mains electricity

Question 1

what type of current in the mains in uk?

Answer 1

mains electricity is ac

Question 2

what type of cable are most appliances connected to mains supply by?

Answer 2

three-core cables

Question 3

what are wires made of and why?

Answer 3

copper because they are good electric conductors

Question 4

what is the brown wire called?

Answer 4

live wire

Question 5

what is the job of live wire?

Answer 5

to carry alternating potential difference from supply

Question 6

what is the potential difference of live wire?

Answer 6

230 volts

Question 7

what is the blue wire called?

Answer 7

neutral wire

Question 8

what is the job of neutral wire?

Answer 8

to complete circuit

Question 9

what is the potential difference of neutral wire?

Answer 9

around 0 volts

Question 10

what is the green and yellow wire?

Answer 10

earth wire

Question 11

what is the job of earth wire?

Answer 11

safety wire to stop appliance becoming live

Question 12

what is the downside to earth wires?

Answer 12

dangerous and could be fatal if touched