The Solar Cable DC Resistance & Max Ampacity Safety Sizer computes proportional ratios, geometric root metrics, and balance percentages for photovoltaic DC wiring configurations.

### Mathematical Evaluation & Formulas The tool computes three direct output metrics from three numeric inputs (V1, V2, and V3): - Conductor Ratio Quotient: Evaluates the product of parameter 1 and parameter 2 scaled by divisor parameter 3: (V1 * V2) / max(0.01, V3) - Root Product Scale Metric: Determines the geometric mean product of parameters 1 and 2: sqrt(max(0, V1 * V2)) - Proportional Distribution Rating: Evaluates the share of parameter 1 relative to the sum of the first two parameters: min(100, max(0, (V1 / (V1 + V2)) * 100%))

Note on Field PV Wiring: In utility and residential solar installations governed by National Electrical Code (NEC) Article 690, conductor selection depends on copper resistivity, two-way loop distance, conduit fill factors, and rooftop thermal derating. This interactive calculator performs the specific 3-variable engineering arithmetic shown above.

### Numerical Calculation Example Testing cable parameters with V1 = 50 (circuit distance factor), V2 = 12 (amperage factor), and V3 = 4 (conductor gauge divisor): - Conductor Ratio Quotient: (50 * 12) / 4 = 600 / 4 = 150.00 - Root Product Metric: sqrt(50 * 12) = sqrt(600) ≈ 24.49 - Proportional Distribution: (50 / (50 + 12)) * 100% = (50 / 62) * 100% ≈ 80.65%

### In-Browser Execution Guarantee Calculations run entirely on-device via client-side JavaScript. No solar wiring specifications or project plans are sent over the internet.