test 1
the cross secrional area of a 4awg thhe/thwn copper condutor is square inches
.0824
where a branch circuit is rated at 20 amps the smallest circuit conductors that be installed are awg copper
10
generally nec definitions are located in artcle
100
the circular mil area of a 10 awg bare copper conductor is cmils
10380
chapter 1 in the nec contains articles 100
110
where a branch circuit is protected with a 20 amp fuses the smallest circuit conductors that can be installed are awg copper
12
where a branch circuit is rated at 20 amps the smallest circuit conductors that can be installed are awg
12
ignoring the effects of voltage drop a 20 ampere branch circuit requires conductors
12 awg copper
branch ciruitts that serve a are reqired to be rated at 20 amperes where installed in a house
123
receptacles that are located in can be connected to a small appliance branch circuit in a house
123
which of the following actual readings would be considered to be considered to be nominal 240 volts
123
refer to article 100 definition for continuous load in the nec according to 210.19 and 210.20a times the current drawn by the load
125
refer to article 100 definition for continuous load in the nec according to 210.19 the branch circit conductors for a continuous load shall be sized at not less than times the current drawn by the load
125
refer to article 100 definition for continuous load in the nec according to 210.19 the minmum branch circuit conductor size before the applicatin of any adjustment or correction fators shall have an allowable ampacity equal to or greater than the noncontinuous load plus percent of the continuous load
125
refer to the article 100 definition for continuous load in the nec according 210.20a the over current protection for a continuous load shall be sized at not less than of the current drawn by the load
125
which of the following actual readings would be considered to be considered to be nominal 120 volts
125 114
which of the following actual readings would be considered to be considered to be nominal 120 volts
128 110
if a wire 375 feet long has 500 ohms of resistance what is the resistance of 10oo feet of the same wire
1333 ohms
where a branch circuit is protected with a 15 amp circuit breaker the smallest circuit conductors that can be install are awg copper
14
where 10 awg thhn thwn copper circuit conductors are connected to 20 amp circuit breaker the circuit is considered to be a amp branch circuit
15
where 12 awg thhn thwn copper circuit conductors are connected to 20 amp circuit breaker the circuit is considered to be a amp branch circuit
15
3 hours 20 minutes -1 48 minutes
1hr 32min
what is minimum number of 20 ampere branch circuits for small appliances required in a residence
2
the nec requires one separate ampere receptacle branch circuit for bathroom receptacles because cord connected appliances used in residential bathrooms such as curling irons and hair dryers use a lot of current
20
the nec requires two separate ampere receptacle branch circuits for kitchens because cord connected appliances used in residental
20
where 10 awg thhn thwn copper circuit conductors are connected to 20 amp circuit breaker the circuit is considered to be a amp branch circuit
20
which of the following actual readings would be considered to be considered to be nominal 208 volts
206
section of the nec states that a refrigerator may be supplied by a separate 15 amp circuit
210.52 b 1 exception 2
where 6 awg thhn thwn copper circuit conductors are connected to 25 amp circuit breaker the circuit is considered to be a amp branch circuit
25
which of the following actual readings would be considered to be considered to be nominal 240 volts
250 233
3 hours 20 minutes +1 48 minutes
308
the code reference for gfci protetion of receptacles in commercial garages is found at
511.12
for a single family dwelling with a total of 3500 square feet of occupied area the minimum number of 15 ampere lighting branch circuits is
6
you timed your helper and it took him 2 1/2 hours to dig a trench 20 feet long. if you get another helper who will work at the same pace how much time will it take both of them to big an additional 100 feet
6 hours 15 minutes
the of a conductor must not be less than the rating of the over current device protecting theconductor
ampacity
circuits that have a nominal voltage rating of 120 volts may have an actual operating voltage of
any of these
in construction of commercial and industrial the quantity and rating of electrical circuital circuits is usually designed by the
architect
point z is
arrow
article 210applies to branch circuit calculations for the purpose of determining the size of a service or feeder are covered in
article 220
how is wire diameter expression the awg standard
as a whole number
in a dwelling such as your house how many 20 branch circuits are required by the nec to supply power to an area where a clothes washing machie is to be plugged into a receptacle
at least one
how many 20 amp small appliance branch circuits are reqired by the nec to supply power to receptacles in dwelling kitchens such as in your house
at least two
wire sizes 4/0 and smaller are expressed in
awg
residential boat hoist motor is required to be gfci protected
