4.4 — Electrical safety

Core

• 4.4.1 — State hazards of damaged insulation, overheating cables, damp conditions, and overloading sockets
• 4.4.2 — Know that mains circuits have live, neutral and earth wires; explain why switches must be on live wire
• 4.4.3 — Explain the use and operation of trip switches and fuses
• 4.4.4 — Explain why appliance casings must be earthed or double-insulated
• 4.4.5 — State that appliances without an earth wire rely on fuses to protect the circuit and cabling