Electrical Safety

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Together, the fuse and switch control the amount of electricity that enters an appliance.

The fuse and the switch are connected to the live wire.

Electricity comes in through the live wire.

If the fuse is blown, or the switch is off, then the electricity cannot reach the appliance.

Slide 33

The Earth Wire

Plugs have 3 pins on them.

The live and neutral pins allow electricity to pass through the appliance and cause it to work.

The earth wire does nothing unless something goes wrong.

Slide 34

What can go wrong!

The most dangerous thing that can happen is that the live wire can become loose inside an appliance and touches the casing.

This makes the casing LIVE!

If you touch the LIVE casing, you could be electrocuted as you are providing a path for the electricity to flow.

Slide 35

Prevention

To prevent electrocution, the earth wire is connected to the casing of the appliance.

If the live wire touches the casing, the earth wire provides a path for the electricity to flow.

This blows the fuse and switches the appliance off, leaving you safe.

Slide 36

Fault Spotting

Slide 37

Electrical Safety Check Test

1. Name three safety devices that appliances have.

These are designed to stop you from being

and to prevent the appliance from being .

electrocuted damaged devices

2. Copy and complete the following notes filling in the blanks using words from the word bank.

Slide 38

Electrical Safety Check Test

A is a thin piece of which will when too much passes through it.

is a flow of and is measured

in (A).

3. Copy and complete the following notes filling in the blanks using words from the word bank.

current amps melt fuse wire current electricity

Slide 39

Electrical Safety Check Test

4. What 2 safety devices control the amount of electricity that enters an appliance?

5. Which wire are these 2 safety devices connected to ?

6. Which wire allows electricity to enter an appliance?

Slide 40

Electrical Safety Check Test

7. Copy and complete the following notes filling in the blanks using words from the word bank.

The and must be to the

wire to the from remaining

when the is or the appliance is