double insulation
What double insulation means in Combined Science GCSE, as defined for AQA.
Definitions of double insulation
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Reference: AQA
A measure that avoids the need for an earth connection and can reduce the risk by preventing a person from becoming the path to earth.
Appliances with plastic cases are often double insulated and need no earth connection.
Topics that use double insulation
- Mains electricity (AQA GCSE)
Related terms
- colour code
- Earth wire
- Electrical safety
- Function and placement of switches
- fuse
- Fuses and circuit breakers
- Insulation
- Isolation from the supply
Using double insulation in the exam
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