AS/NZS 3000:2018
Table 5.1, copper
Minimum earthing conductor size by active conductor size
The loop impedance and cable size tools read the smallest earthing conductor for the active conductor size. The earth size feeds straight back into the loop impedance sum.
Na-verify: binasa laban sa naka-print na standard, mga pahina 278–279. Na-check noong 27 Sept 2026.
Mga unit: Active mm², Earth mm²
Ito ang mga value na ine-encode ng AmpSize. Walang text ng standard na inilalathala. I-verify laban sa kasalukuyang standard.
20 na row
| Active (mm²) | Earth (mm²) |
|---|---|
| 1 | 1 |
| 1.5 | 1.5 |
| 2.5 | 2.5 |
| 4 | 2.5 |
| 6 | 2.5 |
| 10 | 4 |
| 16 | 6 |
| 25 | 6 |
| 35 | 10 |
| 50 | 16 |
| 70 | 25 |
| 95 | 25 |
| 120 | 35 |
| 150 | 50 |
| 185 | 70 |
| 240 | 95 |
| 300 | 120 |
| 400 | 120 |
| 500 | 120 |
| 630 | 120 |
Mga tool na bumabasa nito (7)
Mga guide at learn page na nagbabanggit nito (15)
- Lighting circuit loop impedance, B curve 10 A
- Maximum Zs for a 16 A curve C breaker
- What size cable for a 22 kW EV charger?
- What size cable for a lighting circuit in NZ?
- What size cable for power points in Australia?
- What size cable for power points in NZ?
- Max cable length for a 20 A C curve subcircuit
- Fault level at a sub‑board, 300 kVA transformer
- Shed earthing on a 16 mm² submain
- What size breaker for 4 mm² cable
- AmpSize vs jCalc vs free cable sizing tools
- AS/NZS 3000 Table 8.1: max Zs by curve and rating
- Earth fault loop impedance and maximum Zs
- Checking an existing circuit
- Prospective fault current at a board