Conduit and Panel Boards Mid Term
12
120/240-volt overhead service conductors must maintain a vertical clearance of at least ___________ feet above the back yard of a house.
photocell
A light-sensing device used to control lighting fixtures in response to detected light levels is called a __________.
8
Direct buried conductors emerging from the ground must be protected to a point at least __________ feet above finished grade.
10
For a permanently installed swimming pool, any 15 or 20 amp, 125 through 250 volt rated receptacle located within __________ feet of a pool's inside wall must be GFCI protected.
6
For spas and hot tubs, at least one 125-volt, 15 or 20 ampere rated receptacle must be installed at least __________ from the inside wall of the spa or hot tub.
3
Good wiring practices require electricians to install at least __________ lighting outlets in a two-car garage to provide adequate lighting.
8
Ground rods must be at least ________ feet long.
5
In an outdoor pool area, the NEC requires luminaries, ceiling suspended paddle fans, or lighting outlets not to be installed over the pool or an area extending __________ feet horizontally from the inside wall of the pool.
one 125-volt, 15 or 20 amp receptacle and one wall switch-controlled lighting outlet.
In attached garages, the NEC requires at least __________.
150
Lighting fixture assemblies for storage pools are permitted as long as the lamp operates at no more than __________ volts.
2 to 6
One set of service entrance conductors is permitted to supply __________ service disconnecting means instead of a single main disconnect.
3
Pool motors can be cord and plug connected but if they are, the cord can't be more than __________ feet long and must contain an equipment grounding conductor sized according to. Table 250.12.
10
RMC,IMC,EMT, and PVC conduits come in standard __________ foot lengths.
10
Rigid Metal Conduit must be supported at least every __________ feet along a conduit run. (General Rule)
36"
Rigid Metal Conduit must be supported within __________ of outlet boxes, cabinets, and conduit bodies. (General Rule)
3
The working space in front of residential service equipment as stated in NEC section 110.26 is __________ feet.
URD
Three or four USE conductors can be combined together In single cable assembly and used in a residential underground service installation. This type of cable is referred to as __________ cable.
saddle
Three-point and four-point bends are types of __________ bends.
informative annex C
To find the maximum number of conductors of the same size and insulation type permitted in various types and sizes of conduit, you would look in __________ of the National Electric Code.
both A and B
Type UF cable can only be used outdoors in direct exposure to the sun only if __________.
2
Underground service conductors installed as a cable assembly are required to be buried at least _______ feet by the NEC.
Utility Company
What group is the final authority for determining the required vertical clearances for service conductors?
12
When Type NM or Type SER cable is used as a feeder cable supplying power to a sub-panel, the cables must be supported within __________ inches of both the main panel and the sub-panel.
20
When a ground ring is used as a grounding electrode, it must be at least a 2 AWG copper conductor at least ________ feet long.
10
When a metal underground water pipe is used as a grounding electrode, it must be in contact with the earth for at least _______ feet.
12"
When a warning ribbon is required to mark the location of buried underground conductors, it must be placed at least ___________ above the buried conductors.
8
When bonding the various metal parts of a permanently installed swimming pool, all bonding wires must be solid copper and be __________ AWG or larger.
All of the above
When bonding together the noncurrent carrying metal parts of a service entrance, which of the following methods may be used?
3
When installing an overhead service, ____________ feet of the conductor should stick out of the weather head for the formation of a drip loop.
12"
When installing an underground service, a warning tape must be installed at least __________ above the buried service entrance conductors.
40
When installing more than two conductors in a conduit or tubing, the maximum percentage of fill allowed by the NEC is __________.
8 Feet
When installing service drop conductors above a residential roof, conductors must have a vertical clearance of at least _______________ (General Rule).
must be run
When running branch circuit wiring in a raceway from an electrical panel inside the house to pool associated motors, an insulated equipment grounding conductor __________.
12"
When using service entrance cable for the run between the weather head and the meter socket, the cable must be supported wishing __________ of both the weather head and the meter socket.
None of the above
Where more than one ground rod, pipe, or plate is used, the grounding electrodes must be at least __________ feet apart.
6
A permanently installed swimming pool must have at least one 125-volt, 15 or 20 amp receptacle located a minimum of __________ feet from the inside wall of the pool.
2"
A service mast is made of rigid metal conduit or intermediate metal conduit and it should be at least a __________ trade size conduit to provide adequate strength.
False
A steel fish tape should be used when pulling conductors through an installed conduit system and into an energized load center.
back-to-back
A(n) __________ bend is a conduit bend formed by two 90-degree bends with a straight length of conduit between the two bends.
offset
A(n) __________ bend is a conduit bend that is made with two equal-degree bends in such a way so the conduit changes elevation and avoids an obstruction.
saddle
A(n) __________ bend is a conduit bend that results in a conduit going over an object that is blocking the path of the run.
grounding electrode
A(n) __________ is a conducting object through which a direct connection to the earth is established.
insulated bushing
A(n) __________ is a plastic or fiber fitting designed to screw onto the ends of a conduit or cable connector to provide protection to the conductors.
neutral conductor
A(n) __________ is the conductor connected to the neutral point of a system and is intended to carry current under normal conditions.
mast kit
A(n) __________ usually includes a weather head, a porcelain standoff fitting, a rubber weather collar, and a piece of roof flashing.
