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Max Wire Length Solver

Back-solve allowable one-way length from drop budget, with gauge picker and feet+meters results. 7 inputs, 3 outputs with grouped results.

Inputs

Budget

Budget, e.g. 3 branch, 5 total.

Nominal volts.

Current on the run.

Circuit

Drop factor.

Conductor

Pick the gauge off the reel; properties come from the NEC Chapter 9 Table 8 dataset.

Conductor material

Copper K = 12.9, aluminum K = 21.2 equivalent via dataset resistance.

Sets representative reactance.

Result

Allowed volts
Waiting for calculation.
Max one-way length
Waiting for calculation.
Same in meters
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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DC Voltage Drop Calculator

NEC Table 8 resistance drop for 24V DC control runs with gauge picker, material and limit verdict. 9 inputs, 5 outputs with grouped results.

Outputs: Voltage drop · Drop percent · Voltage at load

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Workspace

Keep the assumptions with the result.

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