Electricity in the Home Flashcards Preview

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Flashcards in Electricity in the Home Deck (8):

List the electrical hazards in the home (9)

1) Longs cables 2) Frayed cables
3) Cables in contact with something hot or wet
4) Water near sockets 5) Shoving things onto sockets
6) Damaged plugs 7) Too many plugs in 1 socket
8) Lighting sockets without bulbs in
9) Appliances without their covers on


Explain what a three-core cable is

Connects an appliance to the mains.
Three wires, each with a core of copper and a coloured plastic coating


What are the 3 wires?

Neutral wire
Live wire
Earth wire


Describe the live wire

In a mains supply alternates between high +ve and -ve voltage


Describe the earth wire

Green and yellow.
Used to protect the wiring, and for safety - it works together with a fuse to prevent fir and shocks It's attached to the metal casing of the plug ad carries the electricity to the earth, should the live or neutral wire touch the metal case


Describe the neutral wire

Blue, always at 0 V. Electricity normally flows in and out though the live and neutral wires only


Describe how a plug is wired, including safety features (4)

1) The right coloured wire is connected to each pin and is firmly screwed in
2) No bare wires sowing inside the plug
3) Cable grip tightly fastened over the cable outer layer
4) Different appliances need different amounts of electrical energy. Thicker cables have less resistance, so they carry more current


Describe the plug including the safety features (3)

1) The metal parts are made of copper because these are very good conductors
2) The case, cable grips and cable insulation are made of rubber or plastic because they're really good insulators and flexible too
3) This all keeps the electricity flowing where it should