Question 1

A porcelain standoff fitting is used to attach the service drop cable to the side of a house.

Accepted Answer

Cable hook

Question 2

The service conductors that run underground from the utility transformer to the meter socket are known as the __________.

Accepted Answer

The conductors that run underground from the utility transformer to the meter socket are known as the service lateral. Service drop conductors refer to the conductors that run from the utility pole or overhead wires to the building. Service entrance conductors refer to the conductors that run from the meter socket to the building's electrical panel. Triplex conductors refer to a specific type of cable that is used for overhead service drops.

Question 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.

Accepted Answer

B

Question 4

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.

Accepted Answer

According to the National Electrical Code (NEC), the grounding electrode conductor must be attached to a metal water pipe grounding electrode no more than 5 feet from the point where the metal water pipe enters the house.

Question 5

The conductors that run overhead from the utility transformer to the residence are called the __________.

Accepted Answer

Service drop conductors are specifically designed to run overhead from the utility transformer to the residence. Service entrance cable refers to the cable that runs from the meter to the main electrical panel inside the house. Service laterals run underground instead of overhead. SEU cable is a type of service entrance cable, but not specifically for overhead use.

Question 6

When installing a service entrance cable to the bottom of a meter socket enclosure located on the side of a house, you must use a rain-tight connector like the one used to connect the cable to the threaded hub.

Accepted Answer

A "regular" cable clamp can be used.

Question 7

The NEC requirements for minimum burial depths are found in Table __________.

Accepted Answer

The NEC requirements for minimum burial depths are found in Table 300.5.

Question 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.

Accepted Answer

The conductors must be protected from physical damage to a height of 8 feet above final grade. This is a standard safety requirement to prevent accidental contact or damage to the cables.

Question 9

In a sub-panel, the grounding bar and the neutral bar are electrically connected together so that the white grounded conductors and the bare or green grounding conductors can all terminate at the same location.

Accepted Answer

In a sub-panel, the grounding bar and the neutral bar should be separate and not electrically connected together. The neutral bar should only be for the white grounded conductors and the grounding bar should only be for the bare or green grounding conductors.

Question 10

When installing an overhead service, __________ feet of conductor should stick out of the weatherhead for the formation of a drip loop.

Accepted Answer

The answer of When installing an overhead service, __________ feet...

Question 11

When installing an underground service, a warning tape must be installed at least __________ above the buried service entrance conductors.

Accepted Answer

According to the National Electrical Code (NEC), warning tape must be installed at least 12 inches above the buried service entrance conductors to alert future excavators of the presence of the buried electrical service. This helps prevent accidental damage to the conductors during future construction or digging activities.

Question 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.

Accepted Answer

According to NEC 334.30, when Type NM or Type SER cable is used as a feeder cable supplying power to a subpanel, the cables must be supported within 12 inches of both the main panel and the subpanel.

Question 13

The NEC provides the specifications for working space around electrical equipment in Article __________.

Accepted Answer

Article 110 of the NEC provides the requirements for working space around electrical equipment.

Question 14

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.

Accepted Answer

The answer of Where underground service conductors exit the trench...

Question 15

Electrical Metallic Tubing is permitted to be used as a service raceway.

Accepted Answer

According to the National Electrical Code (NEC), Electrical Metallic Tubing (EMT) is permitted to be used as a service raceway, as long as it meets the requirements outlined in Article 358.

Question 16

If a metal water pipe is used as a grounding electrode, a supplemental grounding electrode must be used only if the resistance to ground exceeds 25 ohms.

Accepted Answer

A supplemental grounding electrode must be used with a metal water pipe regardless of the resistance to ground.

Question 17

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.

Accepted Answer

An insulated bushing is a fitting designed to screw onto the end of a conduit or cable connector to provide protection to the conductors. It is typically made of plastic or fiber material and helps to insulate the conductors from the metal conduit or connector, preventing damage or short-circuits. A threaded hub is also a type of fitting used for connecting conduits, but it does not provide insulation or protection to the conductors. A bushing and connector nut may be used in electrical installations, but they do not provide insulation or protection to the conductors in the same way that an insulated bushing does.

Question 18

When connecting sub-panel feeder conductors in the main panel, both the grounded neutral conductor and the grounding conductor are connected to the main panel grounded neutral bar.

Accepted Answer

This is true according to NEC (National Electrical Code) requirements. The grounded neutral conductor and the grounding conductor both connect to the main panel grounded neutral bar in order to ensure proper grounding and bonding of the sub-panel.

Question 19

__________ 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.

Accepted Answer

Service entrance cable is the common wiring method used to bring electrical power from the point of attachment to the meter socket and then on to the main service equipment. Triplex cable, service drop conductors, and service laterals are also used in electrical installations but are not specifically designed for this purpose.

Question 20

When using service entrance cable for the run between the weatherhead and the meter socket, the cable must be supported within __________ of both the weatherhead and the meter socket.

Accepted Answer

The answer of When using service entrance cable for the...

Quiz 8: Service Entrance Equipment and Installation