final test sparky
When calculations in Article 220 result in a fraction of an ampere that is less than _____, such fractions can be dropped.
.50
If a 20A branch circuit supplies multiple receptacles, the receptacles shall have an ampere rating of no less than _____.
15a
For other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than _____ VA.
180
At least one receptacle outlet shall be located within _____ ft of the outer end of a peninsular countertop or work surface.
2
If the difference between the current leaving and returning through the current transformer of the GFCI-protection device exceeds _____, the solid-state circuitry de-energizes the circuit.
5mA
If the circuit's overcurrent device exceeds _____, the conductor ampacity shall have a rating not less than the rating of the overcurrent device.
800a
Using the standard load calculation method, the feeder demand factor for five household clothes dryers is _____ percent.
85
_____ shall not be located over the steps of a stairway.
Overcurrent devices
The current of the circuit can be determined by the formula I = ES/RT.
True
Series circuits are often used for _____ applications.
a and b
A short circuit is a _____ electrical connection between any two conductors of the electrical system.
a or b
_____ breakers permit the thermal trip setting to be adjusted to coordinate the circuit breaker's operation with other protection devices.
adjustable trip
Article 200 provides the requirements for _____.
all of these
Fuses shall be marked with their _____.
all of these
Overcurrent devices are not permitted to be located in the bathrooms of _____.
all of these
Overcurrent devices shall not be located _____.
all of these
The next higher standard rating overcurrent device above the ampacity of the ungrounded conductors being protected shall be permitted to be used, provided the _____.
all of these
The purpose of overcurrent protection is to protect conductors and equipment against excessive or dangerous temperatures because of overcurrent. Overcurrent is current in excess of the rated current of equipment or conductors. It may result from a(n) _____.
all of these
Where grounded conductors of different systems are installed in the same raceway, cable, or enclosure, each neutral conductor shall be identified to distinguish the systems by _____.
all of these
The continuity of a grounded conductor shall not depend on a connection to _____.
any of these
Plug fuses of the Edison-base type shall be used only _____.
as a replacement in existing installations
A thermal-magnetic circuit breaker typically clears fault current in less than 3 to 5 cycles when subjected to a(n) _____.
b or c
To help reduce the hazard of electrical fires from a parallel arcing fault, the NEC requires a listed AFCI-protection device to protect _____ wiring in dwelling unit bedrooms.
branch-circuit
Where it is unlikely that two or more noncoincident loads will be in use simultaneously, only the _____ the loads used at one time is required to be used in computing the total load to a feeder.
largest of
For attics and underfloor spaces, utility rooms, and basements in all occupancies, at least _____ lighting outlet(s) containing a switch or controlled by a wall switch shall be installed where these spaces are used for storage or contain equipment requiring servicing.
one
Circuit breakers shall _____ all ungrounded conductors of the circuit both manually and automatically unless specifically permitted otherwise.
open
Overcurrent protection for conductors and equipment is provided to _____ the circuit if the current reaches a value that will cause an excessive or dangerous temperature in conductors or conductor insulation.
open
A(n) _____ is the operation of equipment or conductors in excess of their rated ampacity.
overload
120V, single-phase, 15A and 20A branch circuits supplying outlets and devices installed in _____ of hotels and motels shall be protected by any of the means described in 210.12(A)(1) through (6).
quest rooms
The identification of terminals to which a neutral conductor is to be connected shall be substantially white or _____ in color.
silver
A circuit breaker with a _____ rating, such as 120/240V or 277/480V can be used on a solidly grounded circuit where the nominal voltage of any conductor to ground does not exceed the lower of the two values, and the nominal voltage between any two conductors does not exceed the higher value.
slash
A circuit breaker with a _____ voltage rating, such as 240V or 480V, can be used where the nominal voltage between any two conductors does not exceed the circuit breaker voltage rating.
straight
Kirchoff's Current Law states, "In a series circuit, the current is _____ through the transformer, the conductors, and the appliance."
the same
The white conductor within a cable can be used for a(an) _____ conductor where permanently reidentified to indicate its use as an ungrounded conductor at each location where the conductor is visible and accessible.
ungrounded
In devices or utilization equipment with polarized connections, identification of terminals to which a neutral conductor is to be connected shall be substantially _____ or silver in color.
white
Receptacles shall have the terminal intended for connection to the grounded conductor identified by a metal or metal coating that is substantially white or silver in color or by the word "_____."
white
The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed _____ percent of a multiple outlet branch circuit rating.
