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What is the maximum tripping time for an RCBO BSEN 61009 tested on X1?
The Functional test on an RCD must be done before using the instrument and then every 6 months
When testing Phase sequence on a 3ph DB or the load side of a motor, the correct sequence will be indicated by an arrow rotating in what direction?
The 2 way switches do not need checking for correct function as this was checked through dead testing, True of False?
Which of the following is not a functional test?