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Understanding Home Circuit Safety

Learn about circuit safety in your home, where devices are connected in parallel, and how overloading is prevented with fuses and circuit breakers. Find out how to identify and address short circuits for a safe electrical system.

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Understanding Home Circuit Safety

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  1. Circuit Safety • In your home devices are connected in parallel. • As more devices are connected to the lines there are more pathways made for current=lowering of the combined resistance and more current occurring in the lines. • When the lines carry more than a safe amount of current they are OVERLOADED.

  2. To prevent overloading fuses are connected in series along the supply line. • This means that the current must pass through the fuse. • The fuse is constructed with a wire ribbon that will heat up and melt at a given current. • If the current is higher than the rating of the material the blown out fuse breaks the circuit. • Make sure to check what caused to blow out. • Circuits may also be protected by circuit breakers, which use magnets or bimetallic strips to open the switch.

  3. If you don’t check it you could create a short circuit because the insulation separating the wires in the circuit wears away and allows the wires to touch. • A short circuit is a circuit whose path has been shortened with less resistance. • A short circuit draws a dangerously large current because it bypasses the normal circuit resistance.

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