Elect Code Calc Lvl II
What are the minimum size Type THWN copper circuit conductors permitted to supply a 6 1/4 kW, 120/240-volt, single-phase, 3-wire electric household dryer installed in a one-family dwelling unit?
10 AWG
What is the minimum size Type NM nonmetallic sheathed cable using copper branch-circuit conductors to supply a 50-gallon storage-type water heater? The water heater is rated 240 volts AC, single-phase. It has two non-simultaneously operated upper and lower heating elements rated 4,250-watts.
10-2NM
The minimum size neutral conductor permitted for a household wall-mounted oven, electric range, or cooking unit rated 83/4 kW or larger is ? . a. 8 AWG b. 10 AWG c. 12 AWG d. 14 AWG
10AWG, 210.19(A)(3) Exception No. 2
What is the ungrounded conductor feeder demand for two 10 kW household ranges in a dwelling unit?
11,000VA
What is the ungrounded conductor feeder demand for two 14 kW household electric ranges installed in a dwelling unit?
12,100VA
An individual branch circuit supplies a household kitchen waste disposer with a motor nameplate rating of 1/2 horsepower, 120 volts, and 5.6 amperes. The disposer is equipped with manual-reset type overload protection. The disposer instructions indicate the electrical installation should follow the NEC. What is the minimum branch circuit conductor size required when using Type NM copper cable to supply the disposer?
14-2 NM
What is the ungrounded conductor feeder demand for household electric ranges installed in a four-unit multifamily dwelling when the ranges are rated 8.8 kW, 9 kW, 10 kW, and 12 kW?
17,000VA
One 10 kW range, one 15 kW range, and one 24 kW range are to be installed in a multifamily dwelling. What is the feeder demand for the three household ranges for the ungrounded conductors only?
17,500
Five 10 kW electric household ranges are to be installed in the culinary arts lab in a high school for instruction cooking classes. What is the feeder demand for the ranges?
20,000
When a household wall-mounted oven is tapped from a 50-ampere branch circuit, the ampacity of the tap conductors shall not be less than ? . a. 20 A b. 25 A c. 30 A d. 35 A
20A , 210.19(A)(3) Exception No. 1
Based on single-phase feeders for household range loads rated in volt-amperes for the ungrounded conductors of a single-phase system, identify the Code compliant minimum rating in volt-amperes for the grounded conductor of each feeder.
2520, 3150, 12,250
Two 15 kW, 120/240-volt electric commercial ranges are to be installed in a cafe. Determine the feeder demand supplying the ranges
30,000
What is the branch-circuit demand load for a 2 1/2 kW household cooktop and a 2 kW household oven for a dwelling unit (based on the ungrounded conductors of a single-phase, 3-wire feeder)?
3600
A 12-unit apartment complex has a 12 kW household range and a 3 kW household oven in each unit. What is the feeder demand for the ranges and ovens in the complex?
39,000
Calculate the volt-ampere range feeder demand for a 24-unit apartment complex with a 10 kW household range in each apartment when the supply system is 120/240-volt, single-phase.
39,000
Calculate the following for a single 13.4 kW household range located in a dwelling unit using THWN copper conductors for a 120/240-volt branch circuit. Determine the minimum required ampacity for the branch-circuit conductors supplying the range
40
The minimum branch-circuit rating for a household range rated 83/4 kW shall not be less than ? . a. 35 A b. 40 A c. 45 A d. 50 A
40 A, NEC: 210.19(A)(3)
A 30-unit apartment complex has a 10 kW household range in each apartment. What is the feeder demand for the ranges?
45,000
What is the feeder demand for three 12 kW commercial ranges, one 150-gallon 25 kW water heater, one 2,500-watt booster heater, and three 2,000-watt warming ovens to be installed in a restaurant?
45,175
What is the minimum ungrounded conductor(s) feeder demand for two 3 kW household electric ovens in a dwelling unit?
4500
Based on single-phase feeders for household range loads rated in volt-amperes (VA) for the ungrounded conductors of a single-phase system, identify the Code compliant minimum rating in volt-amperes for the grounded conductor of each feeder.
5600, 7700, 8470, 11,900
An apartment complex has a 12 kW range in each of its 44 apartments. What is the feeder demand for the household ranges?
58,000
One 10 kW household range is to be installed in each of 36 apartments supplied by a 120/208-volt, 3-phase service. The ranges are equally divided on the three phases. Determine the feeder demand.
58,500
What is the minimum required size THHN copper branch-circuit conductors permitted for a single 15 kW, 208-volt, 3-phase electric in-duct heater installed in a bank with a nameplate full-load current of 42 amperes? Assume all equipment is listed at 75°C.
6 AWG
The neutral feeder demand for household electric ranges is permitted to be ? of the feeder demand for the ungrounded conductors. a. 50% b. 70% c. 90% d. 100%
70%, 220.61(B)
What is the ungrounded conductor feeder demand for one 10 kW household range installed in a dwelling unit?
8000VA
