More cards in this set

Why is the outer cover of a three-pin plug made of plastic or rubber?

What re the pins of a plug made of and why?

Which pin is the earth wire connected to?

What is it important to check on a plug?

What is missing from a two-core cable?

Why don't some appliances need an earth?

How is an appliance with a metal case earthed?

Why do cables come in different thicknesses?

Why are the pins of a plug made of brass?

Why must appliances with metal cases be earthed?