Residual Current Device, an electrical safety device that quickly breaks an electrical circuit to prevent serious harm from electric shock.
Acronym from 'Residual Current Device'. The technology was developed in the 1960s as electrical safety became a priority in homes and workplaces.
RCDs save thousands of lives annually by detecting tiny imbalances in electrical current - as little as 30 milliamps - that indicate electricity is leaking where it shouldn't, potentially through a human body.
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