Fuses, ratings and choosing cable
Physics · Grade 10 · about 40 minutes
A fuse is a deliberate weak link on the live wire; choose its rating just above the working current, and match the cable thickness to that current.
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Other lessons in this sub-strand
- Current, voltage and resistance
- Ohm's law, resistivity and resistor codes
- Resistor networks, power and heating
- Circuit symbols and drawing circuits
- Measuring current with an ammeter
- Measuring potential difference
- Verifying Ohm's law
- Factors affecting the resistance of a wire
- Measuring the resistivity of a wire
- Determining e.m.f. and internal resistance
- Laws of current and voltage in a circuit
- Series circuits
- Parallel circuits
- Mixed networks and voltage dividers
- Electrical energy and the kilowatt-hour
- Heating effect of an electric current
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- Kenya domestic wiring and electrical safety