Fuses + RCCB Flashcards
1
Q
What is a fuse?
A
- A fuse is a component that protects an appliance/ other components.
2
Q
What does a fuse have in it?
Why?
A
- A very thin wire that melts when too high of a current passes through - breaking the circuit
3
Q
What is an RCCB?
A
- A mechanical fuse used in homes.
4
Q
Give 2 advantages of an RCCB.
AND 1 disadvantage
A
- Switches off quicker
- Can repair easily
- Not very reliable
5
Q
Give an advantage and disadvantage of a fuse.
A
- More reliable
- Needs replacing
6
Q
What is meant by a fuse size?
A
- This is the current value where the fuse will cut off the circuit.
7
Q
How much higher than the operating current do you want your fuse value?
A
- You want fuse value SLIGHTLY above operating current.
8
Q
Give the 4 MAIN fuse sizes.
A
1A
3A
5A
13A
