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How quickly should a RCD trip?

Sarah Allen


AS/NZS 3760:2010 specifies the maximum “trip time” a RCD must switch off the power to the circuit along with the recommended frequency of testing.

Type 1 RCD’s shall trip at no greater than 40 milliseconds at a test current of 10mA a.c.

Type 2 RCD’s shall trip at no greater than 300 milliseconds at a test current of 30mA a.c.