Fuses and Earthing Flashcards
1
Q
What is a surge?
A
Sudden increase in current
2
Q
How does a fuse protect from high currents?
A
A fuse is a very thin piece of wire that is connected between 2 live wires. When a high current is passed through the live wire, it has to go through the fuse as well. This causes the fuse to heat up and break as a result, which breaks the connection to the second live wire.
3
Q
How does a circuit breaker work and why are they superior to fuses.
A
They don’t have to be replaced. When the current is too high, they trip and break the circuit. But they can be reset.
4
Q
If the live wire comes lose in an appliance and starts to touch the casing, what’s the danger?
A
IF a person were to touch the casing, they would receive an electrical shock.
