Electrical safety in the home
Physics · Key Stage 2 · The School
Why water makes electricity dangerous
Pure water barely conducts electricity. But real water is different. Tap water, bath water and spilled water all carry dissolved minerals. Those minerals DO conduct. Wet skin conducts far better than dry skin too. That is why a plug socket is never used near a bath or a sink. Wet hands should never touch an electrical switch or socket either.
Safe habits around plugs and sockets
A socket should never be overloaded with too many plugs at once. A damaged cable should be reported and never used. Wire should never be left showing through its covering. Pulling a plug out by its cable can damage it. Always pull by the plug itself instead. That kind of damage often stays invisible until the cable fails later. None of these rules exist for no reason. Each one prevents a real, specific danger.
What a fuse actually does
A FUSE is a thin piece of wire. It is designed to melt on purpose. It melts if too much current flows through it, far more than the appliance actually needs. This is not a fault. It is the fuse doing its job. Melting protects the wiring and the appliance from overheating, and it can stop a fire before it starts.
A hairdryer plugged in near a bath is genuinely dangerous. That is true even if the hairdryer is switched off at the wall. Imagine it falls into the water while still connected. The water carries dissolved minerals. Those minerals would conduct electricity through anyone touching it. This is exactly why bathroom sockets sit well away from any water source. It is also why bathroom light switches are usually a pull-cord. A pull-cord can be used safely without touching a switch with a wet hand.