Chapter 2 Wiring And Protection Flashcards
A 240 V boat hoist receptacle Hass to be
210.8C
GFI protected
Non-dwelling unit receptacles installed in/on the _____ shall be GFI protected
210.8B
Rooftops, outdoors, sinks
What is the minimum rating for a laundry circuit in a single-family dwelling
210.11 C2
220.12 J
220.52 B
20 A 1500 W
A receptacle on an individual branch circuit can be rated for what percent
210.22
100%
Branch circuits_____ Or larger supply only non-lighting loads
210.23D
50 A
What type of lampholder shall be connected to a load in excess of 20 A
210.24
Heavy duty
The laundry outlet shall be installed within how many feet of the designated appliance location
210.50 C
6 feet
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
210.52.A3
18 inches
What is the minimum number of small appliance circuits free single-family dwelling
210.52B1
Two circuits
Other than countertop appliances what type of device is allowed to utilize the small appliance circuit in a single-family dwelling
210.52B1 and b2
Refrigerator, Clocks, cooking equipment
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
24”
What is the minimum length of a countertop in a kitchen that requires the installation of a receptacle
210.52C1
12 inches
Island countertops with a minimum dimension of 12 wide by 24 deep must have at least____ receptacle outlets
210.52C2
One
18 feet of shell window requires how many receptacles above window
210.62
2
What is the maximum distance from a rooftop unit that the rooftop GFI service receptacle shall be located
210.63
25 feet
A conference room is 250 ft.² and has 12 1/2 foot wall. How many floor receptacles are needed
322 ft.² or less is one outlet
1
Does a vehicle garage door require illumination under the illuminated entryway rule
210.70 A2
Man door
Service door
No
General branch circuit lighting load prehospital shall be calculated at_____ watts per square foot
220.12
Two watts per square foot
In dwelling units, new additions to the lighting branch circuit shall be calculated in accordance with 220.12 when over_____ Square feet
220.16 A1
500 ft.²
Where SE cable enters the building the conduit Has to be
225.27
Sealed

The conductors for festoon lighting shall be supported by messenger wire in all spans exceeding
225.6B
40 feet
What is the minimum service rating for a single-family dwelling with six or more two wire branch circuits
230.79C
100 A
Circuit breakers used as Switches in 120 V fluorescent lighting Shall be marked as
240.83D
SWD, HID
What is the minimum height of a SE conductor rated 600 V going above a pedestrian sidewalk
230.24B
15 feet
What is the maximum number of disconnects at the main service
230.71A
Six disconnects
What is the minimum service disconnect of a commercial building
230.79D
60 A
What cannot be connected to the supply side of a service disconnect
230.82 1-9
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
- 40

Other than qualified personnel
Edison base fuse holders shall be a maximum of what voltage
125 V
240.51 A
Eddison base fuses shall not operate at over
240.51 a
30 A

A type S fuse is installed in an Edison base fuse holder for what primary reason
240.53B
Non-interchangeable

A grounding electrode conductor may be spliced together by

250.8 a4
Exothermic welding
What is the smallest size grounded conductor you can run in parallel
250.24 c2
1/0
The green screw in a main panel enclosure serves as what
250.28B
Main bonding jumper
High impedance ground systems operate at a minimum of what voltage
250.36
480 V
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 
250.52 a31
Half inch
What is the minimum size wire for a grounding ring
250.52a4
Number 2 copper
How many feet of a rod electrode shall be in contact with the earth
250.53G
8 feet
A ground rod shall be at least how many inches in diameter
250.52. 5B
5/8 of an inch
What is the minimum space between ground rods
250.53B
6 feet
 What size grounding electrode conductor must always be protected from physical damage
250.64B
Number six or larger
When a metal enclosure is required to protect the grounding electrode conductor, the enclosure Has to be bonded to what at both ends
250.64E
Grounding electrode conductor
What is the minimum size mean bonding jumper for it in 800 Kcmill service entrance conductors
250.102.C1
2/0

What is the minimum size copper clad grounding electrode conductor needed for a 200 amp single phase dwelling copper feeder
310.15 B7
250.66
83% rule
2 awg
A fuse shall have a clearing time of
240.67
.07 seconds or less
Feeders can supply separate buildings/panels load side
Services can be installed underground
225.30

