Fuses & Earthing Flashcards
what is a fuse?
a thin wire which melts and breaks the circuit when the current is too high.
why should the rating of a fuse be a few amps above the recommended current for the appliance?
so that it won’t break under normal use. However, if there is a surge and the current rises significantly then it will surpass the rating and break the fuse.
how do earth wires protect us from electric shocks?
The earth wire is connected to the casing of the appliance.
If the live wire touches the appliance casing, the earth wire provides an alternative pathway for electricity to flow.
This way, we don’t get an electric shock from touching the live appliance casing.
what is the rating of a fuse?
The rating of a fuse is the current that will cause the fuse to break the circuit.
