HW Test #3

Question 1

the feeder conductor ampacity shall be less than that of the service-entrance conductors where the feeder conductors carry the total load supplied by service conductors with an ampacity of _______ or less

Answer 1

55 A

310.15(b)(6)

Question 2

for other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than _____ VA.

Answer 2

180

Question 3

How many receptacle outlets are permitted on a 20 A, 120 V circuit in a commercial building?

Answer 3

13

Question 4

for show-window lighting, a load of not less than 660 volt-amperes/ linear meter or ____ volt amperes/ linear foot shall be included for show window measured horizontally along its base

Answer 4

200

Question 5

open conductors which are not service entrance cables shall not be installed (above grade) less than which of the following

Answer 5

10 feet below grade level

Question 6

what is the feeder or service calculated load for a waste disposal (940 VA), dishwasher (1250 VA), a trash compactor (1100 VA), and a water heater (4500 VA)?

Answer 6

5843 VA

Question 7

a load demand factor of 75 percent is permitted for _____ or more appliances fastened in place such as waste disposals, dishwashers, trash compactors, water heaters, etc

Answer 7

four or more

Question 8

what is the feeder or service calculated load for a waster disposal (940 VA), dishwasher (1250 VA), and a water heater (4500 VA)?

Answer 8

6690 VA

Question 9

open conductors shall be __________ on glass or porcelain knobs, racks, brackets, or stain insulators

Answer 9

supported

Question 10

open conductors installed outside shall be separated from open conductors of other circuits or systems by not less than ____

Answer 10

4 in

225.14(c)

Question 11

the minimum clearance for overhead feeder conductors not exceeding 600 V that pass over commercial areas subject to truck traffic is ______

Answer 11

18 feet

Question 12

overhead feeder conductors shall have a minimum _____ vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300 volts to ground

Answer 12

12 feet

225

Question 13

conductors are considered outside a buildings when they are buried under not less than

Answer 13

2 “

230.6

Question 14

service conductors installed as unjacketed multiconductor cable shall have a minimum clearance of ______ from windows that are designed to be opened, doors, porches, stairs, fire escapes, or similar locations

Answer 14

3 feet

Question 15

service drops installed over roofs shall have a vertical clearance of ______ above the roof surface, unless a lesser distance is permitted by an exception

Answer 15

8 feet

Question 16

when the service disconnecting means is a power-operated switch or circuit breaker, it shall be able to be opened by hand in the event of a ______

Answer 16

power supply failure

Question 17

the vertical clearance from ground level over a residential driveway for overhead service, conductors not subject to truck traffic and are less than 3000 volts to ground shall be _____-

Answer 17

12 feet

Question 18

where it is impracticable to locate the service head above the point of attachment, the service head location shall be permitted not farther than ______ from the point of attachment

Answer 18

24”

ammendments

Question 19

what is true about installation of a TYPE 1 TVSS

Answer 19

can be connected to line side of a service disconnect

Question 20

ground-fault protection of equipment shall be provided fro solidly grounded WYE electrical services of more than 150 volts-to-ground, but not exceeding 600 V phase-to-phase for each service disconnecting means rated _____

Answer 20

1,000 A

Question 21

a multifamily building has 12 units, the system voltage is 120/240 V, a single-phase. Each 1,500 sq ft unit contains the following:

what is the buildings feeder/ service calculated load for the 4.5 kW dryers?

Answer 21

27.6 kW

dryer less than 5,000 kw, than use 5,000.

Question 22

the maximum voltage drop from service point to the last overcurrent device in a dwelling unit?

Answer 22

4%

Question 23

what is the minimum lateral size service conductor allowed for a dwelling unit

Answer 23

4 copper and (#2 aluminum)

230.31 (B) nyc ammend