Cabling

Cards (11)

How many types of wire are there?
3
What colour is the live wire?
Brown
What colour is the neutral wire?
Blue
What colour is the earth wire?
Green and Yellow strips
What is the potential difference of the live wire?
230V
What is the potential difference of the neutral wire?
0V
What is the potential difference of the earth wire?
0V, only carries a current if there's a fault
What is the function of the live wire?
Carries the alternating potential difference from the supply
What is the function of the neutral wire?
Completes the circuit
What is the function of the earth wire?
Safety wire to stop the appliance becoming live, connected to the earth and to the casing
Why is the live wire dangerous?
Even if mains circuit is off, current may still be flowing through it