2 AWG
According to NEC Table 250.66, the minimum size copper grounding electrode conductor for a service entrance installed with 4/0 copper conductors is ______________.
6'
According to Underwriters Laboratories, lengths of Flexible Metal Conduit longer than __________ have not been judged suitable for grounding purposes.
24
According to the NEC, the minimum burial depth for a direct buried cable like Type UF is __________ inches. (General Rule)
3
According to the NEC, the working space in front of a service entrance panel in a residential wiring application must be at least 6.5' high, 30" wide, and extend at least __________ feet in front of the panel.
All of the above
According to the NEC, which of the following 125 volt, 15 or 20 amp duplex receptacles installed in a garage to serve cord and plug appliances such as a refrigerator or freezer, requires GFCI protection?
680
Article __________ in the NEC covers the requirements for swimming pools, hot tubs, and hydro massage tubs.
12
Assuming a 20 amp circuit breaker and GFCI protection, the minimum burial depth for a Type UF cable running to a 120 volt pole light at a residence is __________ inches.
True
Conduit systems must be completely installed before the electrical conductors are permitted to be pulled in.
3/4"
Copper coated steel ground rod must be listed and be at least _________ in diameter.
10'
EMT must be supported at least every __________ along the run. (General Rule)
3
ENT must be supported at intervals not exceeding __________ feet.(General Rule)
All of the above
Expansion fittings are generally provided in exposed runs of rigid pic conduit where __________.
12, 30
Service entrance cables must be supported by straps of staples within ________ inches of any electrical enclosure and at intervals not exceeding __________inches.
EMT
The NEC defines __________ as unthreaded thinwall raceway of circular cross section designed for the physical protection and routing of conductors and cables.
110
The NEC provides the specifications for working space around electrical equipment in Article __________.
300.5
The NEC requirements for a minimum burial depths are found in Table__________.
10
The NEC requires a clearance of at least _______________ feet above final grade for service conductors where they are connected to the building, above sidewalks and other areas accessible to pedestrians.
None of the above
The NEC requires a minimum clearance of ________________ feet above residential property and driveways where the voltage to ground does not exceed 300 volts.
18
The NEC requires a vertical clearance of at least _________ feet above public streets, alleys, roads, and parking areas subject to truck traffic.
insulated bushing
The NEC requires that a(n) __________ be used for the protection of conductors sized 4 AWG and larger installed in conduit.
shall not
The NEC requires that if a feeder supplying a detached garage from the service in the main house has an equipment grounding conductor run with the feeder, the grounded conductor __________ be connected to the equipment grounding conductor or to the grounding electrode system in the garage.
arrow
The __________ on a conduit hand bender head is where you will place the bending mark when doing a stub-up bend.
start point
The __________ on a conduit hand bender head is where you will place the bending mark when doing the second 90 degree bend of a back to back bend.
rim notch
The __________ on a conduit hand bender head is where you will place the middle bending mark when doing a three-point saddle bend.
grounding electrode conductor
The _____________ is the conductor used to connect the grounding electrode to a system conductor or equipment.
voltage drop
The amount of voltage that is needed to push the house electrical load current through the wires from the utility transformer, to the service panel, and back to the transformer is called __________.
15
The conductors that provide power to pool lighting fixtures must be GFCI protected if the voltages is above __________ volts.
Service drop conductors
The conductors that run overhead from the utility transformer to the residence are called the __________.
5
The grounding electrode conductor must be attached to a metal water pipe grounding electrode no more than __________ feet from the point where the metal water pipe enters the house.
there is no NEC requirement
The maximum distance between receptacles in a garage is __________ feet.
16
The metric designator for 1/2" trade size EMT is __________.
155
The metric designator for 6" trade size rigid metal conduit is __________.
300.5
The minimum burial depth for type UF cable can be found in table __________ of the NEC.
All of the above
The most common types of conduit bodies include which of the following?
Service Drop
The overhead service conductors from the last pole to the point connecting them to the service entrance conductors at the building are called _____________ conductors.
Service point
The point of connection between the wiring of the electric utility and the house wiring is called the _______________________.
All of the above
The securing and supporting requirements for liquid tight flexible metal conduit (Type LFMC) are the same as which of the following?
service lateral
The service conductors that run underground from the utility transformer to the meter socket are known as the __________.
service entrance cable
The service drop for a residential overhead service entrance is usually installed with __________.
triplex cable
The type of cable normally used as the service drop for a residential service entrance is called.
31%
Where only two conductors are installed in a raceway, the conduit cannot be filled to more than __________ of the conduit's cross-sectional area.
8
Where underground service cables exit the trench and run up a utility pole to the transformer, the conductors must be protected from physical damage to a height of __________ feet above final grade.
electrical metallic tubing
Where underground service conductors exit the trench to run up to a meter socket on the side of a house, __________ is not permitted to be used to provide the conductors with protection from physical damage.
50
Without a special ballast, fluorescent lamps installed In a garage usually will not start when exposed to temperatures below __________ degrees F.
service entrance cable
__________ is a common wiring method used to bring the electrical power from the point of attachment to the meter socket and then on to the main service equipment.
Take up
__________ is the amount that must be subtracted from a desired stub-up height so the bend will come out right.
Equipment
____________ is a general term used for material, fittings, devices, appliances, machinery, and other parts used in connection with an electrical installation.
