EEP Unit 9
What's the feeder or service demand load for a disposal (waste) (940 VA), a dishwasher (1,250 VA), a trash compactor (1,100 VA), and a water heater (4,500 W)?
5,843 VA
What size single-phase, 3-wire feeder and neutral conductor is required for a 110A service of which 36A consist of 240V loads, with terminals rated 75°C?
Two 3 AWG and one 4 AWG
What's the feeder or service demand load for one 6 kW and two 3 kW cooking appliances?
9.30 kW
Each dwelling unit must have a load of _____ for the 20A laundry circuit.
1,500 VA
What's the feeder or service demand load for a dwelling unit containing a heat-pump motor-compressor of 17A at 240V with 6 kW of supplemental space electric heating 240V? The air conditioner motor-compressor is the largest motor-type load in the dwelling unit.
11.10 kVA
If the total demand load is 30 kVA for a 120/240V dwelling unit, what's the copper conductor size?
2 AWG
What size service conductors are required if the demand load for a dwelling unit equals 120A, the service disconnect is rated 125A?
2 AWG
Using the optional method, what size 120/240V single-phase aluminum service conductor is required for a 3,000 sq ft dwelling unit containing a 900 sq ft porch and a 400 sq ft carport (not a garage) with the following loads? Dishwasher, 1.50 kWDisposal (Waste), 1 kVATrash Compactor, 1.50 kVAHot Tub, 40A at 240VRV Outlet, 50A at 240VAir-Conditioning Heat-Pump, Two Units, each at 21A, 240VRadiant Heating 50A at 240V with six separately controlled units
2/0 AWG AL
What's the feeder or service demand load for two 3 kW cooking appliances?
4.50 kW
Where there are no adjustment or correction factors required, the feeder conductors for a rated service of between 100A and _____ supplying the entire load associated with an individual dwelling unit, may be sized applying Table 310.12.
400 A
What's the dwelling unit service neutral load for one 9 kW range?
5.60 kW
The feeder or service neutral load for household cooking appliances, such as electric ranges, wall-mounted ovens, or counter-mounted cooking units, is permitted to be calculated at _____ percent of the load as determined by 220.55.
70
The service neutral load for household electric clothes dryers is permitted to be calculated at _____ percent of the load as determined by 220.54.
70
What's the feeder or service demand load for a dwelling unit with a 28A, 240V air conditioner motor-compressor versus 8 kW of space electric heating at 240V? The air conditioner motor-compressor isn't the largest motor-type load in the dwelling unit.
8 kW
What's the feeder or service demand load for an 11.50 kW range?
8 kW
What's the total connected load for lighting and general-use receptacles for a 2,700 sq ft dwelling unit?
8,100 VA
What's the service demand load for a 14 kW range?
8.8 kW
What's the feeder or service demand load for a 13.60 kW range?
8.80 KW
When sizing the feeder or service conductor according to the optional method we must:
All of these 1. Determine the total connected load of the general lighting and general-use receptacles, small-appliance and laundry branch circuits, and the nameplate VA rating of all fixed appliances and motors. 2. Determine the demand load by applying the following demand factors to the total connected load: the first 10 kVA at 100 percent, and the remainder at 40 percent. 3. Determine the larger of air-conditioning versus heat demand load.
The NEC recognizes that the general lighting and general-use receptacles, and the small-appliance and laundry circuits won't all be on or loaded at the same time and permits a(an) _____ to be applied to the total of these loads.
Demand Factor
The feeder or service demand load for electric clothes dryers located in dwelling units must not be less than _____.
The larger of 5,000W or the nameplate rating
How many 15A or 20A, 120V circuits are required for the general lighting and general-use receptacles for a dwelling having a floor area of 2,400 sq ft, exclusive of an unfinished basement not adaptable for future use?
Three 20 A or four 15 A circuits
Because the air-conditioning and space electric 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.
True
The 3 VA for each square foot of living space for general lighting includes receptacles rated 15A and 20A, but not the small-appliance or laundry circuit receptacles.
True
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.
True
