Key Facts Summary
Part of Mains Electricity & Safety · GCSE GCSE Physics revision
This key facts covers Key Facts Summary within Mains Electricity & Safety for GCSE Physics. Revise Mains Electricity & Safety in Electricity for GCSE Physics with 18 exam-style questions and 30 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 16 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 16
Practice
18 questions
Recall
30 flashcards
📋 Key Facts Summary
- UK mains: 230 V AC, 50 Hz
- Live wire: brown — carries alternating voltage
- Neutral wire: blue — returns to supply at ~0 V
- Earth wire: green and yellow — safety wire, normally no current
- Fuse on the live wire (to cut the dangerous wire)
- Choose fuse just above normal operating current
- Double insulation: plastic case, no earth wire needed
- Circuit breaker: can be reset; fuse must be replaced
Keep building this topic
Read this section alongside the surrounding pages in Mains Electricity & Safety. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Mains Electricity & Safety
What does AC stand for, and how does it differ from DC?
Explain how a fuse protects an electrical circuit from damage.
Quick Recall Flashcards
18 questions on Mains Electricity & Safety — practise free
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