Estimated line current calculator<\/title>\n <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\" \/>\n <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin \/>\n <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap\" rel=\"stylesheet\" \/>\n <style>\n \/*\n * No Tailwind \/ no third-party CSS framework \u2014 everything is scoped to #line-current-calc-root\n * with lcc-* classes so WordPress themes cannot clash with generic names like .flex or .hidden.\n *\/\n #line-current-calc-root {\n isolation: isolate;\n line-height: 1.5;\n -webkit-font-smoothing: antialiased;\n }\n\n #line-current-calc-root,\n #line-current-calc-root *,\n #line-current-calc-root *::before,\n #line-current-calc-root *::after {\n box-sizing: border-box;\n }\n\n #line-current-calc-root .lcc-inner {\n max-width: 36rem;\n margin-left: auto;\n margin-right: auto;\n background: #fff;\n padding: 2rem 1rem 2.5rem;\n font-family: Inter, system-ui, sans-serif;\n color: #1e293b;\n }\n\n @media (min-width: 768px) {\n #line-current-calc-root .lcc-inner {\n padding-top: 2.5rem;\n padding-bottom: 2.5rem;\n }\n }\n\n #line-current-calc-root .lcc-hidden {\n display: none !important;\n }\n\n #line-current-calc-root .lcc-mono {\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n }\n\n #line-current-calc-root .lcc-strong {\n font-weight: 600;\n }\n\n #line-current-calc-root .lcc-card {\n border-radius: 1rem;\n border: 1px solid #e2e8f0;\n padding: 1.5rem;\n box-shadow: 0 1px 2px rgb(0 0 0 \/ 0.05);\n }\n\n @media (min-width: 768px) {\n #line-current-calc-root .lcc-card {\n padding: 2rem;\n }\n }\n\n #line-current-calc-root .lcc-card--params {\n background: rgb(248 250 252 \/ 0.8);\n }\n\n #line-current-calc-root .lcc-card--result {\n margin-top: 1.5rem;\n border-color: #fde68a;\n background: linear-gradient(to bottom right, #fff, rgb(255 251 235 \/ 0.35));\n box-shadow:\n 0 0 0 1px rgb(217 119 6 \/ 0.2),\n 0 8px 32px rgb(217 119 6 \/ 0.08);\n }\n\n #line-current-calc-root .lcc-title {\n margin: 0;\n font-size: 1.125rem;\n font-weight: 600;\n color: #0f172a;\n display: flex;\n align-items: center;\n gap: 0.5rem;\n }\n\n #line-current-calc-root .lcc-title-dot {\n width: 0.5rem;\n height: 0.5rem;\n border-radius: 9999px;\n background: #06b6d4;\n flex-shrink: 0;\n }\n\n #line-current-calc-root .lcc-stack {\n margin-top: 1.5rem;\n display: flex;\n flex-direction: column;\n gap: 1.25rem;\n }\n\n #line-current-calc-root .lcc-label {\n display: block;\n font-size: 0.75rem;\n font-weight: 500;\n color: #64748b;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n margin-bottom: 0.5rem;\n }\n\n #line-current-calc-root .lcc-select,\n #line-current-calc-root .lcc-input {\n width: 100%;\n border-radius: 0.5rem;\n border: 1px solid #cbd5e1;\n background: #fff;\n padding: 0.75rem 1rem;\n font-size: 0.875rem;\n color: #0f172a;\n }\n\n #line-current-calc-root .lcc-select,\n #line-current-calc-root .lcc-input.lcc-mono {\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n }\n\n #line-current-calc-root .lcc-input:focus,\n #line-current-calc-root .lcc-select:focus {\n outline: 2px solid rgb(6 182 212 \/ 0.35);\n outline-offset: 0;\n border-color: #06b6d4;\n }\n\n #line-current-calc-root .lcc-input--amber:focus {\n outline-color: rgb(245 158 11 \/ 0.35);\n border-color: #f59e0b;\n }\n\n #line-current-calc-root .lcc-hint {\n margin: 0.5rem 0 0;\n font-size: 0.75rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-hint--cyan {\n color: #0e7490;\n }\n\n #line-current-calc-root .lcc-row {\n display: flex;\n gap: 0.75rem;\n align-items: stretch;\n }\n\n #line-current-calc-root .lcc-input--grow {\n flex: 1;\n min-width: 0;\n }\n\n #line-current-calc-root .lcc-unit {\n display: flex;\n align-items: center;\n color: #64748b;\n font-size: 0.875rem;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n flex-shrink: 0;\n }\n\n #line-current-calc-root .lcc-quick-label {\n margin: 0.75rem 0 0;\n font-size: 0.75rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-quick-row {\n margin-top: 0.5rem;\n display: flex;\n flex-wrap: wrap;\n gap: 0.5rem;\n }\n\n #line-current-calc-root .lcc-qp {\n cursor: pointer;\n border-radius: 0.375rem;\n border: 