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  <description>Free electrical engineering calculators from LMXFORGE — NEC and IEC methods.</description>
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  <lastBuildDate>Thu, 16 Jul 2026 00:00:00 +0000</lastBuildDate>
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    <title>Duct Bank Sizing Calculator</title>
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    <description>Free duct bank sizing calculator — overall envelope dimensions, concrete volume, and minimum burial depth reference for underground conduit duct banks. NEC and IEC.</description>
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    <title>Ground Grid Resistance Calculator</title>
    <link>https://lmxforge.com/calculators/ground-grid-resistance</link>
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    <description>Free ground grid resistance calculator — estimate grid resistance, ground potential rise (GPR), and touch/step voltage from soil resistivity, grid area, and conductor length. IEEE 80 method.</description>
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    <title>Cable Ampacity Derating Calculator</title>
    <link>https://lmxforge.com/calculators/cable-ampacity</link>
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    <description>Free cable ampacity derating calculator — NEC Table 310.16 and IEC 60364-5-52. Temperature correction and grouping/bundling factors.</description>
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    <title>Cable Tray Fill Calculator</title>
    <link>https://lmxforge.com/calculators/cable-tray-fill</link>
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    <description>Free cable tray fill calculator — NEC Article 392 area-fill method for ladder/ventilated trough and solid-bottom tray. Instant pass/fail against code limits.</description>
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    <title>Conduit Fill Calculator</title>
    <link>https://lmxforge.com/calculators/conduit-fill</link>
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    <description>Free conduit fill calculator — NEC Chapter 9 Table 1 and IEC methods. Check fill percentage for EMT, IMC, RMC, PVC and HDPE conduit.</description>
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    <title>Demand Load Calculator</title>
    <link>https://lmxforge.com/calculators/demand-load</link>
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    <description>Free demand load calculator — connected load, demand factors, diversity factor, and design load rollup for panel and switchgear sizing. NEC and IEC.</description>
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    <title>Motor Power Calculator</title>
    <link>https://lmxforge.com/calculators/power-calculator</link>
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    <description>Free motor power calculator — full load current, starting current (LRA), absorbed load, and input power (kW/kVAR/kVA). NEC and IEC methods.</description>
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    <title>Short Circuit Calculator</title>
    <link>https://lmxforge.com/calculators/short-circuit</link>
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    <description>Free short circuit current calculator using the MVA method — three-phase, line-to-line, and line-to-ground fault currents. ANSI/NEC and IEC reference.</description>
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    <title>Voltage Drop Calculator</title>
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    <description>Free online voltage drop calculator for NEC and IEC — three-phase and single-phase, copper and aluminium conductors.</description>
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