Chapter 2 Wiring And Protection

Question 1

A 240 V boat hoist receptacle Hass to be

Answer 1

210.8C

GFI protected

Question 2

Non-dwelling unit receptacles installed in/on the _____ shall be GFI protected

Answer 2

210.8B

Rooftops, outdoors, sinks

Question 3

What is the minimum rating for a laundry circuit in a single-family dwelling

Answer 3

210.11 C2
220.12 J
220.52 B

20 A 1500 W

Question 4

A receptacle on an individual branch circuit can be rated for what percent

Answer 4

210.22

100%

Question 5

Branch circuits_____ Or larger supply only non-lighting loads

Answer 5

210.23D

50 A

Question 6

What type of lampholder shall be connected to a load in excess of 20 A

Answer 6

210.24

Heavy duty

Question 7

The laundry outlet shall be installed within how many feet of the designated appliance location

Answer 7

210.50 C

6 feet

Question 8

Receptacle outlet in the floor shall not be counted as part of the required number of wall receptacle outlets unless located within how many inches of the wall

Answer 8

210.52.A3

18 inches

Question 9

What is the minimum number of small appliance circuits free single-family dwelling

Answer 9

210.52B1

Two circuits

Question 10

Other than countertop appliances what type of device is allowed to utilize the small appliance circuit in a single-family dwelling

Answer 10

210.52B1 and b2

Refrigerator, Clocks, cooking equipment

Question 11

Receptacle outlets show me installed so that no point along the wall line of a kitchen countertop is more than_____ inches measured horizontally from a receptacle outlet in that space

Answer 11

24”

Question 12

What is the minimum length of a countertop in a kitchen that requires the installation of a receptacle

Answer 12

210.52C1

12 inches

Question 13

Island countertops with a minimum dimension of 12 wide by 24 deep must have at least____ receptacle outlets

Answer 13

210.52C2

One

Question 14

18 feet of shell window requires how many receptacles above window

Answer 14

210.62

2

Question 15

What is the maximum distance from a rooftop unit that the rooftop GFI service receptacle shall be located

Answer 15

210.63

25 feet

Question 16

A conference room is 250 ft.² and has 12 1/2 foot wall. How many floor receptacles are needed

Answer 16

322 ft.² or less is one outlet

1

Question 17

Does a vehicle garage door require illumination under the illuminated entryway rule

Answer 17

210.70 A2

Man door
Service door

No

Question 18

General branch circuit lighting load prehospital shall be calculated at_____ watts per square foot

Answer 18

220.12

Two watts per square foot

Question 19

In dwelling units, new additions to the lighting branch circuit shall be calculated in accordance with 220.12 when over_____ Square feet

Answer 19

220.16 A1

500 ft.²

Question 20

Where SE cable enters the building the conduit Has to be

Answer 20

225.27

Sealed


Question 21

The conductors for festoon lighting shall be supported by messenger wire in all spans exceeding

Answer 21

225.6B

40 feet

Question 22

What is the minimum service rating for a single-family dwelling with six or more two wire branch circuits

Answer 22

230.79C

100 A

Question 23

Circuit breakers used as Switches in 120 V fluorescent lighting Shall be marked as

Answer 23

240.83D

SWD, HID

Question 24

What is the minimum height of a SE conductor rated 600 V going above a pedestrian sidewalk

Answer 24

230.24B

15 feet

Question 25

What is the maximum number of disconnects at the main service

Answer 25

230.71A Six disconnects

Question 26

What is the minimum service disconnect of a commercial building

Answer 26

230.79D 60 A

Question 27

What cannot be connected to the supply side of a service disconnect

Answer 27

230.82 1-9

Question 28

When fuses serve as overcurrent protection, a disconnecting means shall be supplied on the line side of all fused circuit that exceed 150 V if the fuses are accessible to who

Answer 28

240. 40  Other than qualified personnel

Question 29

Edison base fuse holders shall be a maximum of what voltage

Answer 29

125 V 240.51 A

Question 30

Eddison base fuses shall not operate at over

Answer 30

240.51 a 30 A 

Question 31

A type S fuse is installed in an Edison base fuse holder for what primary reason

Answer 31

240.53B Non-interchangeable 

Question 32

A grounding electrode conductor may be spliced together by 

Answer 32

250.8 a4 Exothermic welding

Question 33

What is the smallest size grounded conductor you can run in parallel

Answer 33

250.24 c2 1/0

Question 34

The green screw in a main panel enclosure serves as what

Answer 34

250.28B Main bonding jumper

Question 35

High impedance ground systems operate at a minimum of what voltage

Answer 35

250.36 480 V

Question 36

A concrete encased electrode with electrically conductive coated steel reinforcing bars shall be at least____ In diameter in a minimum of 20 feet and continuous length 

Answer 36

250.52 a31 Half inch

Question 37

What is the minimum size wire for a grounding ring

Answer 37

250.52a4 Number 2 copper

Question 38

How many feet of a rod electrode shall be in contact with the earth

Answer 38

250.53G 8 feet

Question 39

A ground rod shall be at least how many inches in diameter

Answer 39

250.52. 5B 5/8 of an inch

Question 40

What is the minimum space between ground rods

Answer 40

250.53B 6 feet

Question 41

 What size grounding electrode conductor must always be protected from physical damage

Answer 41

250.64B Number six or larger

Question 42

When a metal enclosure is required to protect the grounding electrode conductor, the enclosure Has to be bonded to what at both ends

Answer 42

250.64E Grounding electrode conductor

Question 43

What is the minimum size mean bonding jumper for it in 800 Kcmill service entrance conductors

Answer 43

250.102.C1 2/0 

Question 44

What is the minimum size copper clad grounding electrode conductor needed for a 200 amp single phase dwelling copper feeder

Answer 44

310.15 B7 250.66 83% rule 2 awg

Question 45

A fuse shall have a clearing time of

Answer 45

240.67 .07 seconds or less

Question 46

Feeders can supply separate buildings/panels load side Services can be installed underground 225.30

Answer 46