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DWELLING UNIT CALCULATIONS EXAM FULLY SOLVED -10
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DWELLING UNIT CALCULATIONS EXAM FULLY SOLVED -10
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DWELLING UNIT CALCULATIONS EXAM FULLY SOLVED #10A minimum of _____ 20A small-appliance branch circuit(s) is(are) required for
receptacle outlets in the kitchen, dining room, breakfast room, pantry, and similar areas.
- correct answer 2
Response Feedback: 210.11(C)(1) and 210.52(B)(1)
When sizing the feeder or service, each dwelling unit must have a minimum feeder load
of _____ for the two small-appliance branch circuits. - correct answer 3,000 VA
Response Feedback: 220.52(A)
The NEC doesn't require a separate circuit for the washing machine, but does require a
separate circuit for the laundry room receptacle or receptacles, of which one can be for
the washing machine. - correct answer True
Response Feedback: 210.11(C)(2)
Each dwelling unit must have a feeder load consisting of _____ for the 20A laundry
circuit. - correct answer 1,500 VA
Response Feedback: 220.52(B)
The NEC requires a minimum of 3 VA for each square foot of living space for the
required general lighting and general-use receptacles for dwelling units. The dimensions
for determining the area are computed from the outside of the building and don't include
_____. - correct answer Open porches, garages, and spaces not adaptable for future
use
Response Feedback: 220.12
The 3 VA for each square foot of living space for general lighting includes receptacles
rated 15A and/or 20A, but not the small-appliance or laundry circuit receptacles. -
correct answer True
Response Feedback: 220.12 and 220.14(J)
What's the general lighting load and general-use receptacle load for a 2,100 sq ft home
that has 74 receptacle outlets and nine recessed luminaires rated at 100 W each? -
correct answer 6,300 VA
Response Feedback: (2,100 sq ft @ 3 VA) No additional load is required for general use
receptacles and lighting outlets [Table 220.12, Note a].
, The NEC recognizes that the general lighting and receptacles, and small-appliance and
laundry circuits won't all be on or loaded at the same time and permits a(n) _____ to be
applied to the total of these loads. (Use the correct code terminology) - correct answer
Demand Factor
Response Feedback: [Article 100, 220.42, and Table 220.42]
What's the general lighting load for a 2,700 sq ft dwelling unit? - correct answer 8,100
VA
Response Feedback: [220.12]
2,700 sq ft @ 3 VA = 8,100 VA
What's the total connected load before demand factors for general lighting and
receptacles, small-appliance, and laundry circuits for a 6,540 sq ft dwelling unit? (Note:
This is asking for total connected load, not the demand load. This calculation is the
calculated load before we apply the demand factors of Table 220.42) - correct answer
24,120 VA
Response Feedback: 220.14(J) and 220.52]
General Lighting and Receptacles:6,540 sq ft x 3 VA 19,620 VA
Small-Appliance Circuits: 1,500 VA x 2 3,000 VA
Laundry Circuit: 1,500 VA x 1 1,500 VA
Total Connected Load 24,120 VA
Because the air-conditioning and heating loads aren't on at the same time they're called
"noncoincidental," and it's permissible to omit the smaller of the two loads. - correct
answer True
Response Feedback: 220.60
A load demand factor of 75 percent is permitted for _____ or more appliances fastened
in place such as waste disposers, dishwashers, trash compactors, water heaters, and
so forth. - correct answer Four
Response Feedback: 220.53
What's the feeder or service demand load for a waste disposer (940 VA), dishwasher
(1,250 VA), and a water heater (4,500W)? - correct answer 6,690 VA
Response Feedback:
Waste Disposer 940 VA
Dishwasher 1,250 VA
Water Heater 4,500 VA6,690 VA
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