1px solid #cbd5e1;\n background: #fff;\n padding: 0.375rem 0.75rem;\n font-size: 0.75rem;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n color: #92400e;\n transition: background 0.15s, border-color 0.15s;\n }\n\n #line-current-calc-root .lcc-qp:hover {\n background: #fffbeb;\n border-color: #fbbf24;\n }\n\n #line-current-calc-root .lcc-qp.lcc-qp--active {\n border-color: #f59e0b;\n background: #fef3c7;\n box-shadow: 0 1px 2px rgb(0 0 0 \/ 0.06);\n }\n\n #line-current-calc-root .lcc-grid-2 {\n display: grid;\n gap: 1rem;\n }\n\n @media (min-width: 640px) {\n #line-current-calc-root .lcc-grid-2 {\n grid-template-columns: 1fr 1fr;\n }\n }\n\n #line-current-calc-root .lcc-micro {\n margin: 0.25rem 0 0;\n font-size: 0.6875rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-actions {\n margin-top: 2rem;\n display: flex;\n justify-content: center;\n }\n\n \/* Main calculate \u2014 isolated from theme buttons *\/\n #line-current-calc-root #btnCalculate {\n width: 33.333%;\n min-width: 7.5rem;\n max-width: 12rem;\n border-radius: 0.75rem;\n padding: 0.875rem 0.5rem;\n font-size: 0.875rem;\n font-weight: 600;\n cursor: pointer;\n background-color: #2563eb !important;\n border: 1px solid #2563eb !important;\n color: #fff !important;\n -webkit-text-fill-color: #fff !important;\n text-decoration: none !important;\n box-shadow: 0 4px 6px -1px rgb(0 0 0 \/ 0.1), 0 2px 4px -2px rgb(0 0 0 \/ 0.1) !important;\n outline: none !important;\n font-family: inherit;\n line-height: 1.25;\n transition: background-color 0.15s, border-color 0.15s;\n }\n\n #line-current-calc-root #btnCalculate:hover,\n #line-current-calc-root #btnCalculate:focus:hover {\n background-color: #1d4ed8 !important;\n border-color: #1d4ed8 !important;\n color: #fff !important;\n -webkit-text-fill-color: #fff !important;\n }\n\n #line-current-calc-root #btnCalculate:active {\n background-color: #1e40af !important;\n border-color: #1e40af !important;\n }\n\n #line-current-calc-root #btnCalculate:focus-visible {\n outline: 2px solid #3b82f6 !important;\n outline-offset: 2px !important;\n }\n\n #line-current-calc-root .lcc-result-heading {\n margin: 0;\n font-size: 0.875rem;\n font-weight: 600;\n color: #155e75;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n }\n\n #line-current-calc-root .lcc-result-amps {\n margin: 1.5rem 0 0;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n font-size: clamp(2.25rem, 8vw, 3.75rem);\n font-weight: 700;\n color: #0f172a;\n font-variant-numeric: tabular-nums;\n line-height: 1.1;\n }\n\n #line-current-calc-root .lcc-result-sub {\n margin: 0.5rem 0 0;\n font-size: 0.875rem;\n color: #155e75;\n }\n\n #line-current-calc-root .lcc-result-sub strong {\n font-weight: 600;\n }\n\n #line-current-calc-root .lcc-dl {\n margin: 2rem 0 0;\n padding-top: 1.5rem;\n border-top: 1px solid #e2e8f0;\n display: flex;\n flex-direction: column;\n gap: 0.75rem;\n font-size: 0.875rem;\n }\n\n #line-current-calc-root .lcc-dl-row {\n display: flex;\n justify-content: space-between;\n align-items: baseline;\n gap: 1rem;\n }\n\n #line-current-calc-root .lcc-dt {\n margin: 0;\n color: #475569;\n }\n\n #line-current-calc-root .lcc-dd {\n margin: 0;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n color: #0f172a;\n text-align: right;\n }\n\n #line-current-calc-root .lcc-dt .lcc-mono--accent {\n color: #0e7490;\n font-weight: 500;\n }\n\n #line-current-calc-root input[type=\"number\"]::-webkit-inner-spin-button {\n opacity: 0.6;\n }\n <\/style>\n<\/head>\n<body>\n \n <div id=\"line-current-calc-root\" class=\"line-current-calc-embed\">\n <div class=\"lcc-inner\">\n <section class=\"lcc-card lcc-card--params\">\n <h2 class=\"lcc-title\">\n <span class=\"lcc-title-dot\" aria-hidden=\"true\"><\/span>\n Parameters\n <\/h2>\n\n <div class=\"lcc-stack\">\n <div>\n <label class=\"lcc-label\" for=\"region\">Region \/ standard voltage<\/label>\n <select id=\"region\" class=\"lcc-select\">\n <option value=\"380\" data-label=\"China \/ Russia (common)\">China \/ Russia \u00b7 380 V \u00b7 50 Hz<\/option>\n <option value=\"400\" data-label=\"Europe \/ SEA (common)\" selected>Europe \/ SEA \u00b7 400 V \u00b7 50 Hz<\/option>\n <option value=\"415\" data-label=\"UK \/ Aus (industrial)\">UK \/ Australia (typ.) \u00b7 415 V \u00b7 50 Hz<\/option>\n <option value=\"440\" data-label=\"Legacy industrial\">Legacy \/ some regions \u00b7 440 V<\/option>\n <option value=\"480\" data-label=\"USA \/ Mexico (common)\">USA \/ Mexico \u00b7 480 V \u00b7 60 Hz<\/option>\n <\/select>\n <p id=\"voltageHint\" class=\"lcc-hint lcc-hint--cyan\">\n Line-to-line voltage <span class=\"lcc-mono lcc-strong\">V<\/span> \u2014 Europe \/ SEA (common).