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Explain whether the RCCB in Figure 2 would trip if a Live to Neutral fault
occurs.

Ask by Cummings Goodwin. in Singapore
Dec 09,2024

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Tutor-Verified Answer

Answer

The RCCB would trip in a Live to Neutral fault because it detects and trips on current imbalances between the live and neutral conductors.

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The Deep Dive

The RCCB (Residual Current Circuit Breaker) is designed to detect imbalances between live and neutral currents. In the event of a Live to Neutral fault, where current flows directly from the live wire to neutral, the RCCB would not trip, as the current would be balanced, causing no differential current to be detected. It’s like a tightrope walker maintaining balance—if they don’t wobble, they don’t fall!
However, remember that if the fault leads to a leakage current (for example, if a person comes into contact with the live wire), the RCCB will trip to protect against electric shock. So, while a direct Live to Neutral short won’t trigger it, dangerous situations that create imbalance will certainly set it off!

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