Ch 6 - Branch Circuit
250 kcmil ; 350 kcmil
According to NEC Table 310.15(B)(7) in the 2011 NEC, the minimum conductor size for a 300 ampere residential service entrance is _________ CU or _________ AL.
20 amps
According to Table 310.15(B)(16) in the 2011 NEC, the ampacity for a 12 AWG copper conductor using the 60 degree Celsius column is ____________.
100 amps
According to Table 310.15(B)(16) in the 2011 NEC, the ampacity for a 3 AWG copper conductor using the 75 degree Celsius column is ____________.100 amps
buss bar
The rating of a panelboard is based on the ampacity of the __________.
bundled
When cables or conductors are physically tied, wrapped, or taped together, they are considered to be ______________.
3000
When doing a service entrance calculation and applying the demand factor to the total load of the general lighting load, the small appliance circuits, and the laundry circuit, the first ___________ volt-amps are computed at 100%.
75
When doing a service entrance calculation, if a residence has four fixed appliances, a demand factor of __________% is applied to the total load of these appliances.
one watt
When doing branch circuit, feeder, and service entrance calculations, one volt-amp equals __________.
large appliance
_______________ is a type of branch circuit not found in residential wiring.
5700
A 1900 square foot residence has a general lighting load of ____________________ volt-amperes.
42
A 200-ampere rated panel is designed and manufactured to accommodate up to __________ circuits.
2-wire, 240 volt
A _____________ load does not require a grounded conductor.
supplemental
A _______________ grounding electrode is a grounding electrode used to 'back-up' a metal water pipe grounding electrode.
finished basement
A ________________ is included when computing the general lighting load of a house.
kitchen lighting fixture
A ____________________ is not permitted to be connected to a small appliance branch circuit.
4
A house with 2,000 square feet of habitable living space will require at least _________ general lighting circuits if 15-ampere circuit breakers are used to provide circuit protection.
8000
A household electric range has a rating of 11 kW. When computing the service load, a minimum of _____________ watts will be used.
outlet
A point on the wiring system at which current is taken to supply electrical equipment is called a/an _________.
branch circuit
A(n) __________ is the circuit conductors between the final overcurrent device and the outlets.
2/0 AWG; 4/0 AWG
According to NEC Table 310.15(B)(7) in the 2011 NEC, the minimum conductor size for a 200 ampere residential service entrance is _________ CU or _________ AL.
3
According to the NEC, the unit load used to calculate the minimum number of general lighting circuits in a dwelling is __________ volt-amperes per square foot.
600/800
Another way to calculate the minimum number of general lighting circuits required in a dwelling unit is to divide the total habitable square foot living area by ____________ square feet for 15 amp branch circuits and ______________ square feet for 20 amp branch circuits.
191
Dividing the total computed load in volt-amperes by the service voltage of ________________ volts will give the minimum ampacity the service conductors must be rated for.
20
For the types of branch circuits found in residential wiring, the fuse or circuit breaker size can never be larger than _______________ amps for a 12 AWG copper conductor.
5000
If an electric dryer has a nameplate rating of 4,500 watts, ____________________ watts will be used in the standard method service calculation.
3
If cables are bundled together for more than 24" and the total number of current-carrying conductors exceeds __________, the ampacity of the conductors must be derated.
bathroom
In a residential wiring, a ____________ does not have its power supplied by a small appliance circuit.
outlets
Kitchen lighting ____________ are not permitted to be connected to any of the small appliance branch circuits that provide power for the kitchen receptacles.
2
The NEC requires at least ________________ small appliance circuits be installed in each dwelling unit.
1500
The NEC states that each two-wire small appliance circuit shall be computed at ____________________ volt-amperes.
5000
The NEC states that the load for a household electric dryer must be computed at ______________ watts or the nameplate rating, whichever is greater.
feeder circuit
The circuit conductors between the service equipment and the final branch circuit overcurrent protection device is a(n) __________.
100
The minimum service entrance rating for a single-family home permitted by the NEC is __________ amperes.
ampacity
____________________ is the current in amperes that a conductor can carry continuously under certain conditions of use without exceeding its temperature rating.
ambient
____________________ temperature is the temperature of the air that surrounds an object on all sides.