\n <\/p>\n <\/div>\n\n <div>\n <label class=\"lcc-label\" for=\"powerKw\">Machine power (kW)<\/label>\n <div class=\"lcc-row\">\n <input type=\"number\" id=\"powerKw\" min=\"0\" step=\"0.1\" value=\"16\" placeholder=\"e.g. 22\" class=\"lcc-input lcc-mono lcc-input--grow lcc-input--amber\" \/>\n <span class=\"lcc-unit\">kW<\/span>\n <\/div>\n <p class=\"lcc-quick-label\">Quick select (shaft \/ nameplate kW):<\/p>\n <div class=\"lcc-quick-row\" id=\"quickPowers\">\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"7.5\">7.5<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"11\">11<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"15\">15<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"22\">22<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"30\">30<\/button>\n <\/div>\n <\/div>\n\n <div class=\"lcc-grid-2\">\n <div>\n <label class=\"lcc-label\" for=\"pf\">Power factor (PF)<\/label>\n <input type=\"number\" id=\"pf\" min=\"0.1\" max=\"1\" step=\"0.01\" value=\"0.85\" class=\"lcc-input lcc-mono\" \/>\n <\/div>\n <div>\n <label class=\"lcc-label\" for=\"eta\">Efficiency (\u03b7)<\/label>\n <input type=\"number\" id=\"eta\" min=\"0.1\" max=\"1\" step=\"0.01\" value=\"0.9\" class=\"lcc-input lcc-mono\" \/>\n <p class=\"lcc-micro\">Motor efficiency as decimal (e.g. 0.9 = 90%)<\/p>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"lcc-actions\">\n <button type=\"button\" id=\"btnCalculate\">Calculate<\/button>\n <\/div>\n <\/section>\n\n <section id=\"resultSection\" class=\"lcc-card lcc-card--result lcc-hidden\" aria-live=\"polite\">\n <h2 class=\"lcc-result-heading\">Estimated line current<\/h2>\n <p class=\"lcc-result-amps\" id=\"currentOut\">\u2014<\/p>\n <p class=\"lcc-result-sub\">Amperes per line conductor <strong>(approx.)<\/strong><\/p>\n <dl class=\"lcc-dl\">\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\">Voltage <span class=\"lcc-mono lcc-mono--accent\">V<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispV\">\u2014<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\">Power <span class=\"lcc-mono lcc-mono--accent\">P<\/span><\/dt>\n <dd class=\"lcc-dd\"><span id=\"dispP\">\u2014<\/span> kW<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\"><span class=\"lcc-mono\">PF<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispPf\">\u2014<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\"><span class=\"lcc-mono lcc-mono--accent\">\u03b7<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispEta\">\u2014<\/dd>\n <\/div>\n <\/dl>\n <\/section>\n <\/div>\n <\/div>\n\n <script>\n (function () {\n const SQRT3 = Math.sqrt(3);\n const $ = (id) => document.getElementById(id);\n\n const els = {\n region: $('region'),\n powerKw: $('powerKw'),\n pf: $('pf'),\n eta: $('eta'),\n currentOut: $('currentOut'),\n dispV: $('dispV'),\n dispP: $('dispP'),\n dispPf: $('dispPf'),\n dispEta: $('dispEta'),\n voltageHint: $('voltageHint'),\n quickBtns: document.querySelectorAll('#line-current-calc-root .lcc-qp'),\n btnCalculate: $('btnCalculate'),\n resultSection: $('resultSection'),\n };\n\n function formatA(amps) {\n if (!isFinite(amps) || amps < 0) return '\u2014';\n if (amps >= 100) return amps.toFixed(1);\n if (amps >= 10) return amps.toFixed(2);\n return amps.toFixed(3);\n }\n\n function updateVoltageHint() {\n const opt = els.region.options[els.region.selectedIndex];\n const label = opt ? opt.getAttribute('data-label') || opt.textContent.trim() : '';\n if (els.voltageHint) {\n els.voltageHint.innerHTML =\n 'Line-to-line voltage <span class=\"lcc-mono lcc-strong\">V<\/span> \u2014 ' + label + '.';\n }\n }\n\n function hideResults() {\n if (els.resultSection) els.resultSection.classList.add('lcc-hidden');\n }\n\n function calc() {\n updateVoltageHint();\n if (els.resultSection) els.resultSection.classList.remove('lcc-hidden');\n\n const V = parseFloat(els.region.value, 10);\n const P = parseFloat(els.powerKw.value, 10);\n const PF = parseFloat(els.pf.value, 10);\n const eta = parseFloat(els.eta.value, 10);\n\n els.dispV.textContent = isFinite(V) ? V + ' V' : '\u2014';\n els.dispP.textContent = isFinite(P) ? String(P) : '\u2014';\n els.dispPf.textContent = isFinite(PF) ? PF.toFixed(2) : '\u2014';\n els.dispEta.textContent = isFinite(eta) ? (eta * 100).toFixed(0) + '%' : '\u2014';\n\n if (!isFinite(P) || !isFinite(V) || !isFinite(PF) || !isFinite(eta) || P <= 0 || V <= 0 || PF <= 0 || eta <= 0) {\n els.currentOut.textContent = '\u2014';\n return;\n }\n\n const I = (P * 1000) \/ (SQRT3 * V * PF * eta);\n els.currentOut.textContent = formatA(I);\n }\n\n function highlightQuick(kw) {\n els.quickBtns.forEach(function (btn) {\n const v = btn.getAttribute('data-kw');\n const active = parseFloat(v, 10) === parseFloat(String(kw), 10);\n btn.classList.toggle('lcc-qp--active', active);\n });\n }\n\n function syncQuickHighlight() {\n var val = parseFloat(els.powerKw.value, 10);\n var presets = [7.5, 11, 15, 22, 30];\n var match = presets.some(function (p) { return Math.abs(p - val) < 1e-9; });\n if (match) highlightQuick(val);\n else\n els.quickBtns.forEach(function (btn) {\n btn.classList.remove('lcc-qp--active');\n });\n }\n\n els.region.addEventListener('change', function () {\n updateVoltageHint();\n hideResults();\n });\n\n els.powerKw.addEventListener('input', function () {\n syncQuickHighlight();\n hideResults();\n });\n\n ['input', 'change'].forEach(function (ev) {\n els.pf.addEventListener(ev, hideResults);\n els.eta.addEventListener(ev, hideResults);\n });\n\n els.btnCalculate.addEventListener('click', calc);\n\n els.quickBtns.forEach(function (btn) {\n btn.addEventListener('click', function () {\n const kw = btn.getAttribute('data-kw');\n els.powerKw.value = kw;\n highlightQuick(kw);\n hideResults();\n });\n });\n\n syncQuickHighlight();\n updateVoltageHint();\n })();\n <\/script>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>The 3-Phase Voltage & Industrial Current Calculator is a powerful engineering tool designed to help professionals accurately calculate voltage, current, and power relationships in three-phase…<\/p>","protected":false},"author":2,"featured_media":24471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8413],"tags":[8519,7041,8518],"class_list":["post-24470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unit-and-industry-standard-conversion","tag-current-calc","tag-industrial-power","tag-three-phase","pmpro-has-access"],"acf":[],"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2026\/03\/3-Phase-Voltage-Industrial-Current-Calculator.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/24470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/comments?post=24470"}],"version-history":[{"count":0,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/24470\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media\/24471"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media?parent=24470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/categories?post=24470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/tags?post=24470"}],"curies":[{"name":"\u0648\u0648\u0631\u062f\u0628\u0631\u064a\u0633","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":24470,"date":"2026-03-20T00:54:58","date_gmt":"2026-03-20T00:54:58","guid":{"rendered":"https:\/\/www.mechstream.com\/?p=24470"},"modified":"2026-03-20T01:09:51","modified_gmt":"2026-03-20T01:09:51","slug":"3-phase-voltage-industrial-current-calculator","status":"publish","type":"post","link":"https:\/\/www.mechstream.com\/ar\/3-phase-voltage-industrial-current-calculator\/","title":{"rendered":"3-Phase Voltage & Industrial Current Calculator"},"content":{"rendered":"\n

