AS/NZS 3000:2018
Table 8.1, maximum Zs
Maximum earth fault-loop impedance for the total circuit
The test results and test schedule tools read the highest earth fault-loop impedance for the device and its rating. The measured Zs is compared with it.
Verified: read against the printed standard, pages 427. Checked 26 Sept 2026.
Units: Rating A A, Type B Ω, Type C Ω, Type D Ω, Fuse 0.4 s Ω, Fuse 5 s Ω
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
14 rows
| Rating A | Type B (Ω) | Type C (Ω) | Type D (Ω) | Fuse 0.4 s (Ω) | Fuse 5 s (Ω) |
|---|---|---|---|---|---|
| 6 | 9.6 | 5.1 | 3.1 | 11.5 | 15.3 |
| 10 | 5.8 | 3.1 | 1.8 | 6.4 | 9.2 |
| 16 | 3.6 | 1.9 | 1.2 | 3.1 | 5 |
| 20 | 2.9 | 1.5 | 0.9 | 2.1 | 3.6 |
| 25 | 2.3 | 1.2 | 0.7 | 1.6 | 2.7 |
| 32 | 1.8 | 1 | 0.6 | 1.3 | 2.2 |
| 40 | 1.4 | 0.8 | 0.5 | 1 | 1.6 |
| 50 | 1.2 | 0.6 | 0.4 | 0.7 | 1.3 |
| 63 | 0.9 | 0.5 | 0.3 | 0.6 | 0.9 |
| 80 | 0.7 | 0.4 | 0.2 | 0.4 | 0.7 |
| 100 | 0.6 | 0.3 | 0.2 | 0.3 | 0.5 |
| 125 | 0.5 | 0.2 | 0.1 | 0.2 | 0.4 |
| 160 | 0.4 | 0.2 | 0.1 | 0.2 | 0.3 |
| 200 | 0.3 | 0.2 | 0.1 | 0.1 | 0.2 |
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