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Intermediate
Automation and boards
RCDs, RCBOs and surge protection
30, 100 and 300 mA, types AC and A, voltage relays and SPDs. 7 questions.
Question 1 / 7
Why do bathrooms and socket circuits get a 30 mA RCD rather than a 100 mA one?
30 mA trips faster on a short circuit
100 mA does not work on single phase
30 mA is the threshold below which the current does not become lethal to a person
A 30 mA device takes less room in the board
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