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4.4 Electrical safety

Syllabus
0625–2026–2027
Topic
4.4
Level
—

4.4.1—Hazards of: (a) damaged insulation (b)

  • State the hazards of: (a) damaged insulation (b) overheating cables (c) damp conditions (d) excess current from overloading of plugs, extension leads, single and multiple sockets when using a mains supply

4.4.2—A mains circuit consists of a live

  • Know: a mains circuit consists of a live wire (line wire), a neutral wire and an earth wire and explain why a switch must be connected to the live wire for the circuit to be switched off safely

4.4.3—Use and operation of trip switches and

  • Explain the use and operation of trip switches and fuses and choose appropriate fuse ratings and trip switch settings

4.4.4—Why the outer casing of an electrical

  • Explain why the outer casing of an electrical appliance must be either non-conducting (double-insulated) or earthed

4.4.5—A fuse without an earth wire protects

  • State: a fuse without an earth wire protects the circuit and the cabling for a double- insulated appliance

Objective notes

5 learning objectives
ConceptIGCSE Physics