Electrical

Question 1

Service cable over public streets, roads, alleys, and parking areas with truck traffic should be what height?

Answer 1

18 feet

Question 2

If one of the the hot wires on the service is tide back, the report should state that the service is only what?

Answer 2

120 volt

Question 3

Service cable’s height over residential properties, yards, driveways, and any other parking areas should be?

Answer 3

12 feet

Question 4

A mast in excess of 3 feet above a roof surface may require?

Answer 4

Support

Question 5

A service cable going over a roof of less than 4:12 with no pedestrian traffic should be at what height?

Answer 5

8 feet, maintained for a distance of at least 3 feet in all directions from the edge of the roof

Question 6

Square meter bases: Typically found on homes from the 1950s to 1970s are rated for how many amps?

Answer 6

100-125 amps

Question 7

A service cable of 300v or less crossing over a roof surfaces area that is guarded or isolated should be what height?

Answer 7

3 feet

Question 8

A service cable’s vertical clearance to a through-the-roof raceway or approved support above the overhanging portion of the roof that is less than 4 feet measured horizontally should be what?

Answer 8

18 inches

Question 9

Service cable’s height over all walking areas, sidewalks, decks, roof surfaces and patios used by pedestrians only, measured from final grade or other accessible surfaces?

Answer 9

10 feet at the electrical service entrance, at the lowest point of the drip loop

Question 10

For a 3-phase power supply, the inspector needs to defer to?

Answer 10

A Qualified industrial or commercial electrical contractor.

Question 11

Service drop’s height over commercial parking areas?

Answer 11

18 feet

Question 12

Rigid conduit should be attached to the structure every ______ from both sides of the meter base and 5 to 6 feet along its length.

Answer 12

12 inches

Question 13

SE cable not in conduit should be attached to the building every _______ along its length and within a foot of its top and any meter can.

Answer 13

30 inches

Question 14

Type UF cable must be buried to a depth of ?

Answer 14

18 to 24 inches

Question 15

Round meter bases were common in the 1920s and 1950s are rated for how many amps?

Answer 15

60 amps

Question 16

Service drop’s height over roofs surfaces having a slope of 4:12 or greater

Answer 16

3 feet

Question 17

Rectangular meter bases are the current minimum on single-family homes and are rated?

Answer 17

200 amps and typically bear the marking “200CL.”

Question 18

SEC’s vertical clearance from sides of doors, porches, decks, stairs, ladders, fire escapes and balconies, and from the sides and bottom of windows that open

Answer 18

3 feet from the bottom, sides and front

Question 19

Which branch circuit conductors should be sized one to two sizes larger than copper?

Answer 19

Aluminum

Question 20

If a service entrance has a 200-amp supply, the minimum cable size should be what?

Answer 20

2/0 copper or 4/0 aluminum

Question 21

The maximum breaker rating ______ exceed the allowable ampacity of the conductor.

Answer 21

must not

Question 22

A service drop should be at least _______ away from any nearby trees.

Answer 22

5 to 6 feet

Question 23

An electrical service mast that extends _________ above the roof surface needs to be supported separately.

Answer 23

5 feet or more

Question 24

Rigid service masts should be secured to the structure every ________.

Answer 24

5 to 6 feet

Question 25

The typical supply for a Square brand electric meter is what?

Answer 25

100 amps

Question 26

The minimum conductor size for a 100-amp service is what?

Answer 26

4-awg copper or 2-awg aluminum

Question 27

Most areas require how many means of separate grounding?

Answer 27

2

Question 28

The minimum size for a listed, stainless steel, driven grounding rod is what?

Answer 28

5/8-inch diameter and 8 feet long.

Question 29

Which supply piping cannot be used as a grounding means?

Answer 29

Gas

Question 30

Which panel enclosures need to be bonded to ground?

Answer 30

All of them

Question 31

The grounded and grounding conductors can share a common bus in which panel?

Answer 31

The service panel.

Question 32

You can bond a remote distribution panel by connecting the enclosure to what?

Answer 32

The grounding bus

Question 33

A split-bus electrical panel uses a double-pole breaker to _____ the 120-volt circuits.

Answer 33

Isolate

Question 34

The minimum service required for a new single family home is what?

Answer 34

100 amps

Question 35

What size wire would be used for 200 amps?

Answer 35

4/0 Aluminum/Copper-Clad or 2/0 Copper

Question 36

Most homes constructed between 1930 and 1950 originally had what size service?

Answer 36

60-amp

Question 37

Are wire splices an electrical panel defect?

Answer 37

No

Question 38

What size wire would be used for 150 amps?

Answer 38

2/0 Aluminum/Copper-Clad or #1 Copper

Question 39

The available service amperage is based on what?

Answer 39

The lowest rated component.

Question 40

What size wire would be used for 100 amps?

Answer 40

#2 Aluminum/Copper-Clad or #4 Copper

Question 41

Where is a service panel not allowed?

Answer 41

Inside a bathroom, over stairs, or inside a clothes closet.

Question 42

What size wire would be used for 125 amps?

Answer 42

1/0 Aluminum/Copper-Clad or #2 Copper

Question 43

Electrical service panels should be in a clear space measuring what?

Answer 43

30" wide by 78" high by 36" deep.

Question 44

What type of screws are not allowed for grounding connections?

Answer 44

Sheet metal screws

Question 45

Correct breaker types should be used for each panel-board, according to what?

Answer 45

The manufacturer’s label.

Question 46

No circuit should be identified in a way that may be subject to change with?

Answer 46

Occupancy.

Question 47

All 15- and 20-amp 120-volt circuits for dining rooms, living rooms, bedrooms, sun rooms, closets, hallways, or similar areas must be protected by?

Answer 47

AFCI

Question 48

All unused holes in the panel should be?

Answer 48

Closed.

Question 49

To isolate grounds and neutrals, subpanels should be supplied with a conductor with how many wires?

Answer 49

4

Question 50

If they are the same size, and the maximum number of conductors does not exceed the recommendations of the panel manufacturer, multiple what may be installed under the same terminal?

Answer 50

Multiple grounding conductors or “grounding wires”.

Question 51

If over-current protection is provided for the feeder conductors, the subpanel does not require a what?

Answer 51

A main breaker.

Question 52

In a subpanel, what must not be installed to the neutral bar?

Answer 52

A bonding jumper

Question 53

How many amps would a typical subpanel supplied by a feeder using #2 AL SEC cable or #4 CU SEC cable be?

Answer 53

100-amps

Question 54

Unless identified by the manufacture, how many neutral wires should be on a single terminal?

Answer 54

One.