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Ampacity Reference Helper
Reference-only lookup for typical current-carrying capacity values. Use this for orientation, then validate against current standards and project-specific constraints.
Reference only — derating, installation method, and BS 7671 compliance checks are explicitly out of scope. Consult current standards before specifying cable sizes.
Metric UK mm² ladder.
Result
Reference only — consult current standards.
Reference only — consult current standards.
How this table was built
Results are read from src/data/ampacity-reference.json and returned without interpolation. Each row is informational and tied to one reference condition.
- Lookup table only. No interpolation or thermal modelling is applied.
- Derating factors (installation method, grouping, ambient, insulation) are out of scope.
- Consult current standards and project documents before selecting cable sizes.
- This helper does not perform BS 7671 compliance checks.
Formula version: 0.1.0 · Data version: 0.1.0-skeleton
Why we don't compute derating
Derating depends on installation method, grouping, insulation type, ambient conditions, and standard-specific tables. This helper stays non-prescriptive and points you back to the governing standards.
Review methodology and disclaimer, or continue with voltage drop.