What voltage is the standard requirement for portable electrical tools on UK construction sites?

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Multiple choice — select the best answer

A110 volts
B240 volts
C415 volts
D12 volts

✓ Correct answer: A. 110 volts 110 volts centre-tapped to earth (55V to earth) is the standard for portable tools on construction sites as it significantly reduces the risk of fatal electric shock.

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