Apply temperature correction and grouping factors to cable base ampacity per NEC Table 310.16 and IEC 60364-5-52. Instant adequacy check against design load current.
Apply temperature correction and grouping/bundling factors to cable base ampacity. Base values from NEC Table 310.16 (60/75/90°C ratings, copper and aluminium). Temperature correction per NEC Table 310.15(B)(1) (30°C base) or IEC 60364-5-52 (40°C base). Grouping factors per NEC Table 310.15(C)(1) or IEC B.52.17. Supports conduit, cable tray, and direct burial installation methods.
// INPUTS
// Results update automatically as you type
// CABLE BASE AMPACITY
// DERATING CONDITIONS
Reference: 30°C (NEC) / 40°C (IEC, varies)
Neutral counts if carrying unbalanced load (NEC)
Enter manufacturer nameplate ampacity if known
Actual current the cable needs to carry
Base Ampacity (table)—A
Temperature Correction Factor—
Grouping / Bundling Factor—
Derated Ampacity—A
Design Load Current—A
Status—
Disclaimer: For reference and preliminary estimation only. Verify results against the applicable code, project specification, and equipment data before use in design documents.
Please check inputs.
// RELATED TOOL
CableSched-LMX
Full cable schedule generator — automates ampacity checks, voltage drop across all circuits, and routing references at project scale.