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26111-20 Flashcards | StudBud
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26111-20
26111-20
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Residential Wiring
Flashcards
30 cards
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Questions
30
Answers
1
. Dusk-to-dawn lighting is typically controlled using a _____.
photoelectric switch
dimmer switch
three-way switch
remote relay
2
When sizing conductors used to serve electric heat, branch circuit conductors must be sized at _____.
125%
80%
100%
200%
3
Bends in Type NM cable must NOT exceed _____.
five times the cable diameter
seven times the cable diameter
eight times the cable diameter
360o
4
Which of the following must NEVER be used as a grounding electrode?
a ground ring
a metal underground water pipe in direct contact with the earth for 10'
a metal in-ground support structure
a metal underground gas piping system
5
The equipment grounding conductor is attached to the _____.
black screw
green screw
brass screw
silver screw
6
An example of a location in a dwelling where a receptacle must have GFCI protection is a(n) _____.
Door Bell
living room
attic
garage
7
The NEC® article that covers the installation of hot tubs is _____.
NEC Article 505
NEC Article 480
NEC Article 310
NEC Article 680
8
The conductors that extend from the panelboard to various outlets are called _____
service-entrance conductors
mains
branch circuits
grounding electrode conductors
9
FMC may be used as equipment grounding conductor if the circuit conductors are protected by overcurrent devices rated @
50A or less
20A or less
30A or less
40A or less
10
The NEC® article that provides the rules for demand factors is _____
NEC Article 230
NEC Article 200
NEC Article 220
NEC Article 250
11
A GFCI sensor will trip when the _____
current is less than the value established for a Class A device
current in the neutral load is less than the current in the hot load
when device is old
as soon as you turn it on
12
Applying the correct demand factors, the net general lighting load for the residence in the figure provided is _____.
3,000V
2,820V
3,210VA
3,640VA
13
The NEC allows the load calculation for grounded neutral conductor supplying electric ranges to have a demand factor of
1.25%
70%
100%
25%
14
What is the square footage of living space of the home provided in the figure below?
1,100 ft2
950 ft2
700 ft2
1,200 ft2
15
Power to the entire residence is shut off at the main service disconnect located _____.
at the service drop
in the basement or unfinished crawlspace
at the main branch circuit
at the panelboard
16
To control a device from three locations, a four-way switch must be used with _____
three three-way switches
one three-way switch
four three-way switches
two three-way switches
17
A feeder can be used to supply _____
a subpanel from the main service panel
the service drop to the main panelboard
a branch circuit from a circuit breaker
the main panel and duplex receptacles
18
The requirements for switch locations in dwelling units can be found in _____.
NEC Article 240
NEC Article 250
NEC Article 200
NEC Article 210
19
Ceiling fan boxes must be marked with the maximum weight to be supported when they are rated to support more than _____
35 lbs
25 lbs
15 lbs
20 lbs
20
In residential construction, conduit is MOST likely to be used where conductors are _____.
run in wall
embedded in concrete
run behind kitchen countertops
installed in finished basements
21
The main bonding jumper is located at the _____.
ground rod or other grounding system
last outlet in the branch circuit
service disconnect
meter enclosure
22
A residence has conductors installed under a 2" slab. According to NEC Section 230.6 these conductors are considered ?
underground
safe
hard to get too
outside the house, and no disconnect is required at the meter base
23
Type NM cable is also known as _____.
Ethernet
Armored cable
Romex
Service cable
24
A type of cable with a corrugated sheath that has a maximum bend radius of seven times the cable diameter is _____.
the main panel and duplex receptacles
a subpanel from the main service panel
a branch circuit from a circuit breaker
the service drop to the main panelboard
25
When the voltage is limited to 300V to ground, the minimum clearance over a residential driveway is reduced to _
20 FT
6 FT
10 FT
12 Ft
26
In a panelboard, the black circuit conductor in a lighting circuit is connected to a(n) _____
bonding jumper
overcurrent protection device
neutral bus
grounding bus
27
A grounding electrode conductor must be made of _____.
aluminum only
titanium or steel
steel plate
copper or aluminum
28
The NEC® article that lists the requirements for installing a service disconnect is _____.
NEC Article 230
NEC Article 100
NEC Article 210
NEC Article 200
29
The NEC® article that covers equipment grounding and equipment grounding conductors is _____.
NEC Article 100
NEC Article 210
NEC Article 250
NEC Article 220
30
The NEC® general lighting load for the home in the figure provided is _____.
2,400VA
3,600 OHMS
2,800VA
3,600VA
