Residential Wiring

Question 1

A service entrance panel should be mounted how high above finished grade ?

Answer 1

48 to 72 inches

Question 2

What is connected to a circuit breaker or fuse ?

Answer 2

The underground connector

Question 3

On what side of the meter socket are the service entrance conductors that feed the service entrance panel connected ?

Answer 3

Load side

Question 4

The current carrying capacity of a conductor depends on two things what are they ?

Answer 4

The material the wire is made of and the size or gauge of the wire

Question 5

The size of the service entrance conductors depend on what ?

Answer 5

The total electrical load

Question 6

What does 14/3 WG on Non-Metellic sheathed cables “Romex” tell you?

Answer 6

Size of the wire , number of conductors , with ground

Question 7

When wiring a switch leg , the power enters what first ?

Answer 7

The light

Question 8

A ground conductor will

Answer 8

Never be in series with a fuse , circuit breaker or switch

Question 9

On a construction site, temporary service may remain in place until ?

Answer 9

The building is ready to receive power through its own panel

Question 10

What do you call a safety device that automatically shuts off the power when an overload or short circuit occurs and can be manually reset

Answer 10

GFCI

Question 11

What are 3 types of GFCI’s ?

Answer 11

° portable
°receptacle
°circuit breaker

Question 12

What or who determines the side of the circuit breaker needed to protect a circuit ?

Answer 12

Gauge of the wire

Question 13

A GFCI monitors the current balance between ?

Answer 13

Grounded and ungrounded conductors

Question 14

Another name for a weather head is ?

Answer 14

Service head or service cap

Question 15

Some light fixtures are center mounted on a threaded metal tube called a ?

Answer 15

Nipple

Question 16

On a CSR what does the letter M connect to

Answer 16

Run winding

Question 17

The power company needs how many feet of conductor hanging out of the service head to hook to their drop wires ?

Answer 17

3 to 4 feet

Question 18

The NEC requires you have a minimum of how many small appliance circuits in a dwelling ?

Answer 18

2

Question 19

What is the minimum copper wire size and circuit breaker size allowed in a dwelling ?

Answer 19

14 AWG @ 15 amps

Question 20

What are the minimum copper wire and circuit breaker size for a small appliance circuit ?

Answer 20

12 AWG @ 20 amps

Question 21

What are the three most common symbols found on an electrical blueprint ?

Answer 21

Switch , ceiling fan outlet and duplex receptacle

Question 22

On a separate 120 V 20Va laundry room circuit , what other loads are allowed ?

Answer 22

any receptacle located in the laundry room

Question 23

Service entrance conductors that run up through metal conduit from underground into the SEP are called ?

Answer 23

Risers

Question 24

Two ways power can be brought into a building is ?

Answer 24

Overheard and underground

Question 25

Which color is a grounded conductor

Answer 25

White

Question 26

A meter shunt is

Answer 26

Wired around the water Heater

Question 27

What are 2 types of plug fuses ?

Answer 27

°Edision base | °Type s

Question 28

On a temporary service , all parts ,must be ?

Answer 28

Weatherproof

Question 29

What is the bonding screw or clamp used for ?

Answer 29

Bonding the panel to the ground

Question 30

On a three way switch the common connection will connect to ?

Answer 30

Only to a power source or a load

Question 31

A SEP has a buss bar for circuit breakers and ??

Answer 31

Ground and neutral bar

Question 32

When the power company installs their three conductors from the pole to the structure there is a bare conductor , what is the bare conductor called ?

Answer 32

Messenger

Question 33

A hallway is required to have an electrical outlet If it is at least how many feet in length ?

Answer 33

10 feet

Question 34

Most residential homes have what type of a power service delivered to the SEP?

Answer 34

120V/240V single phase

Question 35

When making wire connections on a switch or receptacles the wire should loop around the screw in a

Answer 35

Clockwise direction

Question 36

A light fixture that weighs more than ___ pounds must be supported independently from the box

Answer 36

50 pounds

Question 37

The ground bar in the SEP must be grounded to earth by connecting it to ?

Answer 37

A grounding electrode in contact with earth

Question 38

A GFCI will trip on a ?

Answer 38

5 milliamp current unbalance

Question 39

The minimum length of a ground rod is

Answer 39

8 ft

Question 40

When driving a ground rod , and rock bottom is encountered before the rod can be driven to its full length , the rod can be laid in a trench that is at least ?

Answer 40

2 1/2 ft

Question 41

In a switch loop circuit the white wire leading to the switch is ?

Answer 41

A hot conductor

Question 42

Under construction is considered a ?

Answer 42

Dry location

Question 43

What is the minimum number of a small appliance circuits you can use in a dwelling unit is ?

Answer 43

No maximum

Question 44

Construction specifications for non-metallic sheathed cable are the copper conductor sizes shall be ?

Answer 44

14 through 2

Question 45

Construction specifications for non-metallic sheathed cable are the aluminum conductor sizes shall be ?

Answer 45

12 through 2

Question 46

When installing Romex no bend should have a radius less than ?

Answer 46

5 times the diameter

Question 47

The largest stranded carriage fuse rating is

Answer 47

6000 amps

Question 48

Boring holes in the wood members and mounting the boxes is called

Answer 48

Roughing in