Cable derating worksheet fields
Worksheet fields for recording cable derating inputs beside Australian cable sizing reviews without publishing derating factor tables.
Derating evidence needed before cable checks
List derating record fields while leaving factor selection to the governing source and project review.
| Field | Purpose | Typical source | Boundary |
|---|---|---|---|
| Base capacity source | Records where the starting ampere value came from. | Current source document or project review | This page does not publish capacity values. |
| Installation method | Ties the capacity basis to how the cable is installed. | Design note, route drawing or source document | Changing method can change the applicable value. |
| Grouping context | Records whether nearby circuits affect the review. | Cable route and schedule | No grouping factor is stated here. |
| Ambient or soil condition | Keeps environmental assumptions visible. | Project assumption or site data | Environmental correction needs governing source values. |
| Applied factor record | Shows which project-entered factors were applied. | Reviewer worksheet | Final selection still needs a documented project basis. |
- This table is a worksheet field list.
- Derating factors and final capacity decisions must come from current governing sources.
How derating fields frame project inputs
Capture the installation conditions that affect derating so the calculator result can be reviewed against the actual run and enclosure context.
| Item | Value |
|---|---|
| Purpose | List derating record fields while leaving factor selection to the governing source and project review. |
| How to use the source | Field table only; any derating arithmetic must use project-entered source values and calculator logic. |
| Standards and project context | AS/NZS 3008 context noted for project review; verify current source documents and installation conditions. |
| Where judgement is still needed | Use this table for lookup, labelling or worksheet context; do not treat it as a project-specific calculation result. |
| Before relying on it | Confirm current standards, local authority requirements, DNSP conditions, project documents and manufacturer data before relying on a decision. |
Standards basis for derating records
Keep the standards context, checked date and project condition behind each derating entry visible for review.
| Item | Value |
|---|---|
| Source | AUWiring cable-size calculator fields and AS/NZS 3008 derating-source context. |
| Source type | AUWiring field model with standards context |
| Derivation basis | AUWiring worksheet field table; derating factors and controlled source tables are not reproduced. |
| Last checked | 2026-07-13 |
| Review interval | Annual or when cable-size fields, derating source context or installation-record practice changes. |
| Review trigger | Calculator field change, standards update, installation-method change or project feedback. |
| Version used | R07-2026-07-13 |
| Australian application | Australia; project conditions, product data, route context and local authority requirements can override general notes. |