domestic uses and safety
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12 Terms
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what is direct voltage
current always flowing in the same direction
2
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what is alternating voltage
current constantly changing direction
3
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What is the UK mains supply?
230V
4
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function of neutral wire
Completes the circuit
5
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- blue
6
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function of live wire
Provides the alternating potential difference from the mains supply
7
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brown
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function of earth wire
A safety wire to stop the appliance becoming live
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green and yellow
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what is the potential difference between the live wire and the earth wire
0V
11
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how is a live wire dangerous even if a plug is turned off
there is still a potential difference
12
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if you made contact with the live wire your body would provide a link between the supply and the earth, so a current would flow through you
Note 
Flashcards (47)