RCD trip time limit lookup

The maximum RCD trip time at rated residual current for installation verification (AS/NZS 3000 cl 8.3.10) or in-service test & tag (AS/NZS 3760 Table 2.3), by rated IΔn.

AS/NZS 3000:2018 cl 8.3.10 · AS/NZS 3760:2022 Table 2.3

What are you testing?

Rated residual current (IΔn)

Maximum trip time at IΔn (×1)

300ms

AS/NZS 3000:2018 · cl 8.3.10 (RCD operation at I∆n, 0° and 180°)

Applies to each ×1 test leg (0° and 180°).

How this is worked out

Installation verification: AS/NZS 3000:2018 cl 8.3.10 sets 300 ms at rated residual current, tested on both the 0° and 180° half-cycles.
For a 10 mA (Type I) device the tighter 40 ms figure from AS/NZS 3760:2022 Table 2.3 applies — its cl 2.4.3.4 note permits using that table for AS/NZS 3000 verification.
In-service test & tag: AS/NZS 3760 Table 2.3 publishes 40 ms for 10 mA and 300 ms for 30 mA. For other ratings it publishes no limit; a trip at IΔn confirms operation and the time is recorded.
The tool covers the ×1 (rated current) test only. Push-button and ×½ no-trip checks are recorded separately.

Common questions

Is the limit the same for Type A and Type AC RCDs?+

Yes. The trip-time limit depends on the rated residual current, not the type marking. The type is confirmed by inspection of the device marking; note that Type AC RCDs must not be installed in new work.

My meter shows two trip times — which one counts?+

Both. Meters test at 0° and 180° and each result must be within the limit.

What about the ×5 test?+

The ×5 test is not encoded in this lookup. Record the ×5 result as your meter reports it.

The mandatory verification tests AS/NZS 3000 requires before a new installation is energised — in order, dead before live — and what goes on the report.

Recording this test?

Field Efficient applies the right clause from the RCD's rated current on the mandatory test matrix and judges both trip legs as you capture them.

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Indicative only. Verify against the current edition of the standard before relying on a result for design, certification or a compliance decision. This tool is not a substitute for the standard or for a licensed electrician's judgement.