both 1 2
nominal voltage includes a range of actual circuit voltages that are the nominal voltage
both a and b
the nec considers installation under a covered walk way or canopy to be a location
damp
when calculating loads to determine the size of a 120/240 volt 1 3 wire service the lighting load in amps is calculated by the lighting load in volt amps by 240 volts
dividing
the nec require at two 20 amp small appliance branch circuits to supply power to counter top receptacles in kitchen of a house
does
the nec require at least two 20 amp small appliance branch circuits to supply power to counter top receptacles in commercial resaurant kitchens such as dair queen
does not
the nec considers an installation inside a building to be a location
dry
in construction of one and two family dwellings the quantity and rating of electrical circuits is usually designed by the
electrician
which if these trade size 1/2 inch raceways has the the smallest inside diameter refer to the appropriate table among those shown in nec chapter 9 table 4
eletrical nonmetallic tubing
the NEC definition for is electrically connected to or is a source of voltage
energized
all 120 volt 15 or 20 ampere receptacles in unfinished basements in homes must have
gfci protection
although the nec contains many exceptions in general the ampacity of the branch circuit conductors protective dev must have an ampacity that is or equal to the rating of the ocpd
greater than
gfci is an abbreviation stands for
ground fault circuit interrupter
point x is
hook
wire sizes up through 4/0 are expressed in American wire gauge awg wire sizes larger than 4/0 awg are expressed in
kcmil
although the nec contains many exceptions in general the rating of the branch circuit conductors protective device must have a rating that is or equal to the ampacity of the brsnch circuit conductors connected to it
less than
the diameter of wire is usually provided in a unit of measurement called a
mil
nec stands for
national electrical code
nfpa stands for
national fire protection association
the code reqires which of the following residential to be gfci protected
neither 1 2
branch circuits that serve a are required to be rated at 20 amperes where installed in a school
neither 123
are at least two 20 amp small appliance branch circuits to supply power to counter top receptacles in commercial restaurant kitchens such as dairy queen
no
in a dwelling does the nec permit the circuit installed to a washing machine receptacle to also be connected to the light over the washing machine
no
how many 20 amp small appliance branch circuits are required by the nec to supply power to countertops in commercial restaurant kitchens such as pappa bar b que
none are required
the to9tal number of electrician working for one electrica company is 123. another electcal company has 40 fewer electricaians how many electricians work for the second company
none of there
where 4 awg thhn thwn copper circuit conductors are connected to 30 amp circuit breaker the circuit is considered to be a amp branch circuit
none of there
point w is
rim notntch
point y is
star
branch circuits are rated rated according to
the ampere rating of the overcurrent device
the nec defines a branch circuit as
the circuit conductors between the
the definition of s branch circuit is
the circuit conductors between the final over current device protecting the circuit and the outlet
when calculating loads to determine the size of aservice the lighting load in volt amps is calculated by multiplying the floor area times the value shown in table 220.12 of the nec
true
when circuit conductors larger than the minimum required by the nec are installed the rating of a branch circuit is
unchanged
according to nec section 240.4b if the ampacity of a conductor does not match up with a standard fuse rating what are you allowed to do
use the next higher standard rating
if the apacity of a conductor does not match up with a standard circuit breaker size you are allowed to according to section 240.4 b in the nec
use the next higher standard size breaker
the nec considers an installation underground to be location
wet
are at least tow 20 amp small appliance branch circuits required by the nec to supply power to counter top receptacles in residential kitchens
yes
does the nec permit a 120 volt receptacle for a gas range to be connected to a small appliance branch
yes
figure 108.016 shown above is a residential kitchen a refrigerator will be installed in this residential kitchen and will be located in front of and connected to receptacle 11 does the nec permit receptacle 11 to be connected to a circuit that is not a small appliance branch circuit
yes
refer to figure 108.014 this kitchen is in a house and receptacle 8 is used for gas range control power. does the nec permit receptacle 8 to be connected to one of the 20 amp small appliance branch circuits
yes
refer to figure 108.014 this kitchen is in a house. does the nec permit receptacle 11 to be connected to a circuit that is not one of the 20 amp small appliance branch circuits
yes
refer to figure 108.014 this kitchen is in a house. does the nec permit receptacle 11 to be connected to one of the 20 amp small appliance branch circuits
yes