50
A circuit breaker having an interrupting current rating of other than _____ shall have its interrupting rating marked on the circuit breaker.
5000
The load for electric clothes dryers in a dwelling unit shall be _____ or the nameplate rating, whichever is larger, per dryer.
5000
The _____ sensing element causes the circuit breaker to open when a predetermined calibration temperature is reached.
thermal
An AFCI-protection device provides protection from an arcing fault by recognizing the characteristics unique to a parallel arcing fault and by functioning to de-energize the circuit when an arc fault is detected.
true
At least one lighting outlet controlled by a listed wall-mounted control device shall be installed in every habitable room, kitchen, and bathroom of a dwelling unit.
true
Circuit breakers and fuses are intended to interrupt the circuit, and they must have an ampere interrupting rating (AIR) sufficient for the available short-circuit current.
true
According to a NEMA report, 11 percent of the GFCI breakers protecting indoor receptacles failed, and _____ percent protecting outdoor receptacles failed.
20
A dwelling unit containing two 120V laundry branch circuits has a calculated load of _____ VA for the laundry circuits.
3000
The insulated grounded conductor(s) in a multiconductor cable _____ AWG or larger, shall be permitted to be re-identified at the time of installation at its terminations.
4
A dwelling unit containing three 120V small-appliance branch circuits has a calculated load of _____ VA for the small-appliance circuits.
4,500
Under the optional method for calculating a single-family dwelling service, general loads beyond the initial 10 kVA are assessed at a _____ percent demand factor.
40
To determine the feeder calculated load for ten 3 kW household cooking appliances, use _____ of Table 220.55.
column a
_____ conductors shall not be used for more than one branch circuit, one multiwire branch circuit, or more than one set of ungrounded feeder conductors except as allowed elsewhere in the Code.
equipment grounding
A 115/230V rated motor connected to a 230V circuit must have the windings connected in series so that each winding will receive at least 230V.
false
Ground-fault protection devices protect equipment from damaging ground-fault currents by opening all ungrounded conductors of the faulted circuit. This device will also protect persons.
false
The power consumed in a series circuit is equal to the power consumed by the largest resistance in the series circuit.
false
There can never be variations in the formulas used or the order in which they are used for series circuits.
false
Where there are two or more air-conditioning units served by the same feeder, it shall be permissible to apply a dwelling unit appliance load demand factor of 75 percent.
false
The screw shell of a luminaire or lampholder shall be connected to the _____.
grounded conductor
Circuit breaker enclosures shall be permitted to be installed _____ where the circuit breaker is installed in accordance with 240.81
horizontally
If you know the current of the circuit and the resistance of each resistor, the power of each resistor can be determined by the formula P = I2 x R.
true
Kirchoff's Voltage Law states, "In a series circuit, the sum of the voltage drops across all of the resistors equals the applied voltage."
true
No matter how many resistances there are in a series circuit, the sum of the voltages across all of the resistances equals the voltage of the source according to the Law of Proportion.
true
Resistance opposes the flow of electrons. In a series circuit, the total circuit resistance is equal to the sum of all of the resistances in series.
true
Severe electric shock or death can occur if a person touches the ungrounded and the neutral conductors at the same time, even if the circuit is GFCI protected.
true
The opening time for a protection device is inversely proportional to the magnitude of the current. The greater the current value, the less time it takes for the protection device to open.
true
The opposition to current flow results in a voltage drop of the circuit voltage.
true
To calculate the total resistance of the circuit: RT = R1 + R2 + R3 + ...
true
To determine the resistance of each resistive element in the circuit, use the formula R = E2/P. E is the rated voltage of the resistor, and P is the rated power of the resistor.
true
Unless marked otherwise, circuit breakers have a 5,000 AIC rating and fuses have a 10,000 AIC rating.
true
Where a motor is part of the noncoincident load and it is not the largest of the noncoincident loads, 125 percent of the motor load shall be used in the calculation if it is the largest motor.
true
Where a lighting outlet(s) is installed for interior stairways, there shall be a listed wall-mounted control device at each floor level and landing level that includes an entryway to control the lighting outlet(s) where the stairway between floor levels has six risers or more unless remote, central, or automatic control is used.
tue
Single-pole breakers with identified handle ties can be used to protect each ungrounded conductor for line-to-line connected loads.
ture
Supplementary overcurrent devices used in luminaires or appliances are not required to be readily accessible.
ture
The 3 VA per sq ft general lighting load for dwelling units includes general-use receptacles and lighting outlets.
ture
Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all _____ conductors at the point where the branch circuit originates.
ungrounded
