TRANSFORMERS AND NATIONAL GRIDS
2 marks · NormalGive two reasons why high voltages are dangerous in the National Grid and must be reduced before entering homes.
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High voltages can cause fatal electric shocks and can damage electrical appliances.
Also accept: High voltages can cause fires or harm people.; They may cause insulation breakdown.
Common mistakes: Just stating 'dangerous' with no reason
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Marking points
B1 · 1 mark · Reference to lethal (or severe) electric shocks or risk to people.
B2 · 1 mark · Reference to danger to appliances, insulation, or fire risk.
Worked solution
High voltages must be reduced before entering homes because they can: - Cause dangerous or fatal electric shocks to people - Damage or destroy household electrical appliances