This engineering Volts & Load Analyzer tool is designed to calculate Potential Difference (Voltage), Voltage Drop, and Recommended Cable Sizing for electrical circuits.

It supports both Single-Phase (1Ø) and Three-Phase (3Ø) systems and accounts for conductor material properties (Copper vs. Aluminum).

:root {
–primary-orange: #FF8C00;
–dark-grey: #2f3640;
–bg-white: #ffffff;
–border-color: #dcdde1;
–safety-green: #27ae60;
–error-red: #e74c3c;
–cable-blue: #0984e3;
}

body { font-family: ‘Segoe UI’, Arial, sans-serif; background: #f4f7f6; padding: 20px; color: #2d3436; }

.main-card {
max-width: 1000px;
margin: 0 auto;
background: var(–bg-white);
border-radius: 12px;
box-shadow: 0 12px 30px rgba(0,0,0,0.1);
overflow: hidden;
}

.header-banner {
background: var(–primary-orange);
color: white;
padding: 30px;
text-align: center;
}

.header-banner h1 { margin: 0; text-transform: uppercase; letter-spacing: 2px; font-size: 1.5rem; }

.content-body { padding: 35px; }

.input-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
gap: 15px;
margin-bottom: 25px;
}

.form-group label {
display: block;
font-weight: 700;
margin-bottom: 8px;
font-size: 0.75rem;
color: #636e72;
text-transform: uppercase;
}

.form-group input, .form-group select {
width: 100%;
padding: 10px;
border: 2px solid var(–border-color);
border-radius: 6px;
font-size: 0.95rem;
box-sizing: border-box;
}

.form-group input:focus { border-color: var(–primary-orange); outline: none; }

.action-btns { display: flex; gap: 15px; margin-bottom: 30px; }
.btn { flex: 1; padding: 15px; border: none; border-radius: 6px; font-weight: bold; cursor: pointer; text-transform: uppercase; transition: 0.3s; }
.btn-calc { background: var(–primary-orange); color: white; }
.btn-pdf { background: var(–dark-grey); color: white; }

#report-section { background: #fafafa; padding: 25px; border-radius: 10px; border: 1px solid #eee; }

.report-flex { display: flex; flex-wrap: wrap; justify-content: space-around; align-items: flex-start; gap: 20px; }

.result-box { text-align: center; min-width: 300px; flex: 1; }
.val-large { font-size: 3rem; color: var(–primary-orange); font-weight: 800; margin: 10px 0; }

.alert-box {
margin-top: 20px;
padding: 15px;
border-radius: 6px;
text-align: left;
font-size: 0.9rem;
}

.alert-blue { background: #e1f5fe; border-left: 5px solid var(–cable-blue); color: #01579b; }
.alert-warning { background: #fff3e0; border-left: 5px solid var(–primary-orange); color: #e65100; }
.alert-danger { background: #ffebee; border-left: 5px solid var(–error-red); color: #b71c1c; }

.chart-container { width: 280px; height: 280px; }

/* Engineering Disclaimer Style */
.engineering-disclaimer {
margin-top: 40px;
padding: 20px;
background: #fff5f5;
border: 1px dashed var(–error-red);
border-radius: 8px;
color: #2d3436;
}

.engineering-disclaimer h4 {
color: var(–error-red);
margin-top: 0;
display: flex;
align-items: center;
gap: 10px;
}

