Physics GCSE
double insulation
What double insulation means in Physics GCSE, as defined for AQA.
Definition of double insulation
Check what you remember
Read the wording for your board, then hide it and explain double insulation in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
An appliance with a plastic case, such as a hairdryer or a phone charger, uses a two-core cable because a plastic case cannot become live even if a wire works loose inside.
Topics that use double insulation
- Mains electricity (AQA GCSE)
Related terms
- conductors and insulators
- earth wire
- equal current
- fault current
- live neutral earth
- live to earth connection
- low resistance path
- metal case
Using double insulation in the exam
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