Section 1
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A continuous load is one that is on for more than_____ hours so conductors must be sized at____% of that load
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Last updated
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Date created
Mar 1, 2020
Cards (79)
Section 1
(50 cards)
A continuous load is one that is on for more than_____ hours so conductors must be sized at____% of that load
3, 125
In a panelboard, the busses supplying the citcuit breakers are so arranged so that connections directly across from each other are on the same phase and the adjacent connections on each side are on different phases true or false
false
An_____ transfer switch is used to switch a load from its normal primary source to the emergency source without any human interaction and a ______ transfer switch will switch a load but requires a person to operate it
automatic , manual
The NEC requires a minimum of ______ inches of conductor in a box and at least______ inches shall extend past the front of the box
6 , 3
An individual appliance branch circuit shall have a rating less than the appliances "marked rating" True or False
false
Standard light fixture boxes are rated to support fixtures not weighing over_____ pounds
50
Four #4 awg, type THW copper current carrying conductors are installed in a conduit in a boiler connected to these conductors is _____ amps
51
What are the four types of fuel in generators?
propane gas, natural gas, gasoline, diesel
AC systems exceeding____ volts to ground that supplies premise wiring shall be grounded if on 3 phase, 4 wire wye connected circuit
50
A receptacle is required in any habitable room on any wall space_____inches or greater in width and with-in____ feet of a doorway or opening. Wall receptacle are to be placed no more than____feet apart
24, 6, 12
The maximum setting of ground fault protection shall be 1200 amperes and the maximum time delay shall be one second for ground faults equal to or greater than 300 amperes true or false
false
All appliances are required to have a nameplate that indicates.....
identifying name , frequency, volts/amps, watts
Besides the General lighting branch circuits, name the other 20 amps circuits required by the code in a dwelling with a garage. Qty-2: ________, _________, _________, __________
small appliance, laundry branch circuit, bathroom branch circuit, garage
How many 10 stranded conductors are allowed in a 3 X 2 X 2 3/4 device box?
5
The manufactures factory testing of the ground fault equipment is considered adequate true or false
false
In a location where there us heating or air conditioning equipment , a receptacle is to be installed with-in_____feet of the equipment on the same _____
25, level
A box, with clamps, contains 2 # 14/2 NM cables and a receptacle. How much volume must you allow for: clamps______ cu. in, Grounds________, cu. in & receptacle______cu. in
2, 2, 4
What is the minimum cubic-inch volume required for a box that will contain one internal clamp, one switch ( supplied by #14 conductors), and one receptacle ( supplied by # 12 conductors ), two 14/2 NM cables?
30 cu. in
For circuit rated at less than 100 amperes, the terminals for the conductor(s) terminations are rated for ______ degree C conductors
60
A 3200 square foot house, with 600 sq. ft. of additional non-adaptable unfinshed space, requires how many 15 amps lighting branch circuits?
6
How many number 14 conductors allowed in a 4" square box that is 1 1/4 deep?
5
Storage batteries used in emergency systems shall be capable of maintaining the load for____ hours (minimum) and without the voltage dropping below____percent of normal
1 1/2 , 87 1/2
How much volume must you allow in a box for a number 12 conductor?
2.25 cu. in
In bathroom a receptacle must be installed on an______ wall with-in____Ft of the edge of the_____ or in cabinet no more than____inches below the counter top
adjacent, 3, basin , 12
A panelboard's maximum rating is determined by the current carrying capacity of the panel boards internal main______
buss bars
Eight conductors in a conduit must be de-rated to____%
70
If a load is expected to be on for more than three hours, then it is considered to be a (an)________ load
continuous
When the ampacity of a conductor does not correspond to the standard fuse or circuit breaker rating, the code allows you use the next higher rating unless that rating is excess of______ amps
800
Halls greater than_____ feet in length, as measured down the_____ are required to have receptacle
10, center line
A switchboard can be accessible from the front and rear true or false
true
Split-wired duplex receptacles, where only one 1/2 of it is switched, do meet the spacing requirements required by the NEC true or false
true
The NEC requires receptacles to be mounted with the ground up true or false
false
A_____ _______ is the circuit conductors between the final over current protection device and the outlets
branch circuit
If an appliance rating does not exceed 1/8 horsepower or does not exceed 300 volt amps, the branch circuit over current device may serve as the appliances disconnecting means True or False
true
A service is supplied by three number 500 KC MIL conductors per phase, What is the minimum size grounding electrode conductor required?
3/0
Foyers, not part of hall, that have an area greater than_____sq.ft shall have a receptacle installed on any wall space greater than_____feet in width
60, 3
The conductor on the "high-leg" of a 3 phase open delta system must be marked or identified by using the color_____and in panel installed on the _____ phase
orange, B
What table is used to find the value of volt-amperes per square foot for general lighting loads?
220.12
Ground fault protection for equipment shall be provided for solidly grounded wye electrical servies of more than how many volts to ground?
150 volts
In walls constructed of noncombustible materials you are allowed to have a box set back in the wall no more than_____of an inch and gaps around the box cannot exceed_____ of an inch
1/4, 1/8
When sections of electrical equipment are bolted together, non conductive paint, enamel, or similar coatings must be removed to insure good _____ ______
electrical continuity
The NEC allows grounding conductors to be spliced with _________ welding processes
exothermic
Rod and pipe electrodes shall not be less than____feet in length
8
Construction plans for a building are usually called _________ or working drawings and the documents governing all of the material to be used and work to be performed on a construction project are called the ______
blue prints, specifications
Conductors installed in a conduit, that is less than 24 inches long, are not required to be de-rated True or False
true
Show window lighting is required to be calculated at____va per linear foot and in commercial buildings, receptacles outlets are to be calculated at________va each
200, 180
In resistance, the minimum number of lighting branch circuits required is based on ______VA per square ft
3
That portion of the wiring system between the final over current device protecting the circuit and the outlet(s) is called a _________ circuit
branch
The oil in a liquid filled transformer is for cooling and insulation true or false
true
To regard to a commonly used emergency, back-up power source, the initials U P S stand for________ power supply and it's most commonly used source of short term power is ______
uninterruptible, batteries
Section 2
(29 cards)