.hidden { display: none; }

let myChart;

function toggleInputs() {
const phase = document.getElementById(‘phase’).value;
document.getElementById(‘pfInput’).classList.toggle(‘hidden’, phase === ‘1’);
}

function getCableData(amps, mat) {
// Simple Ampacity/Resistivity lookup
const factor = (mat === ‘Al’) ? 1.6 : 1.0;
if (amps <= 11) return { size: "1.0 mm²", res: 18.1 * factor };
if (amps <= 14) return { size: "1.5 mm²", res: 12.1 * factor };
if (amps <= 19) return { size: "2.5 mm²", res: 7.41 * factor };
if (amps <= 26) return { size: "4.0 mm²", res: 4.61 * factor };
if (amps <= 34) return { size: "6.0 mm²", res: 3.08 * factor };
if (amps <= 46) return { size: "10.0 mm²", res: 1.83 * factor };
return { size: "16.0 mm²", res: 1.15 * factor };
}

function runAnalysis() {
const phase = document.getElementById('phase').value;
const mat = document.getElementById('material').value;
const A = parseFloat(document.getElementById('amps').value);
const P = parseFloat(document.getElementById('watts').value);
const L = parseFloat(document.getElementById('length').value) || 0;

if (!A || !P) { alert("Please provide Amps and Watts."); return; }

let V = 0;
if (phase === '1') {
V = P / A;
} else {
const PF = parseFloat(document.getElementById('pf').value) || 0.85;
V = P / (A * Math.sqrt(3) * PF);
}

document.getElementById('nomV').innerText = V.toFixed(2) + " V";

const cable = getCableData(A, mat);
const dropFactor = (phase === '1') ? 2 : Math.sqrt(3);
const voltDrop = (dropFactor * L * A * cable.res) / 1000;
const dropPercent = (voltDrop / V) * 100;

const dropBox = document.getElementById('dropResult');
const dropText = document.getElementById('dropText');

dropText.innerHTML = `Voltage Drop: ${voltDrop.toFixed(2)}V (${dropPercent.toFixed(2)}%)`;

if (dropPercent > 5) {
dropBox.className = “alert-box alert-danger”;
dropText.innerHTML += “
Danger: Excessive drop detected!”;
} else if (dropPercent > 3) {
dropBox.className = “alert-box alert-warning”;
dropText.innerHTML += “
Warning: Drop exceeds lighting standards.”;
} else {
dropBox.className = “alert-box alert-blue”;
}

document.getElementById(‘cableText’).innerText = `${mat} Cable: ${cable.size} recommended.`;

updateChart(A, P/100, V);
}

function updateChart(a, p, v) {
const ctx = document.getElementById(‘pieChart’).getContext(‘2d’);
if (myChart) myChart.destroy();
myChart = new Chart(ctx, {
type: ‘pie’,
data: {
labels: [‘Amps (A)’, ‘Power (W/100)’, ‘Voltage (V)’],
datasets: [{
data: [a, p, v],
backgroundColor: [‘#2f3640’, ‘#bdc3c7’, ‘#FF8C00’]
}]
}
});
}

function generatePDF() {
const element = document.getElementById(‘pdf-content’);
html2pdf().from(element).set({
margin: 0.3,
filename: ‘Electrical_Analyzer_Report.pdf’,
html2canvas: { scale: 2 },
jsPDF: { unit: ‘in’, format: ‘a4’, orientation: ‘portrait’ }
}).save();
}

window.onload = () => updateChart(0,0,0);

Step-by-Step Instructions

Step 1: Select Phase System

• Choose 1-Phase (Single) for residential loads or small appliances.
• Choose 3-Phase (Balanced) for industrial motors, HVAC equipment, or heavy machinery.

Step 2: Input Electrical Parameters

• Current (Amps): Enter the measured or design current of the circuit.
• Power (Watts): Enter the total active power of the connected load.
• Cable Length (Meters): Enter the one-way distance from the power source to the load.

Step 3: Define Material & Power Factor

• Select Copper (Cu) or Aluminum (Al). Note: Aluminum typically requires a larger cross-section for the same current.
• For 3-Phase, enter the Power Factor (cos φ). The industry standard is usually 0.85.

Step 4: Analyze & Export

• Click “Run Full Analysis” to generate the results and the distribution pie chart.
• Click “Export PDF Report” to save a formal technical summary for your project documentation.

Read More – Air terminal Size calculator