Which RCD trip time to record?

[spud1]

Afternoon all,

As we all know the new 18th certs only have the facility to record the x1 trip time of a circuits RCD in the test results page. They've got rid of the x5 column for some reason!?
NICEIC are recommending that where the RCD is being used for additional protection the x5 reading should be recorded and where it is being used for fault protection (e.g. TT earthed installation) the x1 reading should be recorded. But the column is called 'Operating time at 1(delta)n (ms), bit of a conflict there?

Which one do we record and why would x1 be more relevant to fault protection and x5 to additional protection?

Thanks everybody.

 

[westward10]

For a 30ma, ×5. For all others ×1. As you say ×5 on a 30ma is additional protection and the column heading should have no bias toward ×1 or ×5.

 

[Flanders]

What westward says just remember record the highest value of the 2 test you do for each side of the curve

 

[spud1]

 

[Deleted member 26818]

If the form wants you to record 1x, then that’s what you record.
The characteristics specified for an RCD when used as additional protection, is that it is 30mA.
There is no operating time specified.

When used as the sole means of fault protection, the slowest operating time should be recorded, as that is what is required to be known to ensure the requirements for ADS are satisfied.