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Wire Ampacity Calculator

Dataset ampacity with temperature-rating picker, bundling derate, continuous limit and gauge verdict. 4 inputs, 3 outputs with grouped results.

Inputs

Conductor

Copper conductor.

Use the lowest termination rating.

Conditions

Bundled count for 310.15(C)(1).

Above 30C needs correction; verify with Table 310.15(B)(1).

Result

Table ampacity
Waiting for calculation.
After bundling
Waiting for calculation.
Max continuous load
Waiting for calculation.
Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

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Workspace

Keep the assumptions with the result.

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