Fuses + RCCB

Question 1

What is a fuse?

Answer 1

• A fuse is a component that protects an appliance/ other components.

Question 2

What does a fuse have in it?
Why?

Answer 2

• A very thin wire that melts when too high of a current passes through - breaking the circuit

Question 3

What is an RCCB?

Answer 3

• A mechanical fuse used in homes.

Question 4

Give 2 advantages of an RCCB.

AND 1 disadvantage

Answer 4

• Switches off quicker
• Can repair easily
• Not very reliable

Question 5

Give an advantage and disadvantage of a fuse.

Answer 5

• More reliable
• Needs replacing

Question 6

What is meant by a fuse size?

Answer 6

• This is the current value where the fuse will cut off the circuit.

Question 7

How much higher than the operating current do you want your fuse value?

Answer 7

• You want fuse value SLIGHTLY above operating current.

Question 8

Give the 4 MAIN fuse sizes.

Answer 8

1A
3A
5A
13A