The 3-Phase Voltage & Industrial Current Calculator<\/strong> is a powerful engineering tool designed to help professionals accurately calculate voltage, current, and power relationships in three-phase electrical systems. Widely used in industrial environments such as manufacturing plants, machinery installations, and electrical system design, this calculator simplifies complex formulas into quick, reliable results. Whether you are sizing cables, selecting equipment, or verifying load conditions, the 3-Phase Voltage & Industrial Current Calculator<\/strong> ensures precise calculations for improved efficiency, safety, and compliance with industry standards. It is an essential resource for engineers, technicians, and industrial equipment buyers working with 380V, 400V, or 480V systems.<\/p>\n\n\n\n\n\n\n \n \n \n Estimated line current calculator<\/title>\n <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\" \/>\n <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin \/>\n <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap\" rel=\"stylesheet\" \/>\n <style>\n \/*\n * No Tailwind \/ no third-party CSS framework \u2014 everything is scoped to #line-current-calc-root\n * with lcc-* classes so WordPress themes cannot clash with generic names like .flex or .hidden.\n *\/\n #line-current-calc-root {\n isolation: isolate;\n line-height: 1.5;\n -webkit-font-smoothing: antialiased;\n }\n\n #line-current-calc-root,\n #line-current-calc-root *,\n #line-current-calc-root *::before,\n #line-current-calc-root *::after {\n box-sizing: border-box;\n }\n\n #line-current-calc-root .lcc-inner {\n max-width: 36rem;\n margin-left: auto;\n margin-right: auto;\n background: #fff;\n padding: 2rem 1rem 2.5rem;\n font-family: Inter, system-ui, sans-serif;\n color: #1e293b;\n }\n\n @media (min-width: 768px) {\n #line-current-calc-root .lcc-inner {\n padding-top: 2.5rem;\n padding-bottom: 2.5rem;\n }\n }\n\n #line-current-calc-root .lcc-hidden {\n display: none !important;\n }\n\n #line-current-calc-root .lcc-mono {\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n }\n\n #line-current-calc-root .lcc-strong {\n font-weight: 600;\n }\n\n #line-current-calc-root .lcc-card {\n border-radius: 1rem;\n border: 1px solid #e2e8f0;\n padding: 1.5rem;\n box-shadow: 0 1px 2px rgb(0 0 0 \/ 0.05);\n }\n\n @media (min-width: 768px) {\n #line-current-calc-root .lcc-card {\n padding: 2rem;\n }\n }\n\n #line-current-calc-root .lcc-card--params {\n background: rgb(248 250 252 \/ 0.8);\n }\n\n #line-current-calc-root .lcc-card--result {\n margin-top: 1.5rem;\n border-color: #fde68a;\n background: linear-gradient(to bottom right, #fff, rgb(255 251 235 \/ 0.35));\n box-shadow:\n 0 0 0 1px rgb(217 119 6 \/ 0.2),\n 0 8px 32px rgb(217 119 6 \/ 0.08);\n }\n\n #line-current-calc-root .lcc-title {\n margin: 0;\n font-size: 1.125rem;\n font-weight: 600;\n color: #0f172a;\n display: flex;\n align-items: center;\n gap: 0.5rem;\n }\n\n #line-current-calc-root .lcc-title-dot {\n width: 0.5rem;\n height: 0.5rem;\n border-radius: 9999px;\n background: #06b6d4;\n flex-shrink: 0;\n }\n\n #line-current-calc-root .lcc-stack {\n margin-top: 1.5rem;\n display: flex;\n flex-direction: column;\n gap: 1.25rem;\n }\n\n #line-current-calc-root .lcc-label {\n display: block;\n font-size: 0.75rem;\n font-weight: 500;\n color: #64748b;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n margin-bottom: 0.5rem;\n }\n\n #line-current-calc-root .lcc-select,\n #line-current-calc-root .lcc-input {\n width: 100%;\n border-radius: 0.5rem;\n border: 1px solid #cbd5e1;\n background: #fff;\n padding: 0.75rem 1rem;\n font-size: 0.875rem;\n color: #0f172a;\n }\n\n #line-current-calc-root .lcc-select,\n #line-current-calc-root .lcc-input.lcc-mono {\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n }\n\n #line-current-calc-root .lcc-input:focus,\n #line-current-calc-root .lcc-select:focus {\n outline: 2px solid rgb(6 182 212 \/ 0.35);\n outline-offset: 0;\n border-color: #06b6d4;\n }\n\n #line-current-calc-root .lcc-input--amber:focus {\n outline-color: rgb(245 158 11 \/ 0.35);\n border-color: #f59e0b;\n }\n\n #line-current-calc-root .lcc-hint {\n margin: 0.5rem 0 0;\n font-size: 0.75rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-hint--cyan {\n color: #0e7490;\n }\n\n #line-current-calc-root .lcc-row {\n display: flex;\n gap: 0.75rem;\n align-items: stretch;\n }\n\n #line-current-calc-root .lcc-input--grow {\n flex: 1;\n min-width: 0;\n }\n\n #line-current-calc-root .lcc-unit {\n display: flex;\n align-items: center;\n color: #64748b;\n font-size: 0.875rem;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n flex-shrink: 0;\n }\n\n #line-current-calc-root .lcc-quick-label {\n margin: 0.75rem 0 0;\n font-size: 0.75rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-quick-row {\n margin-top: 0.5rem;\n display: flex;\n flex-wrap: wrap;\n gap: 0.5rem;\n }\n\n #line-current-calc-root .lcc-qp {\n cursor: pointer;\n border-radius: 0.375rem;\n border: 1px solid #cbd5e1;\n background: #fff;\n padding: 0.375rem 0.75rem;\n font-size: 0.75rem;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n color: #92400e;\n transition: background 0.15s, border-color 0.15s;\n }\n\n #line-current-calc-root .lcc-qp:hover {\n background: #fffbeb;\n border-color: #fbbf24;\n }\n\n #line-current-calc-root .lcc-qp.lcc-qp--active {\n border-color: #f59e0b;\n background: #fef3c7;\n box-shadow: 0 1px 2px rgb(0 0 0 \/ 0.06);\n }\n\n #line-current-calc-root .lcc-grid-2 {\n display: grid;\n gap: 1rem;\n }\n\n @media (min-width: 640px) {\n #line-current-calc-root .lcc-grid-2 {\n grid-template-columns: 1fr 1fr;\n }\n }\n\n #line-current-calc-root .lcc-micro {\n margin: 0.25rem 0 0;\n font-size: 0.6875rem;\n color: #64748b;\n }\n\n #line-current-calc-root .lcc-actions {\n margin-top: 2rem;\n display: flex;\n justify-content: center;\n }\n\n \/* Main calculate \u2014 isolated from theme buttons *\/\n #line-current-calc-root #btnCalculate {\n width: 33.333%;\n min-width: 7.5rem;\n max-width: 12rem;\n border-radius: 0.75rem;\n padding: 0.875rem 0.5rem;\n font-size: 0.875rem;\n font-weight: 600;\n cursor: pointer;\n background-color: #2563eb !important;\n border: 1px solid #2563eb !important;\n color: #fff !important;\n -webkit-text-fill-color: #fff !important;\n text-decoration: none !important;\n box-shadow: 0 4px 6px -1px rgb(0 0 0 \/ 0.1), 0 2px 4px -2px rgb(0 0 0 \/ 0.1) !important;\n outline: none !important;\n font-family: inherit;\n line-height: 1.25;\n transition: background-color 0.15s, border-color 0.15s;\n }\n\n #line-current-calc-root #btnCalculate:hover,\n #line-current-calc-root #btnCalculate:focus:hover {\n background-color: #1d4ed8 !important;\n border-color: #1d4ed8 !important;\n color: #fff !important;\n -webkit-text-fill-color: #fff !important;\n }\n\n #line-current-calc-root #btnCalculate:active {\n background-color: #1e40af !important;\n border-color: #1e40af !important;\n }\n\n #line-current-calc-root #btnCalculate:focus-visible {\n outline: 2px solid #3b82f6 !important;\n outline-offset: 2px !important;\n }\n\n #line-current-calc-root .lcc-result-heading {\n margin: 0;\n font-size: 0.875rem;\n font-weight: 600;\n color: #155e75;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n }\n\n #line-current-calc-root .lcc-result-amps {\n margin: 1.5rem 0 0;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n font-size: clamp(2.25rem, 8vw, 3.75rem);\n font-weight: 700;\n color: #0f172a;\n font-variant-numeric: tabular-nums;\n line-height: 1.1;\n }\n\n #line-current-calc-root .lcc-result-sub {\n margin: 0.5rem 0 0;\n font-size: 0.875rem;\n color: #155e75;\n }\n\n #line-current-calc-root .lcc-result-sub strong {\n font-weight: 600;\n }\n\n #line-current-calc-root .lcc-dl {\n margin: 2rem 0 0;\n padding-top: 1.5rem;\n border-top: 1px solid #e2e8f0;\n display: flex;\n flex-direction: column;\n gap: 0.75rem;\n font-size: 0.875rem;\n }\n\n #line-current-calc-root .lcc-dl-row {\n display: flex;\n justify-content: space-between;\n align-items: baseline;\n gap: 1rem;\n }\n\n #line-current-calc-root .lcc-dt {\n margin: 0;\n color: #475569;\n }\n\n #line-current-calc-root .lcc-dd {\n margin: 0;\n font-family: \"JetBrains Mono\", ui-monospace, monospace;\n color: #0f172a;\n text-align: right;\n }\n\n #line-current-calc-root .lcc-dt .lcc-mono--accent {\n color: #0e7490;\n font-weight: 500;\n }\n\n #line-current-calc-root input[type=\"number\"]::-webkit-inner-spin-button {\n opacity: 0.6;\n }\n <\/style>\n<\/head>\n<body>\n \n <div id=\"line-current-calc-root\" class=\"line-current-calc-embed\">\n <div class=\"lcc-inner\">\n <section class=\"lcc-card lcc-card--params\">\n <h2 class=\"lcc-title\">\n <span class=\"lcc-title-dot\" aria-hidden=\"true\"><\/span>\n Parameters\n <\/h2>\n\n <div class=\"lcc-stack\">\n <div>\n <label class=\"lcc-label\" for=\"region\">Region \/ standard voltage<\/label>\n <select id=\"region\" class=\"lcc-select\">\n <option value=\"380\" data-label=\"China \/ Russia (common)\">China \/ Russia \u00b7 380 V \u00b7 50 Hz<\/option>\n <option value=\"400\" data-label=\"Europe \/ SEA (common)\" selected>Europe \/ SEA \u00b7 400 V \u00b7 50 Hz<\/option>\n <option value=\"415\" data-label=\"UK \/ Aus (industrial)\">UK \/ Australia (typ.) \u00b7 415 V \u00b7 50 Hz<\/option>\n <option value=\"440\" data-label=\"Legacy industrial\">Legacy \/ some regions \u00b7 440 V<\/option>\n <option value=\"480\" data-label=\"USA \/ Mexico (common)\">USA \/ Mexico \u00b7 480 V \u00b7 60 Hz<\/option>\n <\/select>\n <p id=\"voltageHint\" class=\"lcc-hint lcc-hint--cyan\">\n Line-to-line voltage <span class=\"lcc-mono lcc-strong\">V<\/span> \u2014 Europe \/ SEA (common).\n <\/p>\n <\/div>\n\n <div>\n <label class=\"lcc-label\" for=\"powerKw\">Machine power (kW)<\/label>\n <div class=\"lcc-row\">\n <input type=\"number\" id=\"powerKw\" min=\"0\" step=\"0.1\" value=\"16\" placeholder=\"e.g. 22\" class=\"lcc-input lcc-mono lcc-input--grow lcc-input--amber\" \/>\n <span class=\"lcc-unit\">kW<\/span>\n <\/div>\n <p class=\"lcc-quick-label\">Quick select (shaft \/ nameplate kW):<\/p>\n <div class=\"lcc-quick-row\" id=\"quickPowers\">\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"7.5\">7.5<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"11\">11<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"15\">15<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"22\">22<\/button>\n <button type=\"button\" class=\"lcc-qp\" data-kw=\"30\">30<\/button>\n <\/div>\n <\/div>\n\n <div class=\"lcc-grid-2\">\n <div>\n <label class=\"lcc-label\" for=\"pf\">Power factor (PF)<\/label>\n <input type=\"number\" id=\"pf\" min=\"0.1\" max=\"1\" step=\"0.01\" value=\"0.85\" class=\"lcc-input lcc-mono\" \/>\n <\/div>\n <div>\n <label class=\"lcc-label\" for=\"eta\">Efficiency (\u03b7)<\/label>\n <input type=\"number\" id=\"eta\" min=\"0.1\" max=\"1\" step=\"0.01\" value=\"0.9\" class=\"lcc-input lcc-mono\" \/>\n <p class=\"lcc-micro\">Motor efficiency as decimal (e.g. 0.9 = 90%)<\/p>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"lcc-actions\">\n <button type=\"button\" id=\"btnCalculate\">Calculate<\/button>\n <\/div>\n <\/section>\n\n <section id=\"resultSection\" class=\"lcc-card lcc-card--result lcc-hidden\" aria-live=\"polite\">\n <h2 class=\"lcc-result-heading\">Estimated line current<\/h2>\n <p class=\"lcc-result-amps\" id=\"currentOut\">\u2014<\/p>\n <p class=\"lcc-result-sub\">Amperes per line conductor <strong>(approx.)<\/strong><\/p>\n <dl class=\"lcc-dl\">\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\">Voltage <span class=\"lcc-mono lcc-mono--accent\">V<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispV\">\u2014<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\">Power <span class=\"lcc-mono lcc-mono--accent\">P<\/span><\/dt>\n <dd class=\"lcc-dd\"><span id=\"dispP\">\u2014<\/span> kW<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\"><span class=\"lcc-mono\">PF<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispPf\">\u2014<\/dd>\n <\/div>\n <div class=\"lcc-dl-row\">\n <dt class=\"lcc-dt\"><span class=\"lcc-mono lcc-mono--accent\">\u03b7<\/span><\/dt>\n <dd class=\"lcc-dd\" id=\"dispEta\">\u2014<\/dd>\n <\/div>\n <\/dl>\n <\/section>\n <\/div>\n <\/div>\n\n <script>\n (function () {\n const SQRT3 = Math.sqrt(3);\n const $ = (id) => document.getElementById(id);\n\n const els = {\n region: $('region'),\n powerKw: $('powerKw'),\n pf: $('pf'),\n eta: $('eta'),\n currentOut: $('currentOut'),\n dispV: $('dispV'),\n dispP: $('dispP'),\n dispPf: $('dispPf'),\n dispEta: $('dispEta'),\n voltageHint: $('voltageHint'),\n quickBtns: document.querySelectorAll('#line-current-calc-root .lcc-qp'),\n btnCalculate: $('btnCalculate'),\n resultSection: $('resultSection'),\n };\n\n function formatA(amps) {\n if (!isFinite(amps) || amps < 0) return '\u2014';\n if (amps >= 100) return amps.toFixed(1);\n if (amps >= 10) return amps.toFixed(2);\n return amps.toFixed(3);\n }\n\n function updateVoltageHint() {\n const opt = els.region.options[els.region.selectedIndex];\n const label = opt ? opt.getAttribute('data-label') || opt.textContent.trim() : '';\n if (els.voltageHint) {\n els.voltageHint.innerHTML =\n 'Line-to-line voltage <span class=\"lcc-mono lcc-strong\">V<\/span> \u2014 ' + label + '.';\n }\n }\n\n function hideResults() {\n if (els.resultSection) els.resultSection.classList.add('lcc-hidden');\n }\n\n function calc() {\n updateVoltageHint();\n if (els.resultSection) els.resultSection.classList.remove('lcc-hidden');\n\n const V = parseFloat(els.region.value, 10);\n const P = parseFloat(els.powerKw.value, 10);\n const PF = parseFloat(els.pf.value, 10);\n const eta = parseFloat(els.eta.value, 10);\n\n els.dispV.textContent = isFinite(V) ? V + ' V' : '\u2014';\n els.dispP.textContent = isFinite(P) ? String(P) : '\u2014';\n els.dispPf.textContent = isFinite(PF) ? PF.toFixed(2) : '\u2014';\n els.dispEta.textContent = isFinite(eta) ? (eta * 100).toFixed(0) + '%' : '\u2014';\n\n if (!isFinite(P) || !isFinite(V) || !isFinite(PF) || !isFinite(eta) || P <= 0 || V <= 0 || PF <= 0 || eta <= 0) {\n els.currentOut.textContent = '\u2014';\n return;\n }\n\n const I = (P * 1000) \/ (SQRT3 * V * PF * eta);\n els.currentOut.textContent = formatA(I);\n }\n\n function highlightQuick(kw) {\n els.quickBtns.forEach(function (btn) {\n const v = btn.getAttribute('data-kw');\n const active = parseFloat(v, 10) === parseFloat(String(kw), 10);\n btn.classList.toggle('lcc-qp--active', active);\n });\n }\n\n function syncQuickHighlight() {\n var val = parseFloat(els.powerKw.value, 10);\n var presets = [7.5, 11, 15, 22, 30];\n var match = presets.some(function (p) { return Math.abs(p - val) < 1e-9; });\n if (match) highlightQuick(val);\n else\n els.quickBtns.forEach(function (btn) {\n btn.classList.remove('lcc-qp--active');\n });\n }\n\n els.region.addEventListener('change', function () {\n updateVoltageHint();\n hideResults();\n });\n\n els.powerKw.addEventListener('input', function () {\n syncQuickHighlight();\n hideResults();\n });\n\n ['input', 'change'].forEach(function (ev) {\n els.pf.addEventListener(ev, hideResults);\n els.eta.addEventListener(ev, hideResults);\n });\n\n els.btnCalculate.addEventListener('click', calc);\n\n els.quickBtns.forEach(function (btn) {\n btn.addEventListener('click', function () {\n const kw = btn.getAttribute('data-kw');\n els.powerKw.value = kw;\n highlightQuick(kw);\n hideResults();\n });\n });\n\n syncQuickHighlight();\n updateVoltageHint();\n })();\n <\/script>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>The 3-Phase Voltage & Industrial Current Calculator is a powerful engineering tool designed to help professionals accurately calculate voltage, current, and power relationships in three-phase…<\/p>","protected":false},"author":2,"featured_media":24471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8413],"tags":[8519,7041,8518],"class_list":["post-24470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unit-and-industry-standard-conversion","tag-current-calc","tag-industrial-power","tag-three-phase","pmpro-has-access"],"acf":[],"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2026\/03\/3-Phase-Voltage-Industrial-Current-Calculator.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/24470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/comments?post=24470"}],"version-history":[{"count":0,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/24470\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media\/24471"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media?parent=24470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/categories?post=24470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/tags?post=24470"}],"curies":[{"name":"\u0648\u0648\u0631\u062f\u0628\u0631\u064a\u0633","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}