Safety Devices Flashcards
0
Q
How does a fuse work?
A
Too much current, it gets hot and melts to open circuit
1
Q
What are the parts in a fuse?
A
Metal strip in a tube
2
Q
How to reset a fuse?
A
Replace it
3
Q
How does a circuit breaker work?
A
Strip gets hot and the 2 metals expand in different rates. Strip bends and opens switch
4
Q
What are the parts in a circuit breaker?
A
2 metal strips
5
Q
How to reset a circuit breaker?
A
Flip the switch in the breaker box
6
Q
What are the parts in a Ground Fault Interrupter (GFI)?
A
2 current sensors (ammeters)
7
Q
How does a Ground Fault Interrupter (GFI) work?
A
One meter on each side of the switch. If the currents are different, the switch opens
8
Q
How to reset a Ground Fault Interrupter (GFI)?
A
Press the reset button
