AS/NZS 3008.1.2:2017
Table 2
Reduction factors for harmonic currents in 4- and 5‑core cables
The correction factors tool reads the reduction factor for third harmonic current in a four‑core or five-core cable. Above 33 %, it sizes on the neutral current. The harmonics tool reads the same band from a spectrum.
Verified: read against the printed standard, pages 27–28. Checked 24 Sept 2026.
Units: Third harmonic percent %, Factor x
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
4 rows
| Band | Min percent | Max percent | Factor (x) | Basis |
|---|---|---|---|---|
| 0–15 % | 0 | 15 | 1 | phase |
| 15–33 % | 15 | 33 | 0.86 | phase |
| 33–45 % | 33 | 45 | 0.86 | neutral |
| > 45 % | 45 | 1 | neutral |