Question 1

Three or four USE conductors can be combined together in a single cable assembly and used in a residential underground service installation.This type of cable is referred to as __________ cable.

Accepted Answer

Three or four USE conductors combined together in a single cable assembly for residential underground service installation is referred to as Underground Residential Distribution (URD) cable.

Question 2

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

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 3

Incoming electrical power is connected to the ____________________ side of electrical equipment.

Accepted Answer

The answer of Incoming electrical power is connected to the...

Question 4

If aluminum service conductors are being used, make sure a(n) ____________________ is used at each termination point to prevent oxidation of the conductors.

Accepted Answer

The answer of If aluminum service conductors are being used,...

Question 5

Outgoing electrical power is connected to the ____________________ side of electrical equipment.

Accepted Answer

The answer of Outgoing electrical power is connected to the...

Question 6

Each panelboard must be protected on the __________ side with an overcurrent protective device having a rating equal to or less than the panelboard's ampacity rating.

Accepted Answer

The answer of Each panelboard must be protected on the...

Question 7

A(n) _________________________________ is a device used to provide a connection point for cable television, satellite TV, telephone, and any other system that requires being bonded to the house electrical power system grounding electrode.

Accepted Answer

The answer of A(n) _________________________________ is a device used to...

Question 8

The working space in front of residential service equipment as stated in NEC Section 110.26 is __________ feet.

Accepted Answer

NEC Section 110.26 requires a minimum working space of 3 feet in front of residential service equipment, such as a panelboard or switchboard. This space must be clear and extend from the floor to the height of the equipment. This ensures that electricians and other professionals have enough space to safely work on the equipment without obstruction.

Question 9

The meter socket is usually located so the center of the kWh meter is from ____________________ to ____________________ feet above final grade.

Accepted Answer

The answer of The meter socket is usually located so...

Question 10

A service mast is made of rigid metal conduit or intermediate metal conduit and should be at least a __________ trade size conduit to provide adequate strength.

Accepted Answer

A service mast needs to have adequate strength to support the overhead service conductors. A 2-inch trade size conduit is the minimum size required to provide the necessary strength.

Question 11

Explain the purpose of a weatherhead when used on either a service raceway or a service entrance cable.

Accepted Answer

The answer of Explain the purpose of a weatherhead when...

Question 12

Explain why subpanels are often used in residential services.

Accepted Answer

The answer of Explain why subpanels are often used in...

Question 13

The service drop for a residential overhead service entrance is usually installed with __________.

Accepted Answer

Triplex cable is the most common type of cable used for residential overhead service entrance. It consists of two insulated conductors and one bare conductor twisted together. This provides the necessary polarity for the service entrance, and the bare conductor serves as the neutral and grounding conductor.

Question 14

Explain what an MLO panel is.

Accepted Answer

The answer of Explain what an MLO panel is....

Question 15

A(n) __________ usually includes a weatherhead, a porcelain standoff fitting, a rubber weather collar, and a piece of roof flashing.

Accepted Answer

A mast kit typically includes all of these components and is used for mounting the service cable and connecting it to the electrical service entrance. A service packet, service entrance package, and entrance kit may refer to a broader set of components and materials needed for the electrical service entrance installation, which could include additional parts beyond those listed.

Question 16

A(n) ____________________ is a surface on which a service panel or subpanel is mounted.It is usually made of plywood and is often painted a flat black color.

Accepted Answer

The answer of A(n) ____________________ is a surface on which...

Question 17

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 __________.

Accepted Answer

The amount of voltage that is lost as the current travels from the utility transformer to the service panel and back is called the voltage drop. The voltage that is needed to push the current through the wires is simply referred to as voltage, but the question specifically asks for the voltage needed to overcome the resistance of the wires. "House current" is not a technical term and "pressure" is not an accurate description of electrical voltage.

Question 18

Conduit clamps used to support a service raceway installed on the side of a house must be installed no more than ____________________ feet from the weatherhead and meter socket.

Accepted Answer

The answer of Conduit clamps used to support a service...

Question 19

A(n) ____________________ is a type of conduit body that allows for a 90-degree change of direction in a raceway path.It is often used to allow the service raceway to run from the meter socket, through the side of the house, and continue to the service equipment enclosure.

Accepted Answer

The answer of A(n) ____________________ is a type of conduit...

Question 20

A _________________________ is installed over the service cable at the point where it goes through the hole in the side of the house to prevent water from entering the house.

Accepted Answer

The answer of A _________________________ is installed over the service...

Quiz 8: Service Entrance Equipment and Installation