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These are representative values; refer to the latest AS/NZS 3000 for exact figures. The base table value is not the final allowable current in most installations. Derating factors must be applied:
| Factor Type | AS/NZS 3000 Clause | Example | |-------------|--------------------|---------| | (e.g., >30°C air) | 3.5.3.1.1 (Table 3.5.3.1.1) | At 40°C, factor = 0.87 for PVC | | Grouping (multiple circuits) | 3.5.3.1.2 (Table 3.5.3.1.2) | 4 circuits touching, factor = 0.68 | | Thermal insulation (cable buried in insulation) | 3.5.3.1.3 | Factor = 0.50 to 0.70 | | Soil thermal resistivity (buried cables) | 3.5.3.1.4 | Factor = 0.85 to 1.0 | as3000 current carrying capacity table
| Typical Table Reference | Description | |------------------------|-------------| | | Single-core cables, copper, V-75/PVC insulation, clipped direct (Method C). | | 3.5.3.1 (ii) | Multi-core cables, copper, V-90/XLPE, in conduit (Method B). | | 3.5.3.2 | Current capacities for aluminium conductors (derated from copper values). | | 3.5.3.3 | Capacities for flexible cords (e.g., AS/NZS 3191). | Note: Always use the table corresponding to the installation method (Table 3.4) first, then find the current capacity. 5. Example Extract (Illustrative – Single-core Copper, 90°C XLPE, Clipped Direct) | Conductor Cross-section (mm²) | Current Carrying Capacity (A) | |-------------------------------|-------------------------------| | 1.0 | 15 | | 1.5 | 19 | | 2.5 | 26 | | 4.0 | 34 | | 6.0 | 43 | | 10.0 | 59 | | 16.0 | 79 | | 25.0 | 104 | These are representative values; refer to the latest
