USING ELECTRICITY Behind The Wall

Question 0

What do min fuses do?

Answer 0

Protect the mains wiring from overheating and causing a fire if too large a current is drawn.

Question 1

Is household wiring in parallel or series?

Answer 1

Parallel so that each receives full supply voltage and so if one is switched off the rest stays on.

Question 2

Where are the mains fuses found?

Answer 2

Fuse box

Question 3

What are circuit breakers?

Answer 3

Automatic switches which trigger when too large a current is drawn.

Question 4

What is a kilowatt hour?

Answer 4

A unit of energy.

Question 5

1kwH=

Answer 5

1kw for one hour

Question 6

Are ring circuits parallel or series?

Answer 6

Parallel

Question 7

What are advantages of ring circuits?

Answer 7

Less current in each wire as there is more than one path
Thinner cable can be use since there is shared current
Less risk of ever heating as there is smaller current

Question 8

What are the differences between power and lightning circuits?

Answer 8

Lighting Sockets

Simple parallel Ring
5A max 30A max
Thin cable Thick cables

Question 9

What are advantages of circuit breakers?

Answer 9

They can be reset

Question 10

How do you convert kilowatt hours into joules?

Answer 10

Change kilowatts into watts and hours into seconds then p=et

Question 11

What is the national grid?

Answer 11

The service that gives electricity to homes

Question 12

is the lighting circuit in series or parallel?

Answer 12

Parallels

Question 13

What size of fuse does the lighting circuit have?

Answer 13

5A

Question 14

What size of fuse does the ring main circuit have?

Answer 14

30A