We recently grabbed some plugs in Mr. Cavers' class to do a little bit of DIY and learn how to wire them. So, with our handy colour code, the girls and boys got stuck in and started taking their plugs apart.
We learned that the fuses in the plugs protect the flexes (or cables) from overheating and got to take a closer look at the thin piece of wire that comprises the fuse, helping us to understand how it "blows" when too large of a current passes through it. We also learned how to select the correct fuse for an appliance by checking its power rating. The power rating also determines the size of the cable we must use, as it needs to be large enough to avoid overheating.
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| This the face of concentration (I think). |
Later, we learned about the Earth wire, a safety device which enables electricity to flow straight to the ground if a fault develops, saving us an electric shock! However, appliances with plastic casings are "double-insulated" and present no risk of electrocution. We also brushed up on our electrical safety by discussing potentially dangerous situations that could occur. Mr. Cavers was on hand when the going got tough and gave everyone demonstrations for the trickier sections.
As time went by, the students became more confident in their capabilities and carried on mostly independently, focusing intently on their work, as you can see below.
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