Electrical

Question 0

How many wire are there from the street into a house In a 240 volt system?

Answer 0

Three wires

Question 1

What determines the amount of electricity ( amperage) a wire can carry ?

Answer 1

Size( diameter)

Question 2

The size of the fuses or breakers at the main disconnect will always tell you how much electricity is available to the house ?T/F

Answer 2

False

Question 3

What Size service wire (minimum ) would be required to provide a house with 60 amp service ?

Answer 3

6 Cu

Question 4

How is the electrical system in most older homes grounded?

Answer 4

Water supply piping

Question 5

The ground wire should always be clamped upstream of the water Meter? T/F

Answer 5

True

Question 6

How are the electrical systems grounded in rural properties where the well supply piping into the house is plastic?

Answer 6

Ground rods

Metal well casing

Question 7

Breakers are safer than fuses . Any house with fuses should be upgraded to breakers. T/F

Answer 7

False

Question 8

Fuses are more prone to be improperly sized and overloaded.

T/F

Answer 8

True

Question 9

What is/are the most common reason for replacement of knob-and- tube wiring ?

Answer 9

• Breakdown of the cloth covering(insulation)
• buried in thermal insulation
• homeowner splices and repairs

Question 10

Name an important improvement between knob-and-tube wiring and modern cable

Answer 10

Use of grounding

Question 11

Where are GFCI’s required in newer houses ?

Answer 11

Kitchen counters
Bathrooms
Unfinished basements
Outdoors

Question 12

In most cases,three distribution wires connected to one fuse or breaker is acceptable. T/F

Answer 12

False

Question 13

What is the most common electrical flaw found residentially?

Answer 13

Over fusing

Question 14

A non- grounded receptacle within 6” of water should be replaced with?

Answer 14

GFCI
GFCI upstream from receptacle
Single pole GFCI breaker

Question 15

Maximum number if disconnects to shut off the main panel is/are?

Answer 15

Six

Question 16

What is the correct Cu wire size for a 20 amp breaker ?

Answer 16

12

Question 17

Non- metallic sheathed cable in a attic on top of joist must be?

Answer 17

Protected within 6 feet of scuttle

Must be fastened every 4 1/2 feet

Question 18

Clothes closet -bulb ok or not ok-new construction?

Answer 18

• Surface-mounted or recessed incandescent fixtures with completely enclosed lamps
• surface- mounted or recessed fluorescent fixtures
• surface-mounted incandescent fixtures can be mounted in ceiling with 12” clearance

Question 19

Sub panel requirements

Answer 19

• Neutral and ground must be separated
• must be bonded
• must be isolated

Question 20

Grounding rod must be driven?

Answer 20

8 feet

Question 21

A fused neutral (neutral wire runs to a fuse) is?

Answer 21

Unsafe

Question 22

Two- conductor wiring can be used with a GFCI ? T/F

Answer 22

True

Question 23

Does a sump Pump require a GFCI ?

Answer 23

No,if it is a dedicated receptacle

Question 24

What is the minimum required clearance in front of the main electrical panel box?

Answer 24

30” wide x 36” front

Question 25

AC cable, commonly known as BX, often contains a bare aluminum wire. Which of the following statements is true regarding the wire?

Answer 25

The wire is a bonding wire and should not be connected or brought into the interior of boxes.

Question 26

When a GFCI is installed on a two- wire non- grounded system, it provides?

Answer 26

Fault protection, but not grounding protection