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A certain RCD has a rating of 30 mA - Leaving Cert Physics - Question (h) - 2017
Question (h)
A certain RCD has a rating of 30 mA. What is the significance of this number?
Worked Solution & Example Answer:A certain RCD has a rating of 30 mA - Leaving Cert Physics - Question (h) - 2017
Step 1
current is cut off
Answer
The significance of a rating of 30 mA for an RCD (Residual Current Device) indicates that the device will cut off the electrical current when it detects a leakage current of 30 mA or more. This mechanism is crucial for preventing electric shocks and protecting individuals from potential harm.
Step 2
if the difference between live and neutral currents is greater than 30 mA
Answer
Additionally, the RCD will trigger if the difference between the live and neutral currents exceeds 30 mA. This action helps to ensure that any imbalances in the current, typically caused by a fault condition, are detected and addressed quickly to maintain safety.