building
What is the feeder ampacity for a three-phase, 120/208V
subpanel with a connected load of 84,563VA? Correct Answers
hh
235A
hh
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