Article 230 (5pg 52q)

Question 1

a building or structure shall be supplied by a maximum of _____ service(s), unless specifically permitted otherwise

Answer 1

one

Question 2

additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by _______

Answer 2

special permission

Question 3

additional services shall be permitted for different voltages, frequencies, or phases, or for different uses such as for _______

Answer 3

different rate schedules

Question 4

where a building or structure is supplied by more than one service, a permanent plaque or directory shall be installed at each service disconnect location denoting all other services supplying that building or structure and the area serves by each

Answer 4

TRUE

Question 5

service conductors supplying a building or other structure shall not ______ of another building or other structure

Answer 5

pass through the interior

Question 6

conductors are considered outside a building when they are installed

Answer 6

-under not less than 2 in of concrete beneath a building or structure

-within a building or structure in a raceway encased in not less than a 2 in. thickness of concrete or brick

-installed in a vault that meets the construction requirements of Article 450

Question 7

-conductors other than service conductors shall not be installed in the same

Answer 7

-service raceway
-service cable

Question 8

where a service raceway enters a building or structure from a(n) ________, it shall be sealed in accordance with 300.5(G)

Answer 8

underground distribution system

Question 9

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

Answer 9

3 feet

Question 10

overhead service conductors to a building shall maintain a vertical clearance of final spans above, or within, _______ measured horizontally from the platforms, projections, or surfaces from which they might be reached.

Answer 10

3 feet

Question 11

service conductors shall not be installed beneath openings through which materials may be moved and shall not be installed where they will obstruct entrance to these buildings’ openings

Answer 11

TRUE

Question 12

overhead service conductors spans can be supported to hardwood trees

Answer 12

FALSE

Question 13

service-drop conductors shall have ___________

Answer 13

-sufficient ampacity to carry the load
-adequate mechanical strength

Question 14

the minimum size service-drop conductor permitted is _____ AWG copper or _______ AWG aluminum or copper-clad aluminum

Answer 14

8, 6

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

if a set of 120/240 V service-drop conductors terminates at a through-the-roof raceway or approved support, with less than 6 feet of these conductors passing over the roof overhand, the minimum clearance above the roof for these service conductors shall be _______.

Answer 16

18 inch

Question 17

the requirement to maintain a 3 feet vertical clearance from the edge of a roof does not apply to the final conductor span where the service drop is attached to ______

Answer 17

the side of a building

Question 18

service-drop conductors shall have a minimum of _____ vertical clearance from final grade over residential property and driveways, as well as over commercial areas not subject to truck traffic where the voltage is limited to 300 volts-to-ground

Answer 18

12 feet

Question 19

the minimum clearance for service-drop conductors not exceeding 60V that pass over commercial areas subject to truck traffic is _________

Answer 19

18 feet

Question 20

overhead service-drop conductors shall have a horizontal clearance of ______ from a pool

Answer 20

10 feet

Question 21

the minimum point of a attachment of the service-drop conductors to a building shall not be less than _______ above finished grade

Answer 21

10 feet

Question 22

where raceay-type service masts are used, all raceway fittings shall be _______ for use with service masts.

Answer 22

identified

Question 23

service-lateral conductors shall have_____

Answer 23

-adequate mechanical strength
-sufficient ampacity for the loads calculated

Question 24

underground copper service-lateral conductors shall not be smaller than ______ AWG copper

Answer 24

4

230.31

Question 25

service-lateral conductors that supply power to limited loads of a single branch circuit shall not be smaller than _________

Answer 25

12 AWG copper

Question 26

service-entrance conductors shall be sized not less than _____ percent of the continuous load, plus 100 percent of the noncontinuous load

Answer 26

125

Question 27

writing methods permitted for service-entrance conductors include _____

Answer 27

-rigid metal conduit
-electrical metallic tubing
-PVC conduit

Question 28

underground service conductors shall be protected against physical damage

Answer 28

TRUE

Question 29

service cables, where subject to physical damage, shall be protected by _______

Answer 29

-rigid